MOTOROLA MC145407

Order this document
by MC145407/D
SEMICONDUCTOR TECHNICAL DATA
Advance Information
EIA–232–E and CCITT V.28
The MC145407 is a silicon–gate CMOS IC that combines three drivers and
three receivers to fulfill the electrical specifications of EIA–232–E and CCITT
V.28 while operating from a single + 5 V power supply. A voltage doubler and
inverter convert the + 5 V to ± 10 V. This is accomplished through an on–board
20 kHz oscillator and four inexpensive external electrolytic capacitors. The
three drivers and three receivers of the MC145407 are virtually identical to
those of the MC145406. Therefore, for applications requiring more than three
drivers and/or three receivers, an MC145406 can be powered from an
MC145407, since the MC145407 charge pumps have been designed to
guarantee ± 5 V at the output of up to six drivers. Thus, the MC145407 provides
a high–performance, low–power, stand–alone solution or, with the MC145406,
a + 5 V only, high–performance two–chip solution.
Drivers
• ± 7.5 V Output Swing
• 300 Ω Power–Off Impedance
• Output Current Limiting
• TTL and CMOS Compatible Inputs
• Slew Rate Range Limited from 4 V/µs to 30 V/µs
Receivers
• + 25 V Input Range
• 3 to 7 kΩ Input Impedance
• 0.8 V Hysteresis for Enhanced Noise Immunity
Charge Pumps
• + 5 V to ± 10 V Dual Charge Pump Architecture
• Supply Outputs Capable of Driving Three On–Chip Drivers and Three
Drivers on the MC145406 Simultaneously
• Requires Four Inexpensive Electrolytic Capacitors
• On–Chip 20 kHz Oscillator
P SUFFIX
PLASTIC DIP
CASE 738
20
1
DW SUFFIX
SOG PACKAGE
CASE 751D
20
1
ORDERING INFORMATION
MC145407P
MC145407DW
Plastic DIP
SOG Package
PIN ASSIGNMENT
C2+
GND
C2–
VSS
Rx1
Tx1
Rx2
Tx2
Rx3
Tx3
1
20 C1+
2
19
3
18
4
17
5
R
R
10
VDD
DO1
14
DO2
D 13 DI2
8
9
C1–
D 15 DI1
6
7
16
VCC
R
12
DO3
D 11 DI3
D = DRIVER
R = RECEIVER
This document contains information on a new product. Specifications and information herein are subject to change without notice.
REV 1
10/95

Motorola, Inc. 1995
MOTOROLA
MC145407
1
FUNCTION DIAGRAM
CHARGE PUMPS
OSC
GND
VCC
C3
VOLTAGE
DOUBLER
VOLTAGE
INVERTER
C1
C2
+
C4
+
VDD
+
+
C1 – C1 +
C2 +
RECEIVER
C2 –
DRIVER
VDD
VDD
VDD
VCC
*
15 kΩ
Rx
+
VSS
* Proctection circuit
VCC
300 Ω
DO
–
5.4 k
MC145407
2
VSS
LEVEL
SHIFT
Tx
+
DI
–
1.4 V
1.0 V
1.8 V
VSS
MOTOROLA
MAXIMUM RATINGS (Voltage polarities referenced to GND)
Rating
DC Supply Voltages
Input Voltage Range
Symbol
Value
Unit
VCC
– 0.5 to + 6.0
V
VIR
Rx1 – Rx3 Inputs
DI1 – DI3 Inputs
V
VSS – 15 to VDD + 15
– 0.5 to (VCC + 0.5)
DC Current per Pin
I
± 100
mA
Power Dissipation
PD
1
W
Operating Temperature Range
TA
– 40 to + 85
°C
Tstg
– 85 to + 150
°C
Storage Temperature Range
This device contains protection circuitry to
protect the inputs against damage due to high
static voltages or electric fields; however, it is
advised that normal precautions be taken to
avoid application of any voltage higher than
maximum rated voltages to this high impedance circuit. For proper operation, it is recommended that the voltages at the DI and DO pins
be constrained to the range GND ≤ VDI ≤ VCC
and GND ≤ VDO ≤ V CC. Also, the voltage at
the Rx pin should be constrained to (VSS
– 15 V) ≤ VRx1 – Rx3 ≤ (VDD + 15 V), and Tx
should be constrained to VSS ≤ VTx1 – Tx3
≤ VDD.
Unused inputs must always be tied to
appropriate logic voltage level (e.g., GND or
VCC for DI, and GND for Rx).
