MOTOROLA MC34216ADW

Order this document by MC34216A/D
!
PROGRAMMABLE
TELEPHONE LINE
INTERFACE CIRCUIT WITH
LOUDSPEAKER AMPLIFIER
SEMICONDUCTOR
TECHNICAL DATA
The MC34216A is developed for use in telephone applications where,
besides the standard telephone functions, the group listening–in feature is
also required. In cooperation with a microcontroller, the circuit performs all
basic telephone functions including DTMF generation and pulse–dialing.
The listening–in part includes a loudspeaker amplifier, an anti–howling
circuit and a strong supply. In combination with the TCA3385, the ringing is
performed via the loudspeaker.
• Programmable DC Mask, for France, U.K., and Voltage Regulated
Countries
• DC Mask for France and U.K. (MC34216ADWF)
•
•
•
•
•
•
28
1
Programmable Volume for Listening–In and Ringing
DW, DWF SUFFIX
PLASTIC PACKAGE
CASE 751F
Small Amount of External Components
On–Chip DTMF and Ring Signal Generator
Efficient Supply Point for Loudspeaker Amplifier and Peripherals
Programmable Modes for Speakerphone, Answering Machine, Fax and
Modem Applications
Pilot and Idle Tones Provide Extra Phone Features
Simplified Block Diagram
Line +
DC and AC
Termination
Handset
Earpiece
Handset
MIcrophone
Ear
DC Mask
Generation AC
Termination 2–4
Wire Conversion
Supply
Stabilizer
Line
Driver
Mic
PIN CONNECTIONS
AHO1
1
28 AGC
AHO2
2
27 RXO2
MTF
3
26 RXO1
MTC
4
25 RXI
AGnd
5
24 LPI
TXI
6
23 LPO
Mic
7
22 Gnd
LAO
8
LAI
9
HYN 10
NDC 11
21 VCC
20 Iref
19 RS
18 Clk
CM 12
17 D/HS
IMP 13
16 Osc
SAO 14
15 SAI
Anti–
Howling
Base
Loudspeaker
LSP
(Top View)
DTMF and
Ring
Generator
Microcontroller
Interface
ORDERING INFORMATION
Line –
This device contains 6,507 active transistors.
This document contains information on a new product. Specifications and information
herein are subject to change without notice.
MOTOROLA ANALOG IC DEVICE DATA
Device
Operating
Temperature Range
MC34216ADW
MC34216ADWF
TA = 0° to +70°C
Package
SO–28L
SO–28L
 Motorola, Inc. 1996
1
MC34216A
FEATURES
Line Driver and Supply
• DC and AC Termination of the Line
•
•
•
•
•
Programmable DC Mask: France, U.K., Startup, Low Voltage (MC34216ADW)
Programmable DC Mask: France, U.K., Startup (MC34216ADWF)
Current Protection
Adjustable Set Impedance for Resistive and Complex Termination
Efficient Supply Point for Loudspeaker Amplifier and Peripherals
Handset Operation
• Transmit and Receive Amplifiers
•
•
•
•
•
•
Adjustable Sidetone Network
Line Length AGC
Microphone and Earpiece Mute
Earpiece Gain Increase Switch
Microphone Squelch Function
Transmit Amplifier Soft Clipping
Dialing and Ringing
• Generates DTMF, Pilot Tones and Ring Signal
•
•
•
•
•
Interrupter Driver for Pulse–Dialing
Low Current While Pulse–Dialing
Optimized for Ringing via Loudspeaker
Programmable Ring Melodies
Uses Inexpensive 500 kHz Resonator
Loudspeaking Facility
• Integrated Loudspeaker Amplifier
•
•
•
•
Peak–to–Peak Limiter Prevents Distortion
Programmable Volume
Anti–Howling Circuitry for Group Listening–In
Interfacing for Handsfree Conversation
Application Areas
• Corded Telephony with Group Listening–In
•
•
•
Cordless Telephony Base Station with Group Listening–In
Telephones with Answering Machines
Fax, Intercom, Modem
MAXIMUM RATINGS
Rating
Maximum Junction Temperature
Storage Temperature Range
Symbol
Min
Max
Unit
TJ
–
+150
°C
Tstg
– 65
+150
°C
NOTES: 1. Devices should not be operated at or outside these values. The “Recommended
Operating Limits” provide for actual device operation.
2. ESD data available upon request.
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ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
RECOMMENDED OPERATING CONDITIONS
Characteristic
Symbol
Min
Typ
Oscillator Frequency @ Pin 16
fosc
495
Operating Temperature Range
TA
0
2
Max
Unit
500
505
kHz
–
+70
°C
MOTOROLA ANALOG IC DEVICE DATA
MC34216A
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
DC ELECTRICAL CHARACTERISTICS (TA = 25°C)
Characteristic
Symbol
Min
Typ
Max
Unit
VOLTAGE REGULATOR
Regulated Supply at Pin 21
Startup Mode
ICC = 10 mA
ICC = 100 mA
France and U.K.
ICC = 10 mA
ICC = 50 mA
Low Voltage Mode (MC34216ADW Only)
ICC = 10 mA
ICC = 100 mA
Vdc
VCC1
4.25
4.40
4.50
4.65
4.75
4.90
VCC2
4.25
4.30
4.50
4.55
4.75
4.85
VCC3
3.60
3.75
3.90
4.05
4.20
4.35
ICC LD
–
1.2
–
mA
VCC5
4.30
–
4.80
Vdc
Iref
15.3
16.3
17.3
µA
VHSO1
VHSO2
VHSO3
VCC – 1.0
–
VCC – 1.0
–
–
–
–
0.4
–
Vres(on)
Vres(off)
Vres(hys)
–
3.0
–
–
–
0.05
0.40
VCC – 0.1
–
VRXI
VRXO1
VRXO2
Voffset
1.7
1.7
1.7
–
–
–
–
–
2.3
2.5
2.5
0.4
VLPI
VLPO
1.9
1.9
–
–
2.5
2.5
VAHO11
VAHO12
1.15
2.2
–
–
1.65
2.8
VAHO21
VAHO22
1.15
–
–
–
1.65
0.20
VHYN
VHYN–LD
2.4
1.4
–
–
2.7
1.7
VTXI
VMic
Ileak
1.7
–
–
–
–
–
2.0
0.35
5.5
Vdc
I8
I8
–150
150
–
2.1
–110
–
350
2.6
µA
VLAO
S8
–
110
–
1.6
mV
µA/mV
VO1 Follower (I2 = 0 µA)
VO1 – VO2
VO1
∆VO
1.1
40
1.18
80
1.3
120
V
mV
Voltage at IMP (Pin 13)
VIMP
2.2
–
2.5
Vdc
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ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
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Current Consumption at Pin 21, Bit LD = Hi
Regulated Supply in Protection Mode, ICC = 30 mA
Reference Current @ Pin 20
LOGIC PINS
Hook Status Output (Pin 17)
Off–Hook, Iout = – 200 µA
On–Hook, Iout = 200 µA
Bit LD = 1, Iout = – 200 µA
Reset Output (Pin 19)
VCC < 3.0 V
VCC > 3.25 V
Hysteresis
Vdc
Vdc
SPEECH AMPLIFIERS
Earpiece Amplifier DC Bias
RXI, Pin 25
RXO1, Pin 26
RXO2, Pin 27
RXO1 – RXO2 Offset
Loudspeaker Amplifier
LPI, Pin 24
LPO, Pin 23
AHO1 (Pin 1)
Normal Mode (HPI = 0)
Supervision Mode (HPI = 1)
Vdc
Vdc
Vdc
AHO2 (Pin 2)
Normal Mode (MicM = 1)
VCC = 3.5 (MicM = 0)
Bias Voltage at HYN (Pin 10)
Normal Mode
Bit (LD = 1)
Microphone Amplifier
Bias Voltage @ TXI (Pin 6)
Voltage at MIC @ 1.0 mA ( MicP = 1)
Leakage @ MIC @ 4.5 V (MicP = 0)
LAO (Pin 8)
Maximum Current (Source)
Maximum Current (Sink)
Voltage (LD = 1, I = 100 µA)
Driver A8 Slope
MOTOROLA ANALOG IC DEVICE DATA
Vdc
Vdc
µA
3
MC34216A
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ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
DC ELECTRICAL CHARACTERISTICS (continued) (TA = 25°C)
Characteristic
Symbol
Min
Typ
Max
Unit
Startup Mode
Internal Slope
Voltage on SAI (I2C = 5.9 µA)
Voltage on SAI (I2D = 7.1 µA)
Delta Offset Voltage on SAI (I2E = 38 µA)
ri
VC
VD
VE – VD
300
800
–
–
380
–
–
–
460
–
1.5
100
mV/µA
mV
V
mV
French
Internal Slope
Voltage on SAI (I2C = 5.9 µA)
Voltage on SAI (I2D = 7.1 µA)
Delta Offset Voltage on SAI (I2E = 38 µA)
ri
VC
VD
VE – VD
76
280
–
–
103
–
–
–
130
–
460
30
mV/µA
mV
U.K.
