ETC1 NT91214D Tone/pulse dialer Datasheet

NT91214/15 Series
Tone/Pulse Dialer
Features
„ One touch redial operation
„ Tone/Pulse switchable
„ 32 digit capacity for redialing
„ Automatic mixed redialing (last number redial) of pulse
„ Wide operating voltage range: 2V to 5.5V
„ Key-in beep tone output
„ Digits dialed manually after redialing are
„
„
„
„
to DTMF with multiple automatic access pauses
„ PABX auto-pause is 2.2 seconds
„ DTMF Timing:
„
Manual dialing: minimum duration for bursts and
pauses
Redialing: calibrated timing
Hands-Free control function
cascadable
and stored as additional digits for the next redialing
Uses inexpensive ceramic resonator (3.58 MHz)
Two versions for different telephone systems
Built-in power up reset circuit
Four extra function keys: flash, pause, redial and DP
or
DTMF mixed dialing
„ 4 x 4 (or 2 x 8) keyboard can be used
„ Low standby current
General Description
The NT91214/15 is a single-chip, silicon gate, CMOS
integrated circuit with an on-chip oscillator for a 3.58MHz
crystal or ceramic resonator. It provides a dialing pulse
(DP) or dual tone multi-frequency (DTMF) dialing. A
standard 4 x 4 matrix keyboard can be used to support
either DP or DTMF modes.
Up to 32 digits can be saved in the on-chip RAM for
redialing. In the DTMF mode, a short minimum tone
duration and minimum intertone pause allows rapid
dialing. Maximum tone duration depends on the key
depression time during manual dialing.
Pin Configurations
a. 16-Pin Package
b. 18-Pin Packages
(i) Key Tone Output
1
c. 20-Pin Package
(ii) Hands-Free Control
V1.0
NT91214/15 Series
Keyboard Assignments
1
2
3
F1
R1
4
5
6
F2
R2
7
8
9
P
R3
*/T
0
#
RD
R4
C1
C2
C3
GND
1. */T -- In PULSE mode this key works as Pulse → DTMF key (T key). In DTMF mode the key works as * key.
*/T key will occupy one memory digit in either use.
2. F1 -- Flash key. The break time is 297 ms or 96 ms (NT91214/15 respectively)
3. F2 -- Flash key for break time 640 ms
4. P -- Pause key (2.2 seconds)
5. RD -- One key redial key
6. # -- In PULSE mode this key input is neglected. In DTMF mode this key works as # key.
Block Diagram
2
V1.0
NT91214/15 Series
Absolute Maximum Ratings*
*Comments
Supply Voltage (VDD). . . . . . . . . . . . . . . . . . . .≤ 6.0V
Input Voltage (VIN) . . . . . . .VSS - 0.3V to VDD + 0.3V
Output Voltage (VOUT) . . . . VSS - 0.3V to VDD + 0.3V
Output Voltage (VOUT )( DP , XMIT MUTE ) . . . . ≤1.2V
Tone Output Current (I TONE ) . . . . . . . . . . . . . . ≤50mA
Power Dissipation (PD) . . . . . . . . . . . . . . . . . ≤500mW
Operating Temperature (Top). . . . . . . -20°C to +70°C
Storage Temperature (Tstg). . . . . . . -40°C to +150°C
Stresses above those listed under "Absolute Maximum
Ratings" may cause permanent damage to this device.
These are stress ratings only. Functional operation of
this device at these or any other conditions above those
indicated in the operational sections of this specification
is not implied or intended. Exposure to the absolute
maximum rating conditions for extended periods may
affect device reliability.
DC Electrical Characteristics (VDD = 3.5V, VSS = 0V, Fosc = 3.579MHz, Top = 25°C)
Parameter
Operating Voltage
Symbol
VDD
Min.
Typ.
Max.
2.0
5.5
2.0
5.5
Memory Retention Voltage
VMR
Memory Retention Current
IMR
0.05
0.4
IDDP
0.32
1.0
IDDT
0.6
2.0
0.03
0.05
0.5
10
Operating Current
Standby Current
Input Current
R1 - R4 Input Current
Tone out Voltage
HFI Pull Low Current
1
Iso
0.8
1
VIL
0
0.2
PULSE mode
584
730
876
VOR
456
570
684
TONE mode
µA
mA
VDD = 1.0V, HK = VDD
All outputs unloaded
Pulse mode
Tone mode
µA
HK = VDD = 1.5V
HK = VSS
All outputs
unloaded
All outputs
unloaded,
no key
selected
3
-
A
A
VDD
mVp-p
C
Column
Row
µA
5
Test
KT.
