19-0144; Rev. 0; 9/93
Complete 230kbps, 2.7V to 5.25V
Serial Interface for Notebook Computers
_______________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 guaran-
teed 4V/碌s 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 dis-
abled but all receivers are active, allowing unidirection-
al 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 pack-
age, and in a smaller footprint shrink small-outline
package (SSOP).
____________________________Features
o
230kbps Data Rate, LapLink鈩?Compatible
o
Operates from a 2.7V to 5.25V Supply
o
Designed for EIA/TIA-562 and EIA/TIA-232 Applications
o
Guaranteed 4.0V/碌s 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
MAX562
______________Ordering Information
PART
MAX562CWI
MAX562CAI
MAX562C/D
MAX562EWI
MAX562EAI
TEMP. RANGE
0掳C to +70掳C
0掳C to +70掳C
0掳C to +70掳C
-40掳C to +85掳C
-40掳C to +85掳C
PIN-PACKAGE
28 SO
28 SSOP
Dice*
28 SO
28 SSOP
________________________Applications
Palmtop, Notebook, and Subnotebook
Computers
Peripherals
Battery-Powered Equipment
__________Typical Operating Circuit
0.33碌F
+2.7V TO
+5.25V
0.33碌F
2 C1A 5
3 C1B 4
C1A+ C1A-
C1B+ C1B- 28
1
VOLTAGE
V
CC
V+
0.33碌F
DOUBLER/TRIPLER
INPUT
25
C2+
VOLTAGE
26
C2
V-
INVERTER
24 C2-
0.33碌F
T1
IN
CMOS
INPUTS
T2
IN
T3
IN
R1
OUT
R2
OUT
CMOS
OUTPUTS
R3
OUT
R4
OUT
R5
OUT
EN
11
12
13
6
7
8
9
10
14
T1
T2
T3
R1
5k
R2
5k
R3
R4
5k
R5
5k
GND
27
19
15
21
5k
20
22
R2
IN
R3
IN
R4
IN
R5
IN
SHDN
EIA/TIA
-562
INPUTS
18
17
16
23
* Contact factory for dice specifications.
__________________Pin Configuration
MAX562
TOP VIEW
C3
C4
T1
OUT
T2
OUT
T3
OUT
R1
IN
EIA/TIA
-562
OUTPUTS
0.68碌F
V
CC
1
0.33碌F
C1A+
2
C1B+
3
C1B-
4
C1A-
5
R1
OUT
6
R2
OUT
7
R3
OUT
8
R4
OUT
9
R5
OUT
10
T1
IN
11
T2
IN
12
T3
IN
13
28
V+
27
GND
26
V-
25
C2+
MAX562
24
C2-
23
R1
IN
22
R2
IN
21
R3
IN
20
R4
IN
19
R5
IN
18
T1
OUT
17
T2
OUT
16
T3
OUT
15
SHDN
EN
14
SO/SSOP
鈩?LapLink is a registered trademark of Traveling Software, Inc.
________________________________________________________________
Maxim Integrated Products
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