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
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.
D and N Packages
VDD
VCC
2
15
DO1
TX1
3
14
DI1
RX2
4
13
DO2
TX2
5
RX3
6
TX3
7
VSS
• Modem interface
• Voice/data telephone interface
• Lap-top computers
• UART interface
16
RX1
APPLICATIONS
1
8
R
D
R
D
DI2
DO3
10
DI3
9
R
12
11
D
GND
NOTE:
D = Driver
R = Receiver
• Maximum slew rate = 30V/µs
• Receivers
• +25V input voltage range over the full supply range
• 3 to 7kΩ input impedance
• Hysteresis on input switchpoint
• General
• Very low supply currents for long battery life
• Operation is independent of power supply sequencing
FEATURES
• Drivers
• +5 to +12V supply range
• 300Ω power-off source impedance
• Output current limiting
• TTL compatible
ORDERING INFORMATION
DESCRIPTION
TEMPERATURE RANGE
ORDER CODE
DWG #
16-Pin Plastic Dual In-Line (DIP) Package
0 to +70°C
MC145406N
0406C
16-Pin Small Outline Large (SOL) Package
0 to +70°C
MC145406D
0171B
ABSOLUTE MAXIMUM RATINGS
SYMBOL
RATING
UNITS
VCC
Supply voltage
PARAMETER
-0.5 to +6.0
V
VDD
Supply voltage
-0.5 to +13.5
V
VSS
Supply voltage
+0.5 to -13.5
V
VIR
Input voltage range
RX1-3 inputs
DI1-3 inputs
(VSS - 15) to (VDD + 15)
-0.5 to (VCC + 0.5)
V
+100
mA
PD
DC current per pin
Power dissipation (package)
1.0
W
TA
Operating temperature range
0 to +70
TSTG
θJA
-65 to +150
80
105
Storage temperature range
Thermal impedance
N package
D package
°C
°C
°C/W
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 < VDI < VDD and GND < VDO
< VCC. Also, the voltage at the RX pin should be constrained to +25V, and TX should be constrained to VSS < VTX1-3 < VDD. Unused inputs
must always be tied to an appropriate logic voltage level (e.g., GND or VCC for DI, and VSS or VDD for RX).
August 31, 1994
467
853-1430 13721