A
µA
115
VOC
IHFI
V
Conditions
V
VIH
IR
Unit
VDD = 3.5V
RL = 5K
VDD = 3.5V (Note 1)
HFI pin connected to 0V
D
B
V1.0
NT91214/15 Series
DC Electrical Characteristics (continued)
Parameter
Min.
Typ.
IOH1
0.4
2
mA
VDD = 3.5V
VOH = VDD - 0.4V
B
HFO, KT , MODEOUT
XMITMUTE Sink Current
IOL1
0.9
5.3
mA
VDD = 3.5V
VOL = 0.4V
B
DP Sink Current
IOL2
1.1
5.3
mA
VDD = 3.5V , VOL = 0.4V
B
HFO Drive Current
Distortion
* Note:
DIS%
DIS% =
Max.
1
5
Unit
Test
KT.
Symbol
%
Conditions
* see note below
100 * (V12 + V 2 2 +...+ Vn 2 )1/2
(VIL2 + VIH 2 )1/2
1. V1. . . . Vn are the intermodulation or the harmonic frequencies in the 500Hz to 3400Hz band.
2. VIL and VIH are the individual frequency components of the DTMFsignal.
AC Characteristics
(VDD = 3.5V, VSS = 0V, FOSC = 3.579MHz, Top = 25°C, unless otherwise specified.)
Parameter
Symbol
Min.
Typ.
Max.
Unit
33.3
Make Time
40.0
TM
Conditions
10pps
M/B = 2/3
ms
16.7
20pps
20.0
60.0
TB
10pps
20pps
30.0
824
TIDP
TPAU
2.2
4
M/B = 1/2
M/B = 2/3
ms
458
Pause Time
M/B = 1/2
M/B = 2/3
ms
33.3
Inter-digit Pause Time
M/B = 1/2
M/B = 2/3
66.6
Break Time
M/B = 1/2
10pps
20pps
sec
V1.0
NT91214/15 Series
AC Characteristics (continued)
Parameter
Symbol
Auto-redial Break Time
Min.
Typ.
Max.
Unit
Conditions
* Optional
TAOBK
2.2
sec
Delay time Key valid to Signal Out
TD
0
ms
Key-in Debounce
TKD
21
ms
Key Release Debounce Time
TKLD
5.2
ms
Key-in Tone Duration
TKTD
23
ms
Key-in Tone Frequency
FKT
437
HZ
Minimum Tone Duration Time
TMFD
94
ms
Min. Tone Inter-digit Pause
TTIDP
96
ms
Redial Tone Duration
TMFDR
94
ms
Redial Tone Inter-digit Duration
TTIDPR
96
ms
Comparisons of Specified vs. Actual Tone Frequencies
R/C
Spec.
Actual
Error (%)
Unit
R1
697
699.1
+0.31
Hz
R2
770
771.5
+0.19
Hz
R3
852
852.3
+0.03
Hz
R4
941
942.0
+0.10
Hz
C1
1,209
1,215.7
+0.57
Hz
C2
1,336
1,331.7
-0.32
Hz
C3
1,477
1,471.9
-0.35
Hz
5
Conditions
Fosc = 3.579MHz
V1.0
NT91214/15 Series
Pin Descriptions
Pin No.
Designation
I/O
Description
4
5
OSCI
OSCO
I
Oscillator Input and Output pins
The time base for the NT91214/15 is a
crystal controlled on-chip oscillator,
which is completed by connecting a
3.58MHz crystal or ceramic resonator
between the OSCI and OSCO pins.
3
MODE IN
I, Z
TRI-STATE mode select pin
There are two versions of the
NT91214/15 as follows:
a. NT91215 Series is for European and
American systems.
NT91215A
NT91214A
NT91215B
NT91214B
NT91215C
NT91214C
NT91215D
NT91214D
3
4
3
4
4
5
2
2
3
MODE
IN
Tone/
Pulse
Dial
Rate
M/B
Ratio
VDD
Pulse
10pps
2/3
VSS
Tone
-
-
Floating
Pulse
10pps
1/2
b. The NT91214 Series is for the
Japanese system.