DC ELECTRICAL CHARACTERISTICS (All polarities referenced to GND = 0 V; C1, C2, C3, C4 = 10 µF; TA = – 40 to + 85°C)
Symbol
Min
Typ
Max
Unit
DC Supply Voltage
VCC
4.5
5
5.5
V
Quiescent Supply Current
(Outputs unloaded, inputs low)
ICC
—
1.2
3.0
mA
Iload = 0 mA
Iload = 5 mA
Iload = 10 mA
VDD
8.5
7.5
6
10
9.5
9
11
—
—
V
Iload = 0 mA
Iload = 5 mA
Iload = 10 mA
VSS
– 8.5
– 7.5
–6
– 10
– 9.2
– 8.6
–11
—
—
Parameter
Output Voltage
RECEIVER ELECTRICAL SPECIFICATIONS
(Voltage polarities referenced to GND = 0 V; VCC = + 5 V ± 10%; C1, C2, C3, C4 = 10 µF; TA = – 40 to + 85°C)
Characteristic
Symbol
Min
Typ
Max
Unit
Input Turn–on Threshold
VDO1 – DO3 = VOL
Rx1 – Rx3
Von
1.35
1.8
2.35
V
Input Turn–off Threshold
VDO1 – DO3 = VOH
Rx1 – Rx3
Voff
0.75
1.0
1.25
V
Input Threshold Hysteresis (Von – Voff)
Rx1 – Rx3
Vhys
0.6
0.8
—
V
Input Resistance
Rx1 – Rx3
Rin
3.0
5.4
7.0
kΩ
High–Level Output Voltage
VRx1 – Rx3 = – 3 V to – 25 V
IOH = – 20 µA
IOH = – 1 mA
DO1 – DO3
VOH
Low–Level Output Voltage
VRx1 – Rx3 = + 3 V to + 25 V
IOL = + 20 µA
IOL = + 1.6 mA
DO1 – DO3
MOTOROLA
V
VCC – 0.1
VCC – 0.7
—
4.3
—
—
VOL
V
—
—
0.01
0.5
0.1
0.7
MC145407
3
DRIVER ELECTRICAL SPECIFICATIONS
(Voltage polarities referenced to GND = 0 V: VCC = +5 V ± 10%; C1, C2, C3, C4 = 10 µF; TA = –40 to +85°C)
Characteristic
Digital Input Voltage
Logic 0
Logic 1
DI1 – DI3
Input Current
GND ≤ VDI1 – DI3 ≤ VCC
DI1 – DI3
Symbol
Min
Typ
Max
Unit
VIL
VIH
—
2.0
—
—
0.8
—
Iin
—
—
± 1.0
µA
V
Output High Voltage
VDI1 – DI3 = Logic 0, RL = 3.0 kΩ
Tx1 – Tx3
Tx1 – Tx6*
VOH
6
5
7.5
6.5
—
—
V
Output Low Voltage
VDI1 – DI3 = Logic 1, RL = 3.0 kΩ
Tx1 – Tx3
Tx1 – Tx6*
VOL
–6
–5
– 7.5
– 6.5
—
—
V
Tx1 – Tx3
Zoff
300
—
—
Ω
Tx1 – Tx3
Tx1 – Tx3 shorted to GND**
Tx1 – Tx3 shorted to ± 15 V***
ISC
—
—
—
—
± 60
± 100
Off Source Impedance (Figure 1)
Output Short–Circuit Current
VCC = + 5.5 V
mA
* Specifications for an MC145407 powering an MC145406 with three additional drivers/receivers.
** Specification is for one Tx output pin to be shorted at a time. Should all three driver outputs be shorted simultaneously, device power dissipation
limits could be exceeded.
*** This condition could exceed package limitations.
SWITCHING CHARACTERISTICS (VCC = + 5 V ± 10%; C1, C2, C3, C4 = 10 µF; TA = – 40 to + 85°C; See Figures 2 and 3)
Symbol
Characteristic
Min
Typ
Max
Unit
Drivers
Propagation Delay Time
Low–to–High
RL = 3 kΩ, CL = 50 pF or 2500 pF
Tx1 – Tx3
High–to–Low
RL = 3 kΩ, CL = 50 pF or 2500 pF
Output Slew Rate
Minimum Load: RL = 7 kΩ, CL = 0 pF
µs
tPLH
—
0.5
1
—
0.5
1
—
9.0
± 30
4.0
—
—
tPLH
—
—
1
tPHL
—
—
1
tPHL
Tx1 – Tx3
SR
Maximum Load: RL = 3 kΩ, CL = 2500 pF
V/µs
Receivers (CL = 50 pF)
Propagation Delay Time
Low–to–High
µs
DO1 – DO3
High–to–Low
Output Rise Time
DO1 – DO3
tr
—
250
400
ns
Output Fall Time
DO1 – DO3
tf
—
40
100
ns
MC145407
4
MOTOROLA
PIN DESCRIPTIONS
17
19
VDD VCC
15
DI1
13 DI2
VCC
Digital Power Supply (Pin 19)
6
Tx1
Tx2 8
Vin = ± 2 V
The digital supply pin, which is connected to the logic power supply. This pin should have a 0.33 µF capacitor to
ground.
