Maxim MAX562EAI, MAX562CWI, MAX562C-D, MAX562EWI Datasheet
19-0144; Rev. 0; 9/93
_______________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).
________________________Applications
Palmtop, Notebook, and Subnotebook
Computers
Peripherals
Battery-Powered Equipment
____________________________Features
♦ 230kbps Data Rate, LapLink™ Compatible
♦ Operates from a 2.7V to 5.25V Supply
♦ Designed for EIA/TIA-562 and EIA/TIA-232 Applications
♦ Guaranteed 4.0V/µs Slew Rate
♦ 3 Drivers, 5 Receivers
♦ Flow Through Pinout
♦ Low-Power Shutdown and Keep-Awake Modes
♦ Low-Cost, Surface-Mount External Capacitors
______________Ordering Information
* Contact factory for dice specifications.
MAX562
Complete 230kbps, 2.7V to 5.25V
Serial Interface for Notebook Computers
________________________________________________________________
Maxim Integrated Products
1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
V
CC
GND
VC2+
C2R1
IN
SHDN
R2
IN
R3
IN
R4
IN
R5
IN
T1
OUT
T2
OUT
T3
OUT
EN
T3
IN
T2
IN
T1
IN
R5
OUT
R4
OUT
R3
OUT
R2
OUT
R1
OUT
C1A-
C1B-
C1B+
C1A+
V+
MAX562
SO/SSOP
TOP VIEW
__________________Pin Configuration
T1
T2
T3
R1
R2
R3
R4
R5
5k
5k
5k
5k
5k
GND
19
SHDN
R5
IN
R4
IN
R3
IN
R2
IN
R1
IN
T3
OUT
T2
OUT
T1
OUT
R5
OUT
R4
OUT
R3
OUT
R2
OUT
R1
OUT
EN
T3
IN
T2
IN
T1
IN
VOLTAGE
DOUBLER/TRIPLER
VOLTAGE
INVERTER
20
21
22
23
16
17
18
26
28
453
2
1
25
12
24
11
13
6
7
8
9
10
14
27
15
C2-
C2+
V-
C1A C1B
C1A+ C1A- C1B+ C1B-
V
CC
V+
C3 0.68µF
C4 0.33µF
0.33µF
+2.7V TO
+5.25V
INPUT
0.33µF
0.33µF 0.33µF
CMOS
INPUTS
CMOS
OUTPUTS
EIA/TIA
-562
INPUTS
EIA/TIA
-562
OUTPUTS
C2
MAX562
__________Typical Operating Circuit
Call toll free 1-800-998-8800 for free samples or literature.
PART TEMP. RANGE PIN-PACKAGE
MAX562CWI 0°C to +70°C 28 SO
MAX562CAI 0°C to +70°C 28 SSOP
MAX562C/D 0°C to +70°C Dice*
MAX562EWI -40°C to +85°C 28 SO
MAX562EAI -40°C to +85°C 28 SSOP
™ LapLink is a registered trademark of Traveling Software, Inc.