Internal Slope
Voltage on SAI (I2C = 5.9 µA)
Voltage on SAI (I2D = 7.1 µA)
Delta Offset Voltage on SAI (I2E = 38 µA)
ri
VC
VD
VE – VD
120
420
–
–
165
–
–
–
210
–
675
40
mV/µA
mV
Low Voltage Mode (MC34216ADW Only)
Internal Slope
Voltage on SAI (I2C = 15 µA)
Voltage on SAI (I2D = 17 µA)
Delta Offset Voltage on SAI (I2E = 20 µA)
ri
VC
VD
VE – VD
95
900
–
–
129
–
–
–
165
–
1.5
100
mV/µA
mV
Vdc
mV
Overvoltage Protection Threshold (VLAI – VSAO)
Iprot = 60 µA, ICC = 70 mA
Vclamp1
485
550
615
mV
Protection Voltage Level (VLAI – VSAO)
Iprot = 60 µA
Vclamp2
370
410
450
mV
Symbol
Min
Typ
Max
Unit
French and U.K.
Maximum Transmit Gain (I2 = 5.6 µA)
Line Length Regulation (I2 = 27.5 µA)
Gain in Protection Mode (I2 = 29.5 µA)
Kµ0
∆Kµ
Kµp
13.5
5.0
13.5
14.5
6.0
14.5
15.5
7.0
15.5
Low Voltage Mode (MC34216ADW Only)
Maximum Transmit Gain (I2 = 3.5 µA)
Line Length Regulation (I2 = 7.7 µA)
Gain in Protection Mode (I2 = 7.7 µA)
Kµ0
∆Kµ
Kµp
13.5
4.7
13.5
14.5
6.0
14.5
15.5
7.3
15.5
∆Kmute
60
–
–
dB
French
Maximum Internal Transconductance (I2 = 5.6 µA)
Line Length Regulation (I2 = 26 µA)
Protection Mode (I2 = 26 µA)
Ge0
∆Ge
Gep
203
5.0
203
230
6.0
230
258
7.0
258
µA/V
dB
µA/V
U.K.
Maximum Internal Transconductance (I2 = 5.6 µA)
Line Length Regulation (I2 = 26 µA)
Protection Mode (I2 = 26 µA)
Ge0
∆Ge
Gep
203
5.0
203
230
6.0
230
258
7.0
258
µA/V
dB
µA/V
Low Voltage Mode (MC34216ADW Only)
Maximum Internal Transconductance (I2 = 3.5 µA)
Line Length Regulation (I2 = 7.9 µA)
Protection Mode (I2 = 7.9 µA)
Ge0
∆Ge
Gep
183
4.7
183
210
6.0
210
241
7.3
241
µA/V
dB
µA/V
∆Ge mute
60
–
–
dB
∆Ge1
4.6
5.6
6.6
dB
DC MASK CHARACTERISTICS
AC ELECTRICAL CHARACTERISTICS (TA = 25°C)
Characteristic
TRANSMIT MODE
Gain Reduction when Microphone is Muted
dB
dB
RECEIVE MODE
Earpiece Gain Reduction when Muted
Earpiece Gain Variation (EA Bit Changed to 1)
4
MOTOROLA ANALOG IC DEVICE DATA
MC34216A
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
AC ELECTRICAL CHARACTERISTICS (continued) (TA = 25°C)
Characteristic
Symbol
Min
Typ
Max
Unit
French and U.K.
Transmit Gain (I2 = 2.0 µA)
Variation with Line Length (I2 = 27 µA)
KPABX
∆KPABX
11.4
–0.5
12.5
–
13.6
0.5
Low Voltage Mode (MC34216ADW Only)
Transmit Gain (I2 = 2.0 µA)
Variation with Line Length (I2 = 20 µA)
Variation with Line Current (ICC = 16 mA)
Variation with Line Current (ICC = 7.0 mA)
KPABX
∆KPABX
∆KPABX1
∆KPABX2
11.5
–0.5
–0.5
–2.0
12.5
–
0
0
13.6
0.5
0.5
2.0
French
Internal Transconductance (I2 = 2.0 µA)
Variation with Line Length (I2 = 27 µA)
GPABX
∆GPABX
157
–0.5
180
–
207
0.5
µA/V
dB
U.K.
Internal Transconductance (I2 = 2.0 µA)
Variation with Line Length (I2 = 27 µA)
GPABX
∆GPABX
157
–0.5
180
–
207
0.5
µA/V
dB
Low Voltage Mode (MC34216ADW Only)
Internal Transconductance (I2 = 2.0 µA)
Variation with Line Length (I2 = 20 µA)
Variation with Line Current (ICC = 16 mA)
Variation with Line Current (ICC = 7.0 mA)
GPABX
∆GPABX
∆GPABX1
∆GPABX2
152
–0.5
–0.5
–2.0
175
–
–
–
200
0.5
0.5
2.0
µA/V
dB
TRANSMIT PABX MODE
dB
dB
RECEIVE PABX MODE
DISTORTION
French and U.K.
French
Transmit (I2 = 10–30 µA)
Receive
VE = 700 mV
(I2 = 10 µA)
VE = 1350 mV
THDT
THDR
–
–
–
–
–
–
3.0
3.0
5.0
%
Low Voltage
(MC34216ADW Only)
Transmit (I2 = 10–20 µA)
Receive
VE = 700 mV
(I2 = 20 µA)
VE = 1350 mV
THDT
THDR
–
–
–
–
–
–
3.0
3.0
5.0
%
NOTE: VE is the differential earpiece voltage across Pins 26 and 27.