GND
Ground (Pin 2)
11
DI3
10
Tx3
Ground return pin is typically connected to the signal
ground pin of the EIA–232–E connector (Pin 7) as well as to
the logic power supply ground.
VSS GND
4
2
Vin
Rout =
I
VDD
Positive Power Supply (Pin 17)
This is the positive output of the on–chip voltage doubler
and the positive power supply input of the driver/receiver
sections of the device. This pin requires an external storage
capacitor to filter the 50% duty cycle voltage generated by
the charge pump.
Figure 1. Power–Off Source Resistance
VSS
Negative Power Supply (Pin 4)
DRIVERS
3V
DI1 – DI3
50%
0V
tf
tr
90%
Tx1 – Tx3
10%
VOH
C2+, C2–, C1–, C1+
Voltage Doubler and Inverter (Pins 1, 3, 18, 20)
VOL
These are the connections to the internal voltage doubler
and inverter, which generate the VDD and VSS voltages.
tPLH
tPHL
This is the negative output of the on–chip voltage doubler/
inverter and the negative power supply input of the driver/receiver sections of the device. This pin requires an external
storage capacitor to filter the 50% duty cycle voltage generated by the charge pump.
Rx1, Rx2, Rx3
Receive Data Input (Pins 5, 7, 9)
RECEIVERS
+3V
Rx1 – Rx3
50%
0V
tPHL
tPLH
VOH
90%
50%
10%
DO1 – DO3
tf
VOL
tr
These are the EIA–232–E receive signal inputs. A voltage
between + 3 and + 25 V is decoded as a space and causes
the corresponding DO pin to swing to ground (0 V). A voltage
between – 3 and – 25 V is decoded as a mark, and causes
the DO pin to swing up to VCC.
DO1, DO2, DO3
Data Output (Pins 16, 14, 12)
These are the receiver digital output pins, which swing
from VCC to GND. Each output pin is capable of driving one
LSTTL input load.
Figure 2. Switching Characteristics
DI1, DI2, DI3
Data Input (Pins 15, 13, 11)
These are the high impedance digital input pins to the drivers. Input voltage levels on these pins must be between VCC
and GND.
DRIVERS
3V
Tx1 – Tx3
–3V
tSLH
SLEW RATE (SR) =
3V
–3V
tSHL
– 3 V – (3 V)
3 V – ( – 3 V)
OR
tSLH
tSHL
Figure 3. Slew Rate Characterization
MOTOROLA
Tx1, Tx2, Tx3
Transmit Data Output (Pins 6, 8, 10)
These are the EIA–232–E transmit signal output pins,
which swing toward VDD and VSS. A logic 1 at a DI input
causes the corresponding Tx output to swing toward VSS. A
logic 0 causes the output to swing toward VDD. The actual
levels and slew rate achieved will depend on the output loading (RL ø CL).
MC145407
5
APPLICATIONS INFORMATION
ESD CONSIDERATIONS
ESD protection on IC devices that have their pins accessible to the outside world is essential. High static voltages
applied to the pins when someone touches them either directly or indirectly can cause damage to gate oxides and
transistor junctions by coupling a portion of the energy from
the I/O pin to the power supply busses of the IC. This coupling will usually occur through the internal ESD protection
diodes. The key to protecting the IC is to shunt as much of
the energy to ground as possible before it enters the IC. Figure 7 shows a technique which will clamp the ESD voltage at
approximately + 15 V using the MMBZ15VDLT1. Any residual voltage which appears on the supply pins is shunted to
ground through the 0.1 µF capacitors.
using 10 µF charge pump caps to illustrate its capability in
driving a companion MC145406 or MC145403. If there is no
requirement to support a second interface device and/or the
charge pump is not being used to power any other components, the MC145407 is capable of complying with
EIA–232–E and V.28 with smaller value charge pump caps.
Table 1 summarizes driver performance with both 2.2 µF and
1.0 µF charge pump caps.