MODE
IN
Tone/
Pulse
Dial
Rate
M/B
Ratio
VDD
Pulse
10pps
1/2
VSS
Tone
-
-
Floating
Pulse
20pps
1/2
The mode selection pin is checked for
tone/pulse dialing as each digit key
entery. In the PULSE mode, the dialing
rate is checked, along with the
make/break ratio, at first key entry.
6
V1.0
NT91214/15 Series
Pin Descriptions (continued)
Pin No.
Designation
I/O
Description
2
HK
I
Hook switch input
This inverter input pin detects the state
of the hook switch contact. "Off Hook" is
represented by a VSS condition. "On
Hook" is represented by a VDD
condition.
(N.A.)
11
KT
O
Key-in tone output
This N-channel open drain pin sends out
a "beep" tone for each PULSE mode key
entry, along with entries of accepted
function keys (RD, T, F1 F2, and P
keys). The tone output frequency is
437Hz and tone duration is 23 ms.
10
12
DP
O
Dialing pulse output
This is an N-channel open drain output.
The normal output will be "ON" during
break and "OFF" during make in the
PULSE DIALING mode.
NT91215A
NT91214A
NT91215B
NT91214B
NT91215C
NT91214C
NT91215D
NT91214D
1
1
2
(N.A.)
10
9
11
7
V1.0
NT91214/15 Series
Pin Descriptions (continued)
Pin No.
NT91215A
NT91214A
(N.A.)
NT91215B
NT91214B
NT91215C
NT91214C
NT91215D
NT91214D
1
1
Designation
I/O
Description
HFO
O
Hands-Free Control I/O pins
These pins enable and disable the HandsFree control function. When input pin HFI
goes low, the Hands-Free Control state is
toggled on. The status of the Hands-Free
control state is listed in the following table:
(N.A.)
Current
State
Hook
sw.
18
20
HFI
I
On
Hook
Off
Hook
7
7
8
8
TONE
8
O
HFO
Next State
Input
HFO
Dialing?
Low HFI
↓
High
Yes
High HFI
↓
Low
No
High HFI
↓
Low
Yes
On
Hook
-
Off
Hook
Low
Yes
Off
Hook
Low
On
Hook
Low
No
Off
Hook
High
On
Hook
High
Yes
Tone dialing output
When a valid keypress is detected in the
DTMF mode, appropriate low group and
high group, frequencies are generated
which hybridizes the dual tone output.
TONE output is in the "OFF" state in
PULSE mode.
V1.0
NT91214/15 Series
Pin Descriptions (continued)
Pin No.
Designation
I/O
Description
9
XMITMUTE
O
Dialing transmission mute output
This is an N-channel open drain output
The XMITMUTE is normally "OFF"
During pulse of DTMF dialing this
output is "ON".
(N.A.)
10
MODE OUT
O
Mode output pin
This is an N-channel, open drain output
It is "ON" during tone output and "OFF"
during pulse output.
15
14
16
R1
Keyboard pins
14
16
15
17
R2
This input serves as the interface to an
XY matrix keyboard. On a 4 x 4 matrix
15
17
16
18
R3
16
18
17
19
R4
10
12
11
13
C1
11
13
12
14
C2
12
14
13
15
C3
6
6
7
7
VDD
5
5
6
6
VSS
NT91215A
NT91214A
NT91215B
NT91214B
NT91215C
NT91214C
NT91215D
NT91214D
8
8
9
(N.A.)
9
13
9
keyboard, the input from the fourth
column, C4 , should be connected to
VSS.
Power supply pins
These devices are designed to operate
from 2.0V to 5.5V.
V1.0
NT91214/15 Series
Operating Procedures
Symbol Definitions:
In the description below, signals are defined in terms of
the key or switch which is activated.
OFF Hook
b. On Hook
means the phone is off the hook.
HFI ↓
D1 . . . Dn
Pulse mode is defined as the INITIAL mode, provided
On Hook means that the phone is on the hook.
the key input D1 is not */T while the mode
D1
represents for the first digit dialed in a string of
selection pin is VDD or floating. The chip will pause for
digits.