OTHER ELECTRICAL CHARACTERISTICS (TA = 25°C)
Characteristic
Symbol
Min
Typ
Max
Unit
LINE CURRENT AGC ( RLS = 25 Ω, G0 = G1 = G2 = 1, VLS = 2.0 Vpp, French, U.K., and LV Masks)
Line Current for which AGC is Active
IAGC(on)
–
–
19
mA
VCC with Current AGC “On” (ICC = 13 mA)
VCC AGC
VCC – 5.0%
VCC
–
Vdc
Line Current for which AGC is Inactive
IAGC(off)
21
–
–
mA
1.6
1.2
1.7
1.3
1.8
1.5
VCC – 1.2
0.85
VCC – 1.0
1.0
–
–
VCC – 1.9
0.72
VCC – 1.6
0.85
–
–
∆AGC
1.0
1.25
1.50
dB
Internal Resistor RT
Muted (G2, G1, G0 = 000)
Maximum Gain (G2, G1, G0 = 111)
RT000
RT111
–
40
10
60
18
80
Ω
kΩ
Attenuation Step
∆GLS
3.5
4.5
5.5
dB
PEAK–TO–PEAK AGC (RLS = 25 Ω, C25 = 220 nF, G0 = G1 = G2 = 1, ICC = 40 mA)
DC Level at Pin 28
AGC “Off”
AGC “On”
Vdc
VAGC(off)
VAGC(on)
AGC Upper Threshold
France and U.K.
Low Voltage (MC34216ADW Only)
VLS(up)
AGC Lower Threshold
France and U.K.
Low Voltage (MC34216ADW Only)
VLS(low)
1 Step AGC Gain Variation (LSB)
Vrms
Vrms
ANTI–HOWLING MONITORING RECEIVE GAIN
MOTOROLA ANALOG IC DEVICE DATA
5
MC34216A
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
OTHER ELECTRICAL CHARACTERISTICS (continued) (TA = 25°C)
Characteristic
Symbol
Min
Typ
Max
Unit
RINGING MODE REGULATION
Regulated VCC (RLS = ∞, ICC = 10 mA)
VCCR
5.15
5.5
5.8
Vdc
Current Consumption @ VCC = 3.4 V, RLS = ∞
IcR
–
2.0
2.6
mA
Ringing Regulator Slope
gR
4.8
6.3
7.8
µA/V
IR Peak
2.0
2.5
3.0
µA
VCC0
–
3.8
–
Vdc
∆Kµmth1
∆Kµmth2
–
–0.5
7.0
0
–
0.5
∆GLSmth1
∆GLSmth2
–0.5
–
0
7.0
0.5
–
VAHO1
2.2
–
2.8
Vdc
Gsp
30
32
34
dB
Peak Current @ VCC = 4.2 V
Minimum VCC
MICROPHONE THRESHOLD
Transmit Gain Variation (Mth(on)/Mth(off))
Iu = 33 nA
Iu = 110 nA
LS Gain Variation (Mth(on)/Mth(off))
Iu = 33 nA
Iu = 110 nA
dB
dB
SPEAKERPHONE MODE (G2, G1, G0 = 111, Sp Bit = 1)
DC Level on Pin 1
Speakerphone Gain
MONITORING SIGNAL IN LOUDSPEAKER (R/S = 0, G2, G1, G0 = 111)
DTMF Level
SP = 0
Low Frequency
High Frequency
SP = 1
Low Frequency
High Frequency
mV
VLS–L1
VLS–H1
–
–
200
250
–
–
VLS–L2
VLS–H2
–
–
700
900
–
–
Pilot Tone (PT = 1)
SP = 0
SP = 1
VLS–P1
VLS–P2
–
–
185
560
–
–
Idle Tone (IT = 1)
SP = 0
SP = 1
VLS–I1
VLS–I2
–
–
145
700
–
–
Ring Tone (RT = 1)
SP = 0
SP = 1
VLS–R1
VLS–R2
–
–
1100
1400
–
–
DTMF Level
Low Frequency
High Frequency
VRXO–L
VRXO–H
–
–
12
15
–
–
Pilot Tone (PT = 1)
VRXO–P
–
8.0
–
mV
Idle Tone (IT = 1)
VRXO–I
–
6.0
–
mV
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
mV
mV
mV
MONITORING SIGNAL IN EARPIECE (Single Ended)
mV
IDLE TONE ON LINE
Idle Tone Level (MFC01 = 11, MFO123 = 000)
IIDLE0
400
550
700
nA
IIDLE(step)
–
62
–
nA
Level on LAI (Pin 9, ICC = 20 to 70 mA, French and U.K. Masks)
MFO123 = 1111, High Frequency Group
MFO123 = 0111, High Frequency Group
MFO123 = 0000, Low Frequency Group
IDTMF15
IDTMF12
IDTMF0
1124
988
373
1336
1175
444
1586
1397
528
High/Low Frequency Pre–Emphasis
GDTMF
1.0
2.0
3.0
Step Size
DTMF LEVELS
nA
dB
NOTE: In low voltage mode, above levels must be reduced by 0.5 dB.
6
MOTOROLA ANALOG IC DEVICE DATA
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
MC34216A
DTMF FREQUENCIES
Characteristic
Low Group Frequencies
High Group Frequencies
Min
Typ
Max
Unit
DTMF Std
% Error
689.4
696.4
703.4
Hz
697
–0.09
761.5
769.2
776.9
Hz
770
–0.10
844.7
853.2
861.7
Hz
852
0.14
930.5
939.9
949.3
Hz
941
–0.11
1195.6
1207.7
1219.8
Hz
1209
–0.11
1323.5
1336.9
1350.3
Hz
1336
0.07
1464.5
1479.3
1494.1
Hz
1477
0.16
1617.7
1634
1650.3
Hz
1633
0.06
NOTE: Minimum values based on fosc = 495 kHz. Maximum values based on fosc = 505 kHz.
TEMPERATURE SPECIFICATIONS (TA = 65°C)
Characteristic
Symbol
Min
Max
Unit
DTMFD
–
–27
dB
VCC2 in FR Mode @ ICC = 50 mA
VCC2
4.15
5.0
V
VCCR @ ICC = 10 mA, RLS = ∞
VCCR
5.0
6.0
V
VC on Pin SAI in FR Mode
VC
220
460
mV
Ri Slope in FR Mode
Ri
65
155
kΩ
RT111
35
85
kΩ
DTMF Distortion Level on Pin LAI, Delta Levels
(F = Hi Freq – f = 697 Hz)
RT111 Resistor on LS in FR Mode
Kµ0 in FR Mode
Kµ0
13
16
dB
Ge0 in FR Mode
Ge0
170
270
µA/V
Vresoff
3.0
3.25
V
Reset Off @ VCC = 3.25 V
PIN FUNCTION DESCRIPTION
Pin
Symbol
1
AHO1
Anti–Howling Timing, Speakerphone Input
2
AHO2
Anti–Howling Timing, Low Voltage Line Driver Disable
3
MTF
Microphone Threshold Filtering
4
MTC
Microphone Threshold Timing
5
AGnd
Small Signal Ground
6
TXI
Microphone Amplifier Input
7
Mic
Microphone Bias Current Sink
8
LAO
Line Driver Amplifier Output
9
LAI
Line Driver Amplifier Input
10
HYN
Hybrid Network Input
11
NDC
Noise Decoupling
12
CM
DC Mask Signal Filtering
13
IMP
Reference Voltage
14
SAO
Line Current Sense Amplifier Output
15
SAI
Line Current Sense Amplifier Input
16
Osc
Oscillator Input. Connect to 500 kHz Resonator
17
D/HS
Data Input, Hookstatus Output
18
Clk
Clock Input
19
RS
Reset Output
20
Iref
Reference Current
MOTOROLA ANALOG IC DEVICE DATA
Description
7
MC34216A
PIN FUNCTION DESCRIPTION (continued)
Pin
Symbol
Description
21
VCC
Supply Voltage
22
Gnd
Large Signal Ground
23
LPO
Loudspeaker Amplifier Output
24
LPI
Loudspeaker Amplifier Input
25
RXI
Receive Amplifier Input
26
RXO1
Receive Amplifier Output
27
RXO2
Receive Amplifier Output
28
AGC
Loudspeaker AGC Timing
CIRCUIT DESCRIPTION
Concept
With the MC34216A, a microcontroller and a switched
mode power supply, a telephone set with listening–in function
and ringing via loudspeaker can be built as shown in
Figure 1.
