MAX3189EEUT+T Maxim Integrated Products, MAX3189EEUT+T Datasheet - Page 4

• Manufacturer Part Number: MAX3189EEUT+T
• Description: IC RS-232 TRANSMITTER SOT23-6
• Manufacturer: Maxim Integrated Products
• Type: Transmitterr

Specifications of MAX3189EEUT+T

• Number Of Drivers/receivers: 1/0
• Protocol: RS232
• Voltage - Supply: 4.5 V ~ 6 V
• Mounting Type: Surface Mount
• Package / Case: SOT-23-6
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

±15kV ESD-Protected, 1Mbps, 1µA
RS-232 Transmitters in SOT23-6
The MAX3188E/MAX3189E are EIA/TIA-232 transmitters
that convert CMOS/TTL logic levels to RS-232 signals.
They operate on ±4.5V to ±6V supplies and feature
enhanced electrostatic discharge protection (see ESD
Protection). The MAX3188E guarantees a 250kbps data
rate, and the MAX3189E guarantees a 1Mbps data rate
with worst-case loads of 3kΩ in parallel with 1000pF.
The MAX3188E/MAX3189E invert the TOUT signal relative
to TIN (standard RS-232). The transmitter input does
not have a pull-up resistor and should be connected to
GND if unused.
4
(V
CC
PIN
1
2
3
4
5
6
_______________________________________________________________________________________
= +5.4V, V
NAME
SHDN
TOUT
GND
V
V
TIN
CC
EE
EE
= -5.4V, R
SHDN
TOUT
Active-Low Shutdown. Pull low to
reduce the supply current and to force
TOUT into a high-impedance state.
Ground
TTL/CMOS Transmitter Input
RS-232 Transmitter Output
Negative Supply Voltage
Positive Supply Voltage
Detailed Description
L
= 3kΩ, T
SHUTDOWN WAVEFORM
TRANSMITTER OUTPUT
Pin Description
FUNCTION
MAX3188E
1µs/div
A
= +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
MAX3188E/9E toc07
C
L
= 150pF
+2V
0
+5V
0
-5V
SHDN
TOUT
The MAX3188E/MAX3189E feature a shutdown input.
Drive SHDN low to reduce the supply current to 1µA
(max). Shutdown also forces TOUT into a high-imped-
ance state, allowing the signal line to be safely con-
trolled by other transmitters. Drive SHDN high for
normal operation.
As with all Maxim devices, ESD protection structures are
incorporated on all pins to protect against ESD encoun-
tered during handling and assembly. The MAX3188E/
MAX3189Es’ transmitter output has extra protection
against static electricity. Maxim has developed state-of-
the-art structures enabling this pin to withstand ESD up
Figure 1. Transmitter Propagation-Delay Timing
TOUT
TIN
+5V
-5V
V
V
SHUTDOWN WAVEFORM
IH
IL
TRANSMITTER OUTPUT
MAX3189E
50%
1µs/div
MAX3188E/9E toc08
C
L
50%
= 150pF
t
PLH
t
PHL
50%
+2V
0
+5V
0
-5V
ESD Protection
Shutdown
50%