824 ms automatically after it detects an Off Hook
( Dk ) represents for the last digit dialed in a
condition or if the HFI ↓ key is depressed. It then
Dn
string of digits.
Dn+1
proceeds with pulse or DTMF dialing if any keys have
represents for the beginning of a new string of
been depressed.
digits.
The dialing rate or make/break ratio is decided at the
Dn+m represents for the last digit in a new string of
first key entry by checking the MODE IN status and
will
digits.
HFI ↓
not be altered. The MODE IN status can only switch
represents for the switch that activates the
the DIALING mode from PULSE to DTMF after the
first
HANDS-FREE DIALING mode going low
*/T
is the Pulse-to-DTMF key
key entry.
RD is the Redial key.
0
is the Zero key.
P
is the Pause key.
F
is the Flash key.
2. DTMF mode operation
a. Off Hook
DTMF mode is defined as the INITIAL mode if the
mode selection pin MODE IN is VSS.
1. PULSE mode operation
b. Off Hook
D1 . . . Dn
HFI ↓
PULSE mode is defined as the INITIAL mode,
provided
the first keyboard input is not the
the
Off Hook
HFI ↓
or On Hook
D1 . . . Dn
Recommended Operation:
a. Off Hook
D1 . . . Dn
*/T
*/T
*/T
D1 . . . Dn or On Hook
D1 . . . Dn
The INITIAL mode is PULSE mode if the mode
selection pin, MODE IN, is VDD or floating. The */T
key following
key can switch the DIALING mode to TONE mode.
condition and the mode selection pin
is
Unlike NORMAL mode switching, the
entry,
floating (MODE IN = VDD or floating).
10
*/T
key
V1.0
NT91214/15 Series
as the first key pressed, will not produce any pause
time. There are only 31 digits of redial memory
available in the buffer to be used for operations a
and b, since the mode switching key, */T , will
occupy one digit of space.
11
V1.0
NT91214/15 Series
3. Manual dialing with automatic access pause
The mode selection pin is alwsys checked for TONE
a. Off Hook
O
P
D1 . . .
Dn
or PULSE mode key entry. Dialing can be switched
pause key entries can be accepted and stored in the
from PULSE to TONE mode, but not from TONE to
redial memory. Each is stored as a digit.
PULSE mode. Switching the MODE IN pin to the
Each key-in will provide a pause of 3.57 seconds,
original digits plus the digits dialed after pressing will
depending on which model is being used.
cause the chip to store a
4. Redial
a. On Hook
RD or On Hook
*/T
digit prior to the first
tone digit in the redial memory and will automatically
HFI ↓
RD
insert a 2.2 second pause before the tone digits are
Up to 32 digits (in PULSE mode) or 31 digits
dialed out. After the mode bas been switched, the
(in TONE mode) can be dialed using the
RD key.
status of the mode selection pin will no longer be
The
RD
key is disabled while PULSE or TONE
checked. Therefore, it will not be possible to switch
signals are being transmitted. Redial will also be
from TONE to PULSE mode.
inhibited if the last number dialed exceeds 32 digits
because the redial memory can only hold 32 digits.
b.
Off Hook
D1
...
Dn
*/T
Dn+1
PULSE Mode
b.
Off Hook
RD
D1 . . . Dn or
On Hook
. . .
HFI ↓
RD
D1
Dn+m
. . . Dn
DTMF Mode
After pressing the RD key, digits may be added to
PULSE mode is initially defined with the mode
the number in redial memory. When finished
dialing,
the redial memory will contain the original digits,
selection pin, MODE IN, equal to VDD or floating. At
this time, the mode can be switched to DTMF by
plus the digits dialed after pressing RD . Each time
pressing the */T key. DTMF mode will being as soon
the redial key is pressed, the stored number will be
as the last pulse has been transmitted. In this mode,
dialed exactly the same as it was previously,
Dn+1
through
Dn+m
are sent through the TONE
regardless of the status of the MODE IN pin.
OUT pin as DTMF signals. If a
On Hook
D1 . . . Dn
key entry is
Contained in the series of digits before or after the */T
5. TONE/PULSE switching operation
a.