In off–hook position, the application is in speech mode. The
line current flows through transistor T2 and supplies the
application at the supply point VCC which is stabilized by the
MC34216A. The Vline, Iline characteristic is programmed by
the microcontroller and adjusted by the external components
Z0, Z1, Z21 and R1 which are in a regulator loop, acting on
transistor T2. The ac impedance is generated in a similar way.
Handset and loudspeaker can be connected directly to the
MC34216A to perform handset and listening–in operation.
Via the bus, the microcontroller programs the MC34216A to
perform the DTMF/pulse–dialing and supervise the device.
The user keyboard has to be connected to the microcontroller.
In on–hook position, the SMPS supplies the application in
presence of a ringing signal. The microcontroller programs
the MC34216A and a ringing melody can be generated via
the loudspeaker.
The block diagram of the MC34216A (see Figure 2),
shows the basic blocks of the device plus the essential
external components.
Figure 1. Telephone Concept with MC34216A
Hookswitch
Z1
Z0
Z21
T2
VCC
A/B
Handset
Loudspeaker
8
MC34216A
R1
Micro
SMPS
Gnd
MOTOROLA ANALOG IC DEVICE DATA
MC34216A
Figure 2. Block Diagram of the MC34216A with Essential Components
Line +
To IMP To SAI
Z1
C17
Z0
R20
To IMP
C16
HYN
12
LAI
R12
Iref
IMP
13
20
9
R6
R9
DC Mask Generation
AC Termination
2–4 Wire Conversion
Line Length AGC
Protection
Ear
27
RXI
Mute, AGC
Supply–
Stabilizer
References
Ring–
Regulator
MC34216A
LAO
Line
Driver
8
Mic
7
Anti–Howling
Microphone Threshold
Volume
LPO 23
C7
T3
RS
DTMF/Tone
and Ring
Generator
LSP
R30
LPI
Micro–
Interface
Clock
Hook–Detect
19
Clk
18
D/HS
To
Micro–
controller
17
24
Speaker
5
Gnd
Mute, AGC
Mic
C24
21
AGnd
22
25
C5 TXI
6
Handset
Microphone
T2
VCC
RXO1
26
RXO2
Handset
Earpiece
NDC SAO
11
14
CM
10
C20
Z21
C12
R28
28
C21
AGC
1
AHO1
2
C26
AHO2
3
C27
MTF
C28
4
MTC SAI
15
C29
16
Osc
R1
X1
C25
To IMP
Line –
DC CHARACTERISTICS AND STARTUP
Figure 3. General Form of the
DC Mask of the MC34216A
adjustments. The software adjustments make it possible to
program the 4 different basic masks: France, United Kingdom,
Low Voltage and Startup. The hardware adjustments can be
used for fine–tuning. The adjustment possibilities will be
discussed below with the aid of the block diagram of Figure 4.
In Region 1, the transfer of the amplifier G at the HYN input
equals zero. The voltage difference between SAO and SAI
will equal VO1. The slope RE1 of the Vline, Iline characteristic
will equal:
V line
4
VLP
3
R
VLK
2
VLC
1
Iline
0
ILC
ILP
ILK
IVLP
Region 1: Startup, Low Line Current, High Slope
Region 2: Mid Range Line Current, Small Slope
Region 3: High Line Current, High Slope
Region 4: Overload Protection
The MC34216A offers the possibility to adjust the dc
characteristics of all 4 regions via both software and hardware
MOTOROLA ANALOG IC DEVICE DATA
E1
ǒ Ǔ
Z0
+ R1 x 1 ) Z21
In Region 2, the output current of the amplifier G will be
proportional to the input current. As a result, the voltage
between SAO and SAI will increase with the line voltage.
Speech signals on the line are of no influence on this
because they are filtered out via capacitor C16. The slope
RE2 of the Vline, Iline characteristic will equal:
R
ȡȧ
Ȣ
+ R1 x 1 ) Ri
E2
1
Z21
Z0
Z1
)
ȣȧ
Ȥ
In Region 3, the output current of the amplifier G is kept
constant. As a result, the slope in Region 3 will equal the
slope of Region 1.
9
MC34216A
Figure 4. DC Part of the Block Diagram of the MC34216A
T2
Line +
C16
IMP +
Z1
Z0
2.4 V
CM
+
R5
2VBE ≈ 1.4 V
I2
G
+
Z21
+
HYN
NDC
VCC
LAI
+
SAO
LAO
+
C12
RX
VO1
SAI
+
MC34216A
+
T3
C7
Gnd
VO2
R1
Line –
The transfer from Region 2 to 3 occurs at the point VLK,
ILK, which is calculated:
+ Z1 x I2CD ) 2VBE ) VCD ) VO2
Z21 x ǒZ1 x I2CD ) 2V
Ǔ ) VCD
BE
ILK + Z0
R1
V ) V
D ,
C
With : I2CD + I2C ) I2D , and V
+
CD
When the protection mode is entered, the line current is
reduced to a lower value ILP of:
VLK
and 2V
BE
[ 1.4 V,
2
V
O2
[ 1.1 V
2
When the French or U.K. mask is selected, this transfer
takes place for line currents of 30 mA to 40 mA depending
on the components settings. With the Startup and Low
Voltage mask, the transfer lies outside the normal operating
range with line currents of 90 mA or more. In most
applications, the transfer from Region 1 to 2 takes place for
line currents below 10 mA.
With proper settings, Region 4 is only entered during an
overload condition. In this mode, the power consumption in
the telephone set is limited. In order to detect an overload
condition, the voltage between the Pins LAI and SAO is
monitored. When the voltage difference is larger than the
threshold Vclamp1, the protection is made active. The relation
for the line voltage VLP at this point is given as:
VLP
10
Z0
+ Z21
x V
clamp1
ILP
+
V
clamp2
)
ǒ
Ǔ
V
– V
O1
O2
R1
When the line voltage becomes smaller than VLP, the
overload condition is gone and the MC34216A will leave
Region 4.
