19-0144; Rev. 0; 9/93
Complete 230kbps, 2.7V to 5.25V
Serial Interface for Notebook Computers
________________________Applications
Battery-Powered Equipment
__________Typical Operating Circuit
0.33µF
CMOS
INPUTS
T2IN
T3IN
R1OUT
12
13
6
18
T1
17
T2
16
T3
23
R1
CMOS
OUTPUTS
R3OUT
R4OUT
R5OUT
EN
7
22
R2
5k
8
9
R3
21
5k
20
R4
5k
10
14
19
R5
5k
GND
27
o Guaranteed 4.0V/µs Slew Rate
o 3 Drivers, 5 Receivers
o Flow Through Pinout
o Low-Power Shutdown and Keep-Awake Modes
o Low-Cost, Surface-Mount External Capacitors
______________Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
28 SO
28 SSOP
Dice*
28 SO
28 SSOP
* Contact factory for dice specifications.
T1OUT
T2OUT
EIA/TIA
-562
OUTPUTS
15
28 V+
V CC 1
C1A+ 2
27 GND
26 V-
C1B- 4
25 C2+
C1A- 5
R1 OUT 6
T3OUT
MAX562
R2 OUT 7
R1IN
24 C223 R1 IN
22 R2 IN
R3 OUT 8
EIA/TIA
-562
INPUTS
R4IN
R5IN
SHDN
21 R3 IN
R4 OUT 9
R2IN
R3IN
TOP VIEW
C1B+ 3
5k
R2OUT
o Designed for EIA/TIA-562 and EIA/TIA-232 Applications
__________________Pin Configuration
MAX562
2 C1A 5
3 C1B 4
C1B+ C1B- 28
1 C1A+ C1AVOLTAGE
VCC
V+
0.33µF
C3
0.68µF
DOUBLER/TRIPLER
INPUT
25
C2+
VOLTAGE
26
C2
VINVERTER
24 C20.33µF
C4
0.33µF
+2.7V TO
+5.25V
T1IN
o Operates from a 2.7V to 5.25V Supply
MAX562CAI
MAX562C/D
MAX562EWI
MAX562EAI
Peripherals
11
o 230kbps Data Rate, LapLink™ Compatible
MAX562CWI
Palmtop, Notebook, and Subnotebook
Computers
0.33µF
____________________________Features
20 R4 IN
R5 OUT 10
19 R5 IN
T1 IN 11
18 T1 OUT
T2 IN 12
17 T2 OUT
T3 IN 13
16 T3 OUT
EN 14
15 SHDN
SO/SSOP
™ LapLink is a registered trademark of Traveling Software, Inc.
________________________________________________________________ Maxim Integrated Products
Call toll free 1-800-998-8800 for free samples or literature.
1
MAX562
_______________General Description
The MAX562 is designed specifically for notebook and
palmtop computers that need to transfer data quickly.
It runs at data rates up to 230kbps, and has a guaranteed 4V/µs slew rate. This device meets the new
EIA/TIA-562 standard that guarantees compatibility with
RS-232 interfaces.
The MAX562 has low-power shutdown and keep-awake
modes. In keep-awake mode, the transmitters are disabled but all receivers are active, allowing unidirectional communication. In shutdown mode, the entire chip is
disabled and all outputs are in a high-impedance state.
The MAX562 is available in a standard 28-pin SO package, and in a smaller footprint shrink small-outline
package (SSOP).
