Philips Semiconductors Linear Products
Product specification
EIA-232-D/V.28 driver/receiver
MC145406
DESCRIPTION
PIN CONFIGURATION
The MC145406 is a silicon-gate CMOS IC that combines 3 drivers
and 3 receivers to fulfill the electrical specifications of standards
EIA-232-D and CCITT V.28. The drivers feature true TTL input
D and N Packages
V
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
DD
CC
compatibility, slew-rate limited output, 300Ω power-off source
impedance, and output typically switching to within 25% of the
supply rails. The receivers can handle up to +25V while presenting
3 to 7kΩ impedance. Hysteresis in the receiver aids reception of
noisy signals. By combining both drivers and receivers in a single
CMOS chip, the MC145406 provides efficient, low-power solutions
for EIA-232-D and V.28 applications.
R
R
RX
DO1
DI1
1
1
2
2
3
3
TX
D
D
D
RX
TX
DO2
DI2
RX
TX
V
DO3
R
DI3
APPLICATIONS
GND
SS
• Modem interface
NOTE:
D = Driver
R = Receiver
• Voice/data telephone interface
• Lap-top computers
• UART interface
• Maximum slew rate = 30V/µs
• Receivers
FEATURES
• +25V input voltage range over the full supply range
• 3 to 7kΩ input impedance
• Drivers
• +5 to +12V supply range
• 300Ω power-off source impedance
• Output current limiting
• TTL compatible
• Hysteresis on input switchpoint
• General
• Very low supply currents for long battery life
• Operation is independent of power supply sequencing
ORDERING INFORMATION
DESCRIPTION
TEMPERATURE RANGE
0 to +70°C
ORDER CODE
MC145406N
MC145406D
DWG #
0406C
0171B
16-Pin Plastic Dual In-Line (DIP) Package
16-Pin Small Outline Large (SOL) Package
0 to +70°C
ABSOLUTE MAXIMUM RATINGS
SYMBOL
PARAMETER
RATING
UNITS
V
V
Supply voltage
Supply voltage
Supply voltage
Input voltage range
-0.5 to +6.0
-0.5 to +13.5
+0.5 to -13.5
V
V
V
CC
DD
V
SS
RX inputs
DI inputs
1-3
(V - 15) to (V + 15)
V
IR
V
1-3
SS
DD
-0.5 to (V + 0.5)
CC
DC current per pin
+100
1.0
mA
W
P
D
Power dissipation (package)
Operating temperature range
Storage temperature range
°C
°C
T
A
0 to +70
T
STG
-65 to +150
Thermal impedance
N package
D package
80
105
θ
°C/W
JA
NOTE: 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 < V < V and GND < V
DI
DD
DO
< V . Also, the voltage at the RX pin should be constrained to +25V, and TX should be constrained to V < V
< V . Unused inputs
CC
SS
TX1-3
DD
must always be tied to an appropriate logic voltage level (e.g., GND or V for DI, and V or V for RX).
CC
SS
DD
467
August 31, 1994
853-1430 13721
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