MAX562
Complete 230kbps, 2.7V to 5.25V
Serial Interface for Notebook Computers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
VCC......................................................................... -0.3V to +6V
V+ ................................................................ (V
CC
- 0.3V) to +6V
V-............................................................................ +0.3V to -6V
C1A+, C1B+.................................................. -6V to (V+ + 0.3V)
C1A-, C1B-, C2+........................................ -0.3V to (V+ + 0.3V)
C2-.................................................................. (V- - 0.3V) to +6V
Input Voltages
T
IN
, EN,
SHDN
........................................ -0.3V to (VCC+ 0.3V)
R
IN
....................................................................................±25V
Output Voltages
T
OUT
............................................................................... ±15V
R
OUT
...................................................... -0.3V to (VCC+ 0.3V)
Short-Circuit Duration
T
OUT
to GND........................................................ Continuous
R
OUT
to GND, VCC................................................ Continuous
Continuous Power Dissipation (T
A
= +70°C)
SO (derate 12.50mW/°C above +70°C).................. 1000mW
SSOP (derate 9.52mW/°C above +70°C) ................. 762mW
Operating Temperature Ranges:
MAX562C_ _ ..................................................... 0°C to +70°C
MAX562E_ _ .................................................. -40°C to +85°C
Storage Temperature Range........................... -65°C to +160°C
Lead Temperature (soldering, 10sec)........................... +300°C
ELECTRICAL CHARACTERISTICS
(VCC= 2.7V to 5.25V, C1A = C1B = C2 = C4 = 0.33µF, C3 = 0.68µF, TA= T
MIN
to T
MAX
, unless otherwise noted.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
PARAMETER MIN TYP MAX UNITS
Input Voltage Operating Range ±25 V
Input Threshold Low 0.8 V
Input Threshold High 2.4 V
Input Hysteresis
No hysteresis when
SHDN
= 0V
0.3 V
Input Resistance -15V < VIN< 15V 3 5 7 kΩ
Output Voltage Swing All transmitter outputs loaded with 3kΩ to GND ±3.7 ±4.5 ±6.0 V
VCC= 2.7V to 3.6V 0.6
Input Logic Threshold Low
TIN, EN,
SHDN
VCC= 5.0V +5%, -10% 0.8
V
VCC= 2.7V to 3.6V 1.8
Input Logic Threshold High
TIN, EN,
SHDN
VCC= 5.0V +5%, -10% 3.0
V
Output Voltage Low I
OUT
= 1.6mA 0.4 V
Output Voltage High I
OUT
= -1.0mA V
Output Leakage Current
EN = GND, 0V ≤ R
OUT
≤ V
CC
0.05 ±10 µA
Operating Supply Voltage 2.7 5.25 V
No load 20 33
VCCPower-Supply Current VCC= 3.3V
All outputs loaded 3kΩ 24
mA
EN = VCC,
SHDN
= GND, TA= +25°C
45 130 µA
Shutdown Supply Current
SHDN
= EN = GND, TA= +25°C
1 50 µA
Output Leakage Current ±10 µA
Output Resistance VCC= V+ = V- = 0V, V
OUT
= ±2V 300 Ω
Output Short-Circuit Current V
OUT
= 0V ±60 mA
Shutdown Supply Current with
Receivers Active
VCC-0.5
CONDITIONS
EIA/TIA-562 TRANSMITTERS
EIA/TIA-562 RECEIVERS
POWER SUPPLY
MAX562
Complete 230kbps, 2.7V to 5.25V
Serial Interface for Notebook Computers
_______________________________________________________________________________________ 3
AC CHARACTERISTICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
Receiver Propagation Delay,
Normal Operation
250 500
ns
CL= 150pF,
SHDN
= GND
Figure 2
3000 4000
Receiver Propagation Delay,
Keep-Awake Mode
2000 3000
ns
Receiver-Output Enable Time Figure 4 100 250 ns
Receiver-Output Disable Time Figure 4 250 500 ns
Data Rate
1000pF || 3kΩ load each transmitter output,
150pF load each receiver output
230.4 280.0 kbits/sec
Transmitter Slew Rate
CL= 50pF to 2500pF,
RL= 3kΩ to 7kΩ. Measured from +3V to -3V, or
-3V to +3V
4 6 30 V/µs
CL= 2500pF 0.22 3.1
Transmitter Rise/Fall Time
RL= 3kΩ measured
from +3.3V to -3.3V
or -3.3V to +3.3V
CL= 1000pF 0.22 2.1
µs
t
PHLT
900 1700
Transmitter Propagation Delay
2500pF || 3kΩ load,
Figure 1
t
PLHT
1000 1700
ns
Transmitter-Output Enable Time 100 µs
Transmitter-Output Disable Time Figure 3 600 ns
CL= 150pF,
SHDN
= VCCFigure 2
t
PHLR
100 250
t
ET
t
DT
t
PLHR
t
PHLS
t
PLHS
t
ER
t
DR
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