The current drawn from the line by the dc part is used to
supply the MC34216A and peripheral circuits. The surplus of
current is sunk away by the voltage stabilizer at Pin VCC
where a reservoir capacitor is connected. The reference for
the circuit is Pin Gnd.
Startup of the application is ensured by an internal startup
circuit. During the startup, the internal registers of the
MC34216A are reset, and the reset Pin RS goes high. This
signals is meant to indicate to the microcontroller that the
programming of the MC34216A can start.
When the line current flows, the hook status output
Pin D/HS goes high. This serves as the information for the
microcontroller that the set is off–hook. When the line current
is no longer present, the pin goes low again. Because the line
current is monitored, and not the line voltage, an interrupt of
the exchange can be recognized.
) VCD ) VO2
MOTOROLA ANALOG IC DEVICE DATA
MC34216A
AC CHARACTERISTICS
Impedance
In Figure 5, the block diagram of the MC34216A
performing the ac impedance is depicted. As can be seen, it
is partly in common with the dc mask block diagram. The part
generating the dc mask is replaced by a dc voltage source
because for ac, this part has no effect.
Transmit
When on Pin LAI a current is injected, via the loop
depicted in Figure 5, a signal is created on the line. In this
way, the microphone signals and DTMF signals from the
internal generator are transmitted. It can be derived that the
signal voltage on the line (Vline) depends on the signal
current injected in LAI (ILAI) according to:
Figure 5. AC Stage of the MC34216A
V
Line +
in
T2
Z0
R5
MC34216A
LAI
+
VCC
LAO
Figure 7. Replacement Diagram for the
Transmit Amplifier
+
+
+
line
With this relation, a simplified replacement circuit can be
made for the transmit amplifier (see Figure 7). Here the
product of ILAI and Z0 is replaced by one voltage source.
T3
Z21
SAO
VO1
Z0 x Z
line
+
–I
x
line
LAI Z ) Z
C7
Zin
Gnd
+
VO2
+
Vline
–ILAI*Z0
SAI
Zline
R1
Line –
–
When calculating the ac loop, it can be derived that the set
impedance Zin equals:
+I
V
Z
in
line
line
ǒ
+ R1 1 )
Ǔ[
Z0
Z21
R1 x Z0
Z21
Figure 8. Microphone Amplifier Input Stage
As can be noticed, the formula for the ac impedance Zin
equals the formula for the dc slope in Regions 1 and 3.
However, because for the dc slopes the resistive part of Z0
and Z21 are used, the actual values for Zin and the dc slopes
do not have to be equal.
A complex impedance can be made by making either Z0
or Z21 complex. When Z0 is made complex to fit the set
impedance, the transmit characteristics will be complex as
well. The complex impedance is therefore preferably made
via the Z21 network. Because Z21 is in the denominator of
the Zin formula, Z21 will not be a direct copy of the required
impedance, but a derivative of it. Figure 6 shows the derived
network to be used for Z21.
Figure 6. Derived Network for Z21 in Case
of Complex Set Impedance
Rv
Rv
SAO
LAI
Ra
Rw
Rb
Cmic
MC34216A
R Mic
Line AGC
Ru
Gnd
2 x Cb
+ 4Rb
R1 x Z0
MOTOROLA ANALOG IC DEVICE DATA
Cu
Iu
RTXI
TXI
ILAI
Ku
MIC
Handset
Microphone
Microphone Threshold
The input stage in Figure 8 consists of a current amplifier
with transfer Ku and impedance RTXI = 1.0 kΩ plus an
attenuator which reduces the signal current at high line
currents, the so–called line length regulated gain or line AGC.
This attenuator can be switched on/off via the microcontroller.
The input current Iu within the telephony speech band is
derived from the microphone signal according to:
Cw
Rv
Cw
VCC
Iu
Cb
+ 2(Ra R1) xRbZ0– R1)
R1 x Z0 (Ra – R1)
Rw +
4Rb (Ra ) Rb – R1)
The microphone signal current is derived from the
microphone signal according to the schematic in Figure 8.
+R
Vu
Vu
[ Ru
)
Ru ) R
Mic
TXI
With: Vu = signal of the microphone only loaded with RMic.
The overall gain from microphone to line (ATX) now follows
as:
A
TX
line + Ku
+ VVu
Ru
Z0 x Z
x
Z
) Zline
in
line
Practically, the gain can only be varied with Z0, Ru and
RMic.
11
MC34216A
Figure 9. Receive Part of the MC34216A
Line +
2.4 V
C17
R20
Z1
MC34216A
–1 X
IMP +
RXO2
HYN
Vref
Cear
+
+
RXO1
Ge
Rload
+
RXI
2VBE + VO1
SAI
Cload
Line AGC
Handset
Earpiece
Gnd
Line –
R1
The noise which is transmitted to the line can be reduced
when the microphone threshold feature is enabled. This is
also called squelch. When there is no microphone signal
present, the transmit gain is reduced by 7.0 dB with respect
to nominal. In between, the gain is varied in steps of 1.0 dB
dependent on the signal level. The detection of the
microphone signal level is done via an integrator which uses
the external capacitors C28 and C29 for timing and filtering.
This feature is also very useful to reduce the howling effect
during listening–in.
The MC34216A offers the possibility to mute the
microphone, also called privacy mode. In this case, the far
end user no longer hears the local user. It is possible to send
during this mode an idle tone to the line to make the far end
user aware of this.
During pulse–dialing, the microphone biasing can be
switched off by programming. Pin Mic will then be made high
impedance, meaning that the microphone dc current no
longer flows into this pin. This reduces the current
consumption of the application during pulse–dialing. It can
also be used to disconnect the handset microphone signal
and enable another transmit signal, for instance from a
handsfree microphone.
Receive
The receive portion of the MC34216A is shown in Figure 9.
The receive signal is picked up by the amplifier at the HYN
input. This is the same amplifier as present in the dc loop of
Figure 4. The signal is first converted to current by the
transconductance amplifier with transfer Ge. The multiplier
placed after performs line length dependent gain or line AGC.
Afterwards, the current is converted back to voltage via the
external feedback network Zload. The resulting voltage is
available at output RXO1, and at RXO2 which is the inverted
earpiece output.
From the diagram of Figure 9 the receive gain (A RX) can
be derived as:
A
RX
With : Z
+ VVRXO + Ge x R1 x Zload x
line
h
x Z1 ,
+ R1R20
ǒ Ǔ
1
Z
h
) Z1
in
The earpiece can either be connected as a single–ended
or as a bridge–tied load. The above calculated gain is valid
for the single–ended case. When connecting as a bridge–tied
load, the gain is increased by 6.0 dB.
The MC34216A offers the possibility to increase the
receive gain to the earpiece with an extra 6.0 dB via the
microcontroller on command of the user of the telephone set.
This is useful for people with hearing problems or when the
far end user speaks very softly.
The MC34216A offers the possibility to mute the signal
coming from the line to the earpiece. This is useful during
pulse–dialing or to mute the far end user.
Sidetone
When a transmit signal is transmitted to the line, a part of
the signal is returned to the receive channel due to the nature
of the 2 to 4 wire conversion of the hybrid. During transmit,
the signal on the line will be –Iline x Zline. During receive, the
signal on the line will be Iline x Zin. When replacing Zin in the
formula for the receive gain, it follows that the signal on the
earpiece output due to a sending signal on the line will be:
V ear
V
line–transmit
+ Ge x R1 x Zload x
ǒ Ǔ
1 – 1
Z
Z
h
line
The sidetone can be minimized by making Zh equal to
Zline. A complex sidetone network can therefore be made via
a complex Z1. The coupling capacitor C17 in series with R20
is only meant to block dc.
