MAX3187CAX-T Maxim Integrated, MAX3187CAX-T Datasheet - Page 7

• Manufacturer Part Number: MAX3187CAX-T
• Description: RS-232 Interface IC
• Manufacturer: Maxim Integrated
• Series: MAX3187r

Specifications of MAX3187CAX-T

• Data Rate: 230 Kbps
• Operating Supply Voltage: 5 V, 12 V
• Supply Current: 3 mA, 1 mA
• Operating Temperature Range: 0 C to + 70 C
• Mounting Style: SMD/SMT
• Package / Case: SSOP-36
• Function: Transceiver
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Number Of Drivers: 6
• Number Of I/os: 32
• Number Of Receivers: 10
• Propagation Delay Time Ns: 4 us
• Shutdown: No

The Machine Model for ESD testing uses a 200pF stor-
age capacitor and zero-discharge resistance. It mimics
the stress caused by handling during manufacturing
and assembly. Of course, all pins (not just RS-232
inputs and outputs) require this protection during man-
ufacturing. Therefore, the Machine Model is less rele-
vant to the I/O ports than are the Human Body Model
and IEC 1000-4-2.
Use proper layout to ensure other devices on your
board are not damaged in an ESD strike. Currents as
high as 60A can instantaneously pass into ground, so
be sure to minimize the ground-lead return path to the
power supply. A separate return path to the power sup-
ply is recommend. Trace widths should be greater than
40 mils. Bypass V
tors as close to the part as possible to ensure maxi-
mum ESD protection.
Connect any unused transmitter inputs to GND or V
The MAX3187 is not sensitive to power-supply
sequencing, and therefore requires no external protec-
tion diodes.
TRANSISTOR COUNT: 419
___________________Chip Information
Dual RS-232 Serial Port for Motherboards/Desktops
±15kV ESD-Protected, EMC-Compliant, 230kbps,
Applications Information
CC
_______________________________________________________________________________________
, V
DD
, and V
SS
with 0.1µF capaci-
Machine Model
CC
.
__________Typical Operating Circuit
0.1 F
TTL/CMOS
LOGIC
I/O
GND
+5V
V
CC
MAX3187
T1
T2
T3
T4
T5
T6
R10
R1
R2
R3
R4
R5
R6
R7
R8
R9
-12V
+12V
V
V
DD
SS
INTERCONNECTING
0.1 F
0.1 F
RS-232
CABLE
V+
V+
V-
TX
0.1 F
GND
+5V
V CC
MAX3186
R1
R2
R3
T1
T3
T4
T5
T2
MOUSE
+12V
-12V
V DD
V
SS
TTL/CMOS
LOGIC
I/O
0.1 F
0.1 F
7