P
entry, or the MODE IN switch is depressed, 2.2
second
MODE IN pin
PULSE Mode
pause will be added to the automatically inserted
switched to VSS
Dn+1
. . . Dn+m
pause time, which is also 3.57 seconds. Both of the
DTMF Mode
12
V1.0
NT91214/15 Series
above switching modes can store as many as 31 digits
in the redial memory.
13
V1.0
NT91214/15 Series
6. One-key redialing
Off Hook
break of 96 ms or 640 ms (or, 297 ms or 640 ms,
D1 . . . Dn
D1 . . . Dn
RD or On Hook
HFI ↓
depending on the model) on the DP output pin. Then, it
pauses for 824 ms and continues dialing the digits,
RD
If the dialing of
D1
to
Dn
D1 to Dn . These digits are then stored in the redial
is finished, pressing
memory.
RD will cause the pulse dialing pin to go low for 1.67
seconds of break time and an 824 ms pause will
Each time the flash key is pressed, the redial memory
will
automatically be added. If the pulses of the number
dialed with
D1
to
Dn
be cleared to store a new entry. In addition, the MODE
IN
have not finished, the
pressing of the redial key will be ignored.
status will be checked again for the setting of the
TONE/PULSE DIALING mode.
7. Flash dialing
Off Hook
HFI ↓
F
F
D1
D1
. . . Dn
...
or
Similarly, to make sure that the IC is working properly,
On Hook
new flash key inputs will be ignored as long as the digits
Dn
that were dialed have not finished.
The flash keys emulate quick On-Off Hook operations.
Pressing the flash keys,
F1
or
F2 , will cause a
Timing Waveforms
1. Timing Waveform in PULSE Mode:
H K or HFO
Key Input
2
1
3
T K D: d e b o u n c i n g t i m e 2 1 m s
KT
T K T D (23 ms), f = 437Hz
XMIT MUTE
Td
T IDP
TM
TM
21ms
DP
TM
Td:
TIDP:
TKTO:
TKD:
Note:
high.
TB
Delay time of Key valid to dialing signal out, typically 0ms
Inter-digit pause time
Key-in tone duration
Debouncing time
" HK " or "HFO" indicates chip works when hook switch " HK " goes low or Hands-Free control output HFO goes
14
V1.0
NT91214/15 Series
Timing Waveforms (continued)
2. Timing Waveform in TONE Mode:
(i) Normal Dialing
H K or HFO
Key Input
3
4
*
9
T KD
KT
XMIT MUTE
Td
TMFD:94ms
2.5ms
2.3ms
TONE
2.3ms
2.3ms
T T I D P: 9 6 m s
MODE OUT
(ii) After (i), Redialing
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15
V1.0
NT91214/15 Series
Timing Waveforms (continued)
3. Timing waveform for SWITCHING Mode Operation:
(i) By mode selection pin switches
H K or HFO
Key Input
2
*/T
3
MODE IN
****
6
****
4
*******************
KT
DP
TM
T IDP
TM
MODE OUT
T IDP
XMIT MUTE
Td
T PAU
T MFD
TONE
(ii) By */T key entry
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16
V1.0
NT91214/15 Series
Timing Waveforms(continued)
4. One Key Redial (DTMF mode used as example):
H K or HFO
Key Input
2
RD
3
XMIT MUTE
DP
T AOBK
Td
2.5ms
Td
2.5ms
TONE
MODE OUT
TAOBK: Break time (2.2 secs)
5. Flash Dialing (DTMF mode used as example):
H K or HFO
//
Key Input
//
XMIT MUTE
//
DP
//
MODE OUT
//
F
6
4
3
T fsh
T PAU
TONE
2.5ms
2.5ms
//
Tfsh: flash time 96 or 640 ms (F1 or F2 respectively) for NT91215
flash time 297 or 640 ms (F1 or F2 respectively) for NT91214
17
V1.0
NT91214/15 Series
Application Circuit (for reference only)
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V1.0
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NT91214/15 Series
Test Circuits
(A)
(B)
(C)
(D)
OSCILLOSCOPE: TEKTRONI X 468
SPECTURM ANALYZER: HP3585A
19
V1.0
NT91214/15 Series
Ordering Information
Part No.
Key Tone
Hands-Free
Control
Dial Rate
Flash
M/B Ratio
F1
Package
F2
NT91214A
N.A.
N.A.
16L DIP
NT91214B
A
N.A.
NT91214C
N.A.