Line Length AGC
The MC34216A offers the possibility to vary the transmit
and receive gains over line length in order to compensate for
the loss in gain at longer line lengths. In the block diagrams
of the transmit and receive channels the attenuator
performing the line AGC is already drawn. The line AGC can
be switched on/off via the microcontroller. In case the line
AGC is switched off, the transmit and receive gain are
lowered 2.0 dB with respect to the value calculated via the
formulas above.
The line AGC characteristics for both transmit and receive
channels have the general shape depicted in Figure 10.
also see the sidetone characteristics below.
12
MOTOROLA ANALOG IC DEVICE DATA
MC34216A
The first part of the loudspeaker amplifier equals the
receive part of the earphone amplifier. It therefore also
includes the anti sidetone circuit and the line current AGC.
The overall gain from line to loudspeaker output LPO is
therefore:
Figure 10. General Line AGC Characteristics
Gain
Gain
+
Nominal Gain
1
Nominal
Gain
)
IL – IL start
IL range
A
Reduced
Gain
IL range
For small line currents, and thus long lines, the gains are
nominal. When the line current has increased above IL start
with a current ILrange, the gain is reduced by 6.0 dB. Due to
the general characteristics of the line AGC curve, the gain will
be decreased further for higher currents.
For France and the U.K., the line AGC will be active in
Region 3 of the dc characteristics. The ILstart is approximately
equal to the ILK. The range is determined by:
IL range
ǒ
Ǔ
+ 1 ) R30
R28
x R
T
x G e x R1 x
ǒ Ǔ
1
Z
h
) Z1
in
The gain of the loudspeaker amplifier can be adjusted by
the external components as indicated in the formula above.
However, the gain is also influenced by line length AGC,
volume control and the signal limiter AGC.
The influence of line length AGC on the loudspeaker
channel is equal to its influence on the receive amplifier of the
earpiece because it is in their common path.
The volume of the loudspeaker is controlled via the
microcontroller. In total, 8 levels can be programmed: 7 levels
with equal steps of 4.5 dB and one level which completely
mutes the loudspeaker amplifier.
The output signal is limited by an AGC circuit when the
peaks of the signal are larger than a certain threshold (peak
AGC) and when the line current available is not sufficient
(current AGC). This prevents distortion of the output signal
and a drop of the supply voltage VCC.
Iline
IL start
LSP
Listening–In
During group listening–in, both the handset and the
loudspeaker are active. Via the acoustic coupling from
loudspeaker to handset microphone, howling can occur
when the handset is held close to the base. In order to reduce
howling, an anti–howling correlator and a microphone
threshold are incorporated in the MC34216A. Both functions
can be switched on/off via the microcontroller.
The anti–howling correlator monitors the microphone and
loudspeaker signal via capacitors C26 through C29. When
both signals show a high correlation, then both contain a
common signal. In practice, this means that howling is
present. In this case, the anti–howling correlator will reduce
the loudspeaker gain in steps of 1.25 dB, until the correlation
is below a certain threshold.
– I2CD)
+ Z1 x (I2R
R
E3
For Low Voltage mask, the line AGC is active in Region 2.
Loudspeaking Facility
The MC34216A incorporates a loudspeaking facility which
facilitates group listening–in with incorporated anti–howling
circuitry, handsfree conversation with external duplex
controller and ringing via loudspeaker with external switched
mode power supply.
Loudspeaker Amplifier
The block diagram of the loudspeaker amplifier which is
incorporated in the MC34216A is depicted in Figure 11.
Figure 11. Block Diagram of the Loudspeaker Amplifier
R20
Z1
2.4 V
C17
Line +
MC34216A
IMP
IRX
+
Line AGC
2VBE + VO1
SAI
Gnd
C23
R30
LPI
RT
Anti–
Howl
C24
LPO
Microphone Volume
Threshold Control
HYN
+
+
Signal
Limiter
R28
ACG
Loudspeaker
C25
C21
Line –
R1
MOTOROLA ANALOG IC DEVICE DATA
13
MC34216A
The microphone threshold reduces the gain in the acoustic
feedback loop by 7.0 dB. When there is no, or only a small
microphone signal, the gain in the transmit path is reduced by
7.0 dB with respect to nominal. The loudspeaker gain is then
at its nominal value. At a high microphone input current, the
microphone gain is back to its nominal value and the
loudspeaker gain reduced by 7.0 dB. The behavior of the
microphone threshold feature is depicted in Figure 12.
Figure 12. Behavior of the Microphone
Threshold Feature
Gain
Nominal
A TX
Reduced
A LSP
Iu (Arms)
33 n
110 n
Handsfree
A speakerphone application for handsfree conversation
can easily be made with the MC34216A by adding one of
the Motorola speakerphone cores to it. The TXI input can be
used to amplify the transmit signal and the earphone output
can be used to monitor the receive signal. The receive
output of the speakerphone core can be connected to
AHO1. When programming the MC34216A in speakerphone
mode, the signal on this pin will be amplified to the
loudspeaker output. In this way, the features and
functionality of the MC34216A are optimally used, like its
powerful supply, loudspeaker amplifier with anti–distortion
circuitry and line current regulation. More details about this
application can be found in the user manual.
Ringing
The MC34216A offers the possibility to generate a ringing
melody via the loudspeaker, which avoids the use of a piezo
buzzer. The power needed to supply the loudspeaker is
transformed out of the ringer signal by a switched mode
power supply TCA3385. The melody is generated by the
MC34216A and programmed via the microcontroller. This
concept is depicted in Figure 13.
As can be seen in Figure 13, the high voltage ring signal is
first transformed into a low voltage supply point with high
current capability. This is needed because, compared to a
piezo resonator, a loudspeaker is low ohmic. In the ringing
mode, the voltage of the supply point is stabilized by the
MC34216A to 5.5 V. The ringing melody can be programmed
via the microcontroller and is generated internally. The output
signal level is regulated via a gain control loop. The loop
couples the value of VCC to the output current of the ringing
melody generator. No ringing melody is made audible when
VCC is below 3.8 V and the maximum volume is reached
when VCC has reached 5.5 V.
To ensure optimum output power under low line current
conditions, the current consumption of the MC34216A in
ringing mode is reduced down to 2.0 mA.
The MC34216A offers the possibility to listen to the ringing
melody while in the speech mode. Although the feeding
conditions are not equal for ringing and speech mode, this
offers the user the possibility to program his own melody and
to adjust the volume.
Figure 13. Concept of Ringing Via Loudspeaker
Hookswitch
C8
LI
R24
R4
Off Hook
Application
C4
VCC
CO
DRV
TCA3385
Rin
T1
D10
C7
Gnd
Ringer
Supply
Regulator
and Melody
Generator
MC34216A
Phone Line
L1
SAI of
MC34216A
LPO
IR
Gnd VCC
RDO
C24
LPI
Microcontroller
Bus
R30
R1
14
MOTOROLA ANALOG IC DEVICE DATA
MC34216A
Programming Possibilities
The MC34216A can be programmed by a microcontroller
via a 2 wire bus. In this way, it is possible to program the dc
mask, DTMF tones, listening–in mode, loudspeaker volume,
etc.