Table 1. Typical Performance
2.2 µF
1.0 µF
Tx VOH @ 25°C
7.3
7.2
Tx VOH @ 85°C
7.2
7.1
Tx VOL @ 25°C
– 6.5
– 6.4
Parameter
Tx VOL @ 85°C
OPERATION WITH SMALLER VALUE CHARGE PUMP
CAPS
The MC145407 is characterized in the electrical tables
– 6.1
– 6.0
Tx Slew Rate @ 25°C
8.0 V/µs
8.0 V/µs
Tx Slew Rate @ 85°C
7.0 V/µs
7.0 V/µs
+5V
0.1 µF
20
DTMF
INPUT
CDSI RTLA
RDSI
20 kΩ
TIP
16
18
CFB
10
0.1 µF
VSS BYPASS
Xout
CD
8
1.0 µF
19
VCC C1 –
1
13
Tx1
DI2
ExI
LB
Rx1
0.1 µF 19
VAG
4
CDT
0.1 µF
CCDT
MODE
VSS
12
CDA
8
2
MC145407
14
Tx2
2
Rx2
DI3
10 kΩ
FB
6
5
10 kΩ
SQT
1.0 µF
C1 +
C2 +
15 DI1
16 DO1
3
11
TxD
5
RxD
MC145442
OR
RxA1
MC145443
17 +
C2 – VDD
3
3.579
MHz
0.1 µF
1.0 µF
10 kΩ
RING
VDD
Xin 9
DSI
600:600
*
0.1 µF
VDD BYPASS
6
VDD
17
TxA
15
RxA2
0.1 µF
RTx
10 µF 600
+
10 kΩ
1
TLA
0.1 µF
8
7
EIA–232–E
DB–25
CONNECTOR
3
7
9
Rx3
13
7
CCDA
0.1 µF
1.0 µF
VSS
4
GND
2
* Line protection circuit
Figure 4. 5 V, 300 Baud Modem with EIA–232–E Interface
MC145407
6
MOTOROLA
+5V
1 V
DD
2
Rx1
3
Tx1
4 Rx2
5
6
7
8
VCC 16
15
DO1
14
DI1
13
DO2
MC145406
12
Tx2
DI2
11
Rx3
DO3
10
Tx3
DI3
9
VSS
GND
1
C1+
C2+
2
10 µF
10 µF
20
10 µF
19
GND
VCC
18
3 C2–
C1–
4 V
17
VDD
SS
5
16
Rx1 MC145407 DO1
6
Tx1
DI1 15
7
14
Rx2
DO2
8 Tx2
13
DI2
9
12
Rx3
DO3
11
10
Tx3
DI3
10 µF
Figure 5. MC145406/MC145407 5 V Only Solution for up to Six EIA–232–E Drivers and Receivers
+5 V
+ 10 V
C2
C2+
GND
C2–
VSS
C4
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
C1+
0.1 µF
VCC
C1–
VDD
0.1 µF
Figure 6. Two Supply Configuration (MC145407 Generates VSS Only)
+5 V
MMBZ15VDLT × 6
C2
C2+
GND
C2–
VSS
C4
Rx1
Tx1
TO
CONNECTOR
Rx2
Tx2
Rx3
Tx3
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
C1+
C1
VCC
0.1 µF
C1–
VDD
DO1
C3
0.1 µF
DI1
DO2
DI2
DO3
DI3
Figure 7. ESD Protection Scheme
MOTOROLA
MC145407
7
PACKAGE DIMENSIONS
P SUFFIX
PLASTIC DIP
CASE 738–03
-A20
11
1
10
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEAD WHEN
FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE MOLD
FLASH.
B
C
-T-
L
K
SEATING
PLANE
M
E
G
N
F
J 20 PL
0.25 (0.010)
D 20 PL
0.25 (0.010)
M
T A
M
M
T
B
M
DIM
A
B
C
D
E
F
G
J
K
L
M
N
INCHES
MIN
MAX
1.010 1.070
0.240 0.260
0.150 0.180
0.015 0.022
0.050 BSC
0.050 0.070
0.100 BSC
0.008 0.015
0.110 0.140
0.300 BSC
15°
0°
0.020 0.040
MILLIMETERS
MIN
MAX
25.66 27.17
6.10
6.60
3.81
4.57
0.39
0.55
1.27 BSC
1.27
1.77
2.54 BSC
0.21
0.38
2.80
3.55
7.62 BSC
0°
15°
1.01
0.51
DW SUFFIX
SOG PACKAGE
CASE 751D–04
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.150
(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.
–A–
20
11
–B–
10X
P
0.010 (0.25)
1
M
B
M
10
20X
D
0.010 (0.25)
M
T A
B
S
J
S
F
R
C
–T–
18X
G
SEATING
PLANE
K
X 45 _
DIM
A
B
C
D
F
G
J
K
M
P
R
MILLIMETERS
MIN
MAX
12.65
12.95
7.40
7.60
2.35
2.65
0.35
0.49
0.50
0.90
1.27 BSC
0.25
0.32
0.10
0.25
0_
7_
10.05
10.55
0.25
0.75
INCHES
MIN
MAX
0.499
0.510
0.292
0.299
0.093
0.104
0.014
0.019
0.020
0.035
0.050 BSC
0.010
0.012
0.004
0.009
0_
7_
0.395
0.415
0.010
0.029
M
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.
Motorola and
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
INTERNET: http://Design–NET.com
HONG KONG: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park,
51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298
MC145407
8
◊
*MC145407/D*
MC145407/D
MOTOROLA