ML145583
3.3 Volt Only Driver/Receiver with
an Integrated Standby Mode
RS 232/EIA–232–E and CCITT V.28
Legacy Device:
Motorola MC145583
The ML145583 is a CMOS transceiver composed of three drivers and
five receivers that fulfills the electrical specifications of EIA–232–E,
EIA–562, and CCITT V while operating from a single + 3.3 or + 5.0 V
.28
power supply. This transceiver is a high–performance, low–power con-
sumption device that is equipped with a standby function.
A voltage tripler and inverter converts the + 3.3 V to ± 8.8 V or a volt-
,
age doubler and inverter converts the + 5.0 V to ± 8.8 V This is accom-
.
plished through an on–chip 40 kHz oscillator and five inexpensive exter-
nal capacitors.
FEATURES
Drivers:
• ± 5 V Minimum Output Swing at 3.3 or 5.0 V Power Supply
• 300
Ω
Power–Off Impedance
• Output Current Limiting
• Three–State Outputs During Standby Mode
C5+
28
1
SOIC 28W = -7P
SOG PACKAGE
CASE 751F
PACKAGE
SOIC 28W
MOTOROLA
MC145583DW
LANSDALE
ML145583-7P
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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
RING
MONITOR
CIRCUIT
(INVERTING)
28
27
26
25
24
23
22
21
20
19
18
17
16
15
C2+
VCC
C2–
C1+
C1–
VDD
DO1
DO2
DO3
DI1
DO4
DI2
DO5
DI3
Receivers:
• ± 25 V Input Range
• 3 to 7 kΩ Input Impedance
• 0.8 V Hysteresis for Enhanced Noise Immunity
• Three–State Outputs During Standby Mode
Ring Monitor Circuit:
• Invert the Input Level on Rx1 to Logic Output Level on RIMON at
Standby Mode
GND
C5–
RIMON
VSS
STB
Rx1
Rx2
Rx3
Tx1
Rx4
Tx2
Rx5
Tx3
Page 1 of 7
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Issue A
LANSDALE [ LANSDALE SEMICONDUCTOR INC. ]