The bus interface of the microcontroller with the
MC34216A consists of 2 wires: a data wire and a clock wire
connected to Pins D/HS and CLK respectively. Also, the
reset Pin RST of the MC34216A is connected to the
microcontroller. The MC34216A itself has a local oscillator
connected to Pin Osc.
The local oscillator needs a 500 kHz parallel mode
ceramic resonator, with approximately 75 pF capacitance,
connected to ground (for instance, the TOKO
FCRK500A–P35). The local oscillator is the reference for all
the internal timings of the MC34216A.
The 2 wire bus is based on the SCI standard. This
standard includes things such as de–bouncing and bus
monitoring in order to check that the data is sent over
correctly. The full bus specification is depicted in Figure 14.
The data is read in during the falling edge of the clock signal.
The clock has to be active only during the transfer of the data.
After the data is sent, the clock has to be kept low.
The D/HS pin is not only the input for the data but also the
output for the hookswitch information. When there is line
current flowing, this pin will be high, provided that the clock
line is low.
The reset Pin RST of the MC34216A is high for supply
voltages on VCC of 3.1 V and higher. It is the indication for the
microcontroller that programming of the device is possible.
When RST becomes high and D/HS is high as well, the
microcontroller can start programming the registers for the
speech mode. When information from the ringer indicates
that there is a ring signal present on the line, the
microcontroller can start programming the registers for
ringing mode.
The registers of the MC34216A are 8–bits wide. The
register bits are shown in Figure 15. The 8–bits can be split
up into 2 address bits and 6 data bits of the format
A1A0D5D4D3D2D1D0. Data is sent over starting with the
address bits (A1 and A0) and then the data bits, D5 through
D0.
During startup of the MC34216A, the registers are
internally reset in order to have a defined state. The contents
of the registers after the reset are also given in Figure 15. In
summary, it starts up with LV mask and handset mode with
the transducers muted.
Figure 14. Bus Specification
TI
Tclk
T(on)
Clk
D/HS
TDS
TDH
T1
Clk
D/HS
Symbol
Tclk
T(on)
TDS
TDH
TD
TI
T1
Vihc
Vilc
Vihd
Vild
Description
Min
Max
Unit
Clock Period
High Level Duration
Data Setup Time
Data Hold Time
Debounce Time
Data Reset Time to First Clock Rising Edge
Interval Between 2 Successive 8–Bit Words
High Input Level – Clock
Low Input Level – Clock
High Input Level – Data
Low Input Level – Data
125
66
10
20
16
40
700
0.7
0.0
1.7
0.0
1000
–
Ton
900
–
–
–
5.0
0.3
5.0
1.2
µs
µs
µs
µs
µs
µs
µs
Vdc
Vdc
Vdc
Vdc
MOTOROLA ANALOG IC DEVICE DATA
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ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
MC34216A
Figure 15. Register Description
Address
Data
Symbol
A1, A0 = 00
D0
MicM
D1
A1, A0 = 01
A1, A0 = 10
A1, A0 = 11
MFC1
MFC0
0
0
0
Function
State at Reset
Microphone Mute
0 = Muted
EM
Earphone Mute
0 = Muted
D2
LD
Loop Disconnect
0 = Loop Closed
D3
PT
Pilot Tone
0 = Tone “Off”
D4
IT
Idle Tone
0 = Tone “Off”
D5
MicP
Microphone Power
0 = Power “Off”
D0
MFC0
Tone Control
0, See Tables Below
D1
MFC1
Tone Control
0, See Tables Below
D2
MF0
Tone Select
0, See Tables Below
D3
MF1
Tone Select
0, See Tables Below
D4
MF2
Tone Select
0, See Tables Below
D5
MF3
Tone Select
0, See Tables Below
D0
R/S
Ring/Speech Mode
0 = Speech Mode
D1
EA
Earphone Gain 6.0 dB
0 = Nominal Gain
D2
G0
Loudspeaker Gain
0, See Tables Below
D3
G1
Loudspeaker Gain
0, See Tables Below
D4
G2
Loudspeaker Gain
0, See Tables Below
D5
RT
Ring Tone
0 = Tone “Off”
D0
DCM0
DC Mask Control
0, See Tables Below
D1
DCM1
DC Mask Control
1, See Tables Below
D2
Sp
Speakerphone Mode
0 = “Off”
D3
GR
Line Length Regulation
0 = “On”
D4
HPI
Anti–Howling
0 = “On”
D5
Mth
Microphone Threshold
0 = “On”
G2
G1
G0
Switch DTMF Generation “Off”
0
0
0
Loudspeaker Amplifier Muted
1
Select DTMF–Pair and Generate
0
0
1
Gain Reduction 27.0 dB
1
0
Select Pilot/Idle/Ring Tone Frequency
0
1
0
Gain Reduction 22.5 dB
1
1
Select DTMF/Idle Tone Level (Level ILAI)
0
1
1
Gain Reduction 18.0 dB
DCM1
DCM0
1
0
0
Gain Reduction 13.5 dB
0
0
Startup Mask for France
1
0
1
Gain Reduction 9.0 dB
0
1
U.K. Mask
1
1
0
Gain Reduction 4.5 dB
1
0
Low Voltage Mask
1
1
1
No Attenuation, Nominal Gain
1
1
French Mask
16
Function
Function
Function
MOTOROLA ANALOG IC DEVICE DATA
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
MC34216A
Figure 16. Register Description
MFC1 = 0, MFC0 = 1
DTMF–Pair (in Hz)
MFC1 = 1, MFC0 = 0
MF3
MF2
MF1
MF0
Low
High
Key
Single Tone
(in Hz)
0
0
0
0
941
1633
D
440
0
0
0
1
941
1477
#
494
0
0
1
0
941
1336
0
523
0
0
1
1
941
1209
*
554
0
1
0
0
852
1633
C
587
0
1
0
1
852
1477
9
622
0
1
1
0
852
1336
8
659
0
1
1
1
852
1209
7
698
1
0
0
0
770
1633
B
784
1
0
0
1
770
1477
6
880
1
0
1
0
770
1336
5
988
1
0
1
1
770
1209
4
1047
1
1
0
0
697
1633
A
1319
1
1
0
1
697
1477
3
1661
1
1
1
0
697
1336
2
1760
1
1
1
1
697
1209
1
2093
The dc mask of the MC34216A can be programmed to fit
the different country requirements. During startup, this will be
the first register which has to be programmed in order to have
a dc setting as soon as possible.
The pulse–dialing is timed by the microcontroller
(make/brake ratio, inter–digit pause) by making the LD bit
high and low. Also, memory dialing or last number redial can
be done. During LD = 1, the MC34216A makes its output
LAO low for the line break and reduces its internal current
consumption. The current through the microphone can be
stopped also by making bit MicP low.
The transmit path can be muted by making the MicM bit
low. It effectively mutes both the signal from the handset
microphone as well as the signal coming from a
speakerphone circuit. During this microphone mute state, a
MOTOROLA ANALOG IC DEVICE DATA
melody can be sent to the line (melody on hold). In order to
enable the idle tone function, the IT bit has to be made high.
