ML145406 Datasheet, PDF (1/10 Pages) LANSDALE Semiconductor Inc. – Driver/Receiver EIA 232-E and CCITT V.28 (Formerly RS-232-D)

ML145406
Driver/Receiver
EIA 232–E and CCITT V.28
(Formerly RS–232–D)
Legacy Device: Motorola MC145406
The ML145406 is a silicon–gate CMOS IC that combines three drivers and
three receivers to fulfill the electrical specifications of standards EIA 232–E
and CCITT V.28. The drivers feature true TTL input compatibility,
slew–rate–limited output, 300–Ω power–off source impedance, and output typ-
ically switching to within 25% of the supply rails. The receivers can handle up
to ±25 V while presenting 3 to 7 kΩ impedance. Hysteresis in the receivers
aids reception of noisy signals. By combining both drivers and receivers in a
single CMOS chip, the ML145406 provides efficient, low–power solutions for
EIA 232–E and V.28 applications.
This device offers the following performance features:
• Operating Temperature Range = TA –40° to +85°C
Drivers
• ± 5 V to ±12 V Supply Range
• 300–Ω Power–Off Source Impedance
• Output Current Limiting
• TTL Compatible
• Maximum Slew Rate = 30 V/µs
Receivers
• ± 25 V Input Voltage Range When VDD = 12 V, VSS = – 12 V
• 3 to 7 kΩ Input Impedance
• Hysteresis on Input Switchpoint
BLOCK DIAGRAM
VDD
*
15 k
Rx
5.4 k
RECEIVER
VDD
VCC
+
–
VSS
VCC
DO
1.0 V
300
Tx
1.8 V
HYSTERESIS
VDD
DRIVER
VCC
LEVEL
SHIFT
+
DI
– 1.4 V
VSS
*Protection circuit
Page 1 of 10
www.lansdale.com
16
1
P DIP 16 = EP
PLASTIC
CASE 648
16
1
SO 16W = -5P
SOG
CASE 751G
CROSS REFERENCE/ORDERING INFORMATION
PACKAGE
MOTOROLA
LANSDALE
P DIP 16
SO 16W
MC145406P ML145406EP
MC145406DW ML145406-6P
Note: Lansdale lead free (Pb) product, as it
becomes available, will be identified by a part
number prefix change from ML to MLE.
PIN ASSIGNMENT
VDD 1
16 ^VCC
2
Rx1
R
15
DO1
3
Tx1
D ¹⁴ DI1
4
Rx2
R
13
DO2
Tx2 ⁵
D ¹² DI2
6
Rx3
R
11 _DO3
7
Tx3
D ¹⁰ DI3
VSS 8
9 ^GND
D = DRIVER
R = RECEIVER
Issue A