MAX563 Maxim, MAX563 Datasheet
MAX563
Manufacturer Part Number
MAX563
Description
+3.3V-Powered / EIA/TIA-562 Dual Transceiver with Receivers Active in Shutdown
Manufacturer
Maxim
Datasheet
1.MAX563.pdf
(8 pages)
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The MAX563 is a +3.3V-powered EIA/TIA-562 transceiver
with two transmitters and two receivers. Because it imple-
ments the EIA/TIA-562 standard, the MAX563 communi-
cates with RS-232 transceivers, yet consumes far less
power; this makes it ideal for battery-powered, hand-held
computers. And, the MAX563 guarantees a 116kbps data
rate while maintaining ±3.7V EIA/TIA-562 signal levels,
which makes it compatible with LapLink™ software.
An on-board charge pump converts the +3.3V supply to
the ±6.6V needed to produce the EIA/TIA-562 output volt-
age levels. Four 0.1µF charge-pump capacitors and a
bypass capacitor of similar size are the only external com-
ponents required.
When the MAX563’s charge pumps and transmitters are
shut down to save power, the receivers remain active to
continuously monitor signals from external devices (for
example, ring indicator from modems). The two receivers’
outputs can be enabled and disabled independently of the
shutdown function to allow two ports—generally of different
types—to be wire-OR connected at the UART.
________________________Applications
19-0198; Rev 0; 10/93
™ LapLink is a registered trademark of Traveling Software, Inc.
Call toll free 1-800-998-8800 for free samples or literature.
__________Typical Operating Circuit
_______________General Description
OUTPUTS
INPUTS
CMOS
CMOS
+3.3V-Powered, EIA/TIA-562 Dual Transceiver
Handiterminals
Battery-Powered Equipment
Bar-Code Readers
Notebook and Palmtop Computers
C1
C2
12
11
10
13
4
6
1
2
5
C2+
C2-
T1
T2
R1
C1+
C1-
R2
EN
________________________________________________________________ Maxim Integrated Products
IN
IN
OUT
OUT
400k
400k
VOLTAGE DOUBLER
VOLTAGE INVERTER
V
V
+3.3V
GND
CC
CC
V CC
17
5k
5k
with Receivers Active in Shutdown
C3
T2
T1
SHDN
R2
R1
OUT
OUT
V+
V-
IN
IN
ALL CAPACITORS 0.1µF
14
9
18
3
15
7
8
+6.6V
-6.6V
ON/OFF
C4
RS-562
OUTPUTS
RS-562/RS-232
INPUTS
____________________________Features
* Dice are specified at T
MAX563CPN
MAX563CWN
MAX563C/D
__________________Pin Configuration
______________Ordering Information
Guaranteed Interoperability with RS-232
Operates from a Single +3.0V to +3.6V Supply
2 Drivers, 2 Receivers
Receivers Active in Shutdown Mode
Low-Power Shutdown: 10µA Max
Small Package—18-Pin Wide SO
Three-State TTL/CMOS Receiver Outputs
116kbps Guaranteed Data Rate
PART
TOP VIEW
T2
R2
C1+
C2+
OUT
C1-
C2-
EN
V+
V-
IN
1
2
3
4
5
6
7
8
9
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
A
= +25°C.
DIP/SO
MAX563
18
17
16
15
14
13
12
11
10
PIN-PACKAGE
18 Plastic DIP
18 Wide SO
Dice *
T1
T2
SHDN
V
GND
T1
R1
R1
R2
CC
OUT
IN
IN
IN
OUT
OUT
1
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