The squelch function can be enabled by making the Mth bit
low. The line AGC feature can be enabled by making the
GR bit low.
The receive path can be muted by making the EM bit low.
It effectively mutes both the signal from the line to the
handset earpiece as well as to the loudspeaker output.
During this mute state, a pilot tone melody can be sent to the
earpiece or loudspeaker. This is very useful during
pulse–dialing, programming of telephone numbers in
memories or during operation of an answering or fax
machine. In order to enable the pilot tone function, the PT bit
has to be made high. The gain of the earphone amplifier can
be increased by 6.0 dB by making the EA bit high.
17
MC34216A
The MC34216A incorporates a DTMF generator with
integrated filters. The DTMF pairs can be selected by the
microcontroller via the MF bits. In this way, the whole DTMF
range for a 4x4 keyboard is available which fulfills the CCITT
requirements. The DTMF level on the line can be adjusted
by external components and it can also be programmed via
the MF bits.
For listening–in operation, the loudspeaker has to be
switched on and the anti–howling circuitry has to be
activated. The loudspeaker is switched on by making the
G2G1G0 bits high. They also set the volume. The
anti–howling circuit is activated by making bit HPI low. By
making bit Mth high, the microphone threshold feature is
enabled which further reduces the effect of howling.
By making the SP bit high, the speakerphone mode is
programmed. This automatically disables the earpiece by
muting the RXO2 output, and it enables the AHO1 input as a
speakerphone signal input. By making the MicP bit low, the
handset microphone is no longer powered and is thus muted.
This ensures that only the signal from the base microphone is
transmitted to the line.
By making the R/S bit high, the ringing mode is
programmed. The ringing melody is programmed via the
microcontroller and generated by the MC34216A. The
volume can be programmed via the 3 loudspeaker gain bits
G2G1G0. The ring melody is enabled by making the ring
tone switch RT high. The melody can be tested during
normal speech mode by activating the ring tone switch RT
while R/S is low.
The answering machine mode is entered by making the
R/S bit high. This enables the microphone, earphone and
loudspeaker amplifiers while the set is on–hook. This makes
18
it possible to record a message with the handset microphone
and to playback messages via the earpiece or loudspeaker.
Other blocks of the circuit are not activated. During off–hook
operation, the incoming messages can be recorded and the
outgoing message can be played in the normal way. More
details about the answering machine application can be
found in the user manual.
Support Material
Device Specification:
Brief description of the MC34216A,
block diagram, device data, bus
specification, test diagram, typical
application
User Manual MC34216A: Extended description of the circuit
and its concept, description of the
programmability, adjustment
procedure, application hints and
proposals
Demonstration Board:
Performance of the MC34216A is
shown in an application with the
TCA3385 switched mode power
supply and a MC68HC705
microcontroller
Adjustment Software:
A QBASIC program which helps
the customer to find the right
component values for fulfilling the
requirements
Register Display Board:
Visualizes the register contents
which are transmitted on the
demonstration board by means of
LEDs
MOTOROLA ANALOG IC DEVICE DATA
MOTOROLA ANALOG IC DEVICE DATA
C6
Line –
Speaker
Handset
Microphone
Handset
Earpiece
Line +
R31
C20
R9
+
R7
C5
6
C22
C24
C35
7
C34
From
VCC
25
R6 27
R29
Mic
TXI
RXI
RXO2
RXO1
LV = Low Voltage Mode
F = France
U.K. = United Kingdom
C30
C3
26
C19
To IMP
LPO
23
R20
HYN
10
R16
R15
R30
C23
R1
R5
R6
R7
R9
R12
R13
R14
R15
R16
R20
R21
R28
R29
R30
R31
24
LPI
560 k
0
750 k
150 k
7.5 k
20 k
20
R28
15
820
150 k
1.0 k
39 k
69.8 k
560 k
620 k
620 k
120 k
5.1 k
16.2 k
10 k
10
220 k
1.8 k
Value Value
Component LV
F
C17
C11
C21
330 k
620 k
620 k
120 k
13 k
15 k
15
Value
U.K.
CM
12
SAO
14
MC34216A
NDC
11
C12
To SAI
C26
1
28
C25
AHO1
LAI
9
2
C27
AHO2
3
IMP
13
R14
C28
C29
To IMP
4
MTC
C22
C23
C24
C25
C26
C27
C28
C29
C30
C31
C32
C34
C35
T2
T3
X1
15
Osc
16
100 n
330 p
47 µ
220 n
220 n
220 n
15 n
100 n
10 µ
100 n
1.0 n
4.7 n
2.2 µ
MJE350
MPSA42
500 kHz
SAI
R12
Iref
20
C10
Value
Component LV, F, U.K.
R13
MTF
330 p
470 p
10 n
Value Value
F
U.K.
C13
R21
470 p
220 p
10 n
22 n
470 µ
0
4.7 n
220 p 470 p
10 n 1.0 n
470 p
470 p
470 n
680 n
100 n
10 µ
68 n
AGC
C2
C3
C5
C6
C7
C10
C11
C12
C13
C14
C16
C17
C19
C20
C21
Value
Component LV
C16
To IMP
C14
To HYN
Figure 17. Typical Application
X1
D/HS
Clk
RS
LAO
Gnd
AGnd
VCC
17
18
19
8
22
5
21
C32
C2
C31
R1
T3
R5
C7
To Microcontroller
+
T2
MC34216A
19
MC34216A
OUTLINE DIMENSIONS
DW, DWF SUFFIX
PLASTIC PACKAGE
CASE 751F–04
ISSUE E
-A28
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSION A AND B DO NOT INCLUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15
(0.006) PER SIDE.
5. DIMENSION D DOES NOT INCLUDE
DAMBAR PROTRUSION. ALLOWABLE
DAMBAR PROTRUSION SHALL BE 0.13
(0.005) TOTAL IN EXCESS OF D
DIMENSION AT MAXIMUM MATERIAL
CONDITION.
15
14X
-B1
P
0.010 (0.25)
M
B
M
14
28X D
0.010 (0.25)
M
T A
S
B
M
S
R X 45°
C
-T26X
-T-
G
K
SEATING
PLANE
F
J
DIM
A
B
C
D
F
G
J
K
M
P
R
MILLIMETERS
MIN
MAX
17.80 18.05
7.40
7.60
2.35
2.65
0.35
0.49
0.41
0.90
1.27 BSC
0.23
0.32
0.13
0.29
0°
8°
10.05 10.55
0.25
0.75
INCHES
MIN
MAX
0.701 0.711
0.292 0.299
0.093 0.104
0.014 0.019
0.016 0.035
0.050 BSC
0.009 0.013
0.005 0.011
0°
8°
0.395 0.415
0.010 0.029
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit,
and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters can and do vary in different
applications. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. Motorola does
not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in
systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of
the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such
unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless
against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part.
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are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.
How to reach us:
USA / EUROPE: Motorola Literature Distribution;
P.O. Box 20912; Phoenix, Arizona 85036. 1–800–441–2447
JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, Toshikatsu Otsuki,
6F Seibu–Butsuryu–Center, 3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 03–3521–8315
MFAX: [email protected] – TOUCHTONE (602) 244–6609
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HONG KONG: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park,
51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298
20
◊
*MC34216A/D*
MC34216A/D
MOTOROLA ANALOG IC DEVICE
DATA