A
18L DIP
NT91214D
A
A
20L DIP
NT91215A
N.A.
N.A.
16L DIP
NT91215B
A
N.A.
NT91215C
N.A.
A
NT91215D
A
A
10/20pps
10pps
1/2
1/2
2/3 selectable
297 ms
96 ms
640 ms
640 ms
18L DIP
18L DIP
18L DIP
20L DIP
20
V1.0
NT91214/15 Series
Package Information
DIP 16L Outline Dimensions
unit: inches/mm
D
9
1
8
E1
16
E
A1
A2
Base Plane
Seating Plane
L
A
C
S
B
α
e1
B1
Symbol
Dimensions in inches
Dimensions in mm
A
0.175 Max.
4.45 Max.
A1
0.010 Min.
0.25 Min.
A2
0.130±0.010
3.30±0.25
B
0.018 +0.004
-0.002
0.46 +0.10
-0.05
B1
0.060 +0.004
-0.002
1.52 +0.10
-0.05
C
0.010 +0.004
-0.002
0.25 +0.10
-0.05
eA
D
0.750 Typ. (0.770 Max.)
E
0.300±0.010
19.05 Typ. (19.56 Max.)
7.62±0.25
E1
0.250 Typ. (0.262 Max.)
6.35 Typ. (6.65 Max.)
e1
0.100±0.010
2.54±0.25
L
0.130±0.010
3.30±0.25
α
0° ~ 15°
0° ~ 15°
eA
0.345±0.035
8.76±0.89
S
0.040 Max.
1.02 Max.
Notes:
1. The maximum value of dimension D includes end flash.
2. Dimension E1 does not include resin fins.
3. Dimension S includes end flash.
21
V1.0
NT91214/15 Series
Package Information
DIP 18L Outline Dimensions
unit: inches/mm
D
10
E1
18
1
9
E
A1
A2
Base Plane
Seating Plane
L
A
C
S
B
α
e1
B1
Symbol
Dimensions in inches
Dimension in mm
4.45 Max.
A
0.175 Max.
A1
0.010 Min.
0.25 Min.
A2
0.130±0.010
3.30±0.25
B
0.018 +0.004
-0.002
0.46 +0.10
-0.05
B1
0.060 +0.004
-0.002
1.52 +0.10
-0.05
C
0.010 +0.004
-0.002
0.25 +0.10
-0.05
D
0.900 Typ. (0.920 Max.)
22.86 Typ. (23.37 Max.)
E
0.300±0.010
7.62±0.25
E1
0.250 Typ. (0.262 Max.)
6.35 Typ. (6.65 Max.)
e1
0.100±0.010
2.54±0.25
L
0.130±0.010
3.30±0.25
α
0° ~ 15°
0° ~ 15°
eA
0.345±0.035
8.76±0.89
S
0.055 Max.
1.40 Max.
eA
Notes:
1. The maximum value of dimension D includes end flash.
2. Dimension E1 does not include resin fins.
3. Dimension S includes end flash.
22
V1.0
NT91214/15 Series
Package Information
DIP 20L Outline Dimensions
unit: inches/mm
D
11
E1
20
1
10
E
A1
A2
Base Plane
Seating Plane
L
A
C
S
B
α
e1
B1
Symbol
Dimensions in inches
Dimensions in mm
4.45 Max.
A
0.175 Max.
A1
0.010 Min.
0.25 Min.
A2
0.130±0.010
3.30±0.25
B
0.018 +0.004
-0.002
0.46 +0.10
-0.05
B1
0.060 +0.004
-0.002
1.52 +0.10
-0.05
C
0.010 +0.004
-0.002
0.25 +0.10
-0.05
D
1.026 Typ. (1.046 Max.)
26.06 Typ. (26.57 Max.)
E
0.300±0.010
7.62±0.25
E1
0.250 Typ. (0.262 Max.)
6.35 Typ. (6.65 Max.)
e1
0.100±0.010
2.54±0.25
L
0.130±0.010
3.30±0.25
α
0° ~ 15°
0° ~ 15°
eA
0.345±0.035
8.76±0.89
S
0.078 Max.
1.98 Max.
eA
Notes:
1. The maximum value of dimension D includes end flash.
2. Dimension E1 does not include resin fins.
3. Dimension S includes end flash.
23
V1.0