MAX13450E_1011 Datasheet, PDF (11/17 Pages) Maxim Integrated Products – RS-485 Transceivers with Integrated 100Ω/120Ω Termination Resistors

TOP VIEW
DE 1
RE 2
DI 3
VCC 4
TERM 5
VL 6
RO 7
RS-485 Transceivers with Integrated
100Ω/120Ω Termination Resistors
Pin Configurations
MAX13450E
*EP
TSSOP
14 SRL
13 TERM100
12 Z
11 GND
10 Y
9B
8A
TOP VIEW
DE 1
RE 2
DI 3
VCC 4
TERM 5
VL 6
RO 7
*CONNECT EP TO GND
MAX13451E
*EP
TSSOP
14 SRL
13 TERM100
12 B
11 GND
10 A
9 FAULT
8 INV
PIN
MAX13450E MAX13451E
1
1
2
2
3
3
4
4
5
5
6
6
7
—
—
7
8
—
—
10
9
—
—
12
NAME
DE
RE
DI
VCC
TERM
VL
RO
RO
A
A
B
B
Pin Description
FUNCTION
Driver-Output Enable. Drive DE low to put the driver output in three-state. Drive DE
high to enable the driver. DE is referenced to VL.
Receiver-Output Enable. Drive RE low to enable the RO. Drive RE high to disable
the RO output and put the RO output in a high-impedance state. RE is referenced
to VL.
Driver Input. Drive DI low to force the noninverting output low and the inverting
output high. Drive DI high to force the noninverting output high and inverting out-
put low. DI is referenced to VL.
Power-Supply Voltage. Bypass VCC to GND with a 0.1FF ceramic capacitor
placed as close as possible to the device.
Active-Low Termination Resistor Enable. Drive TERM low to enable the internal ter-
mination resistor. TERM is referenced to VL.
Logic Supply Voltage. Bypass VL to GND with a 0.1FF ceramic capacitor placed
as close as possible to the device.
Receiver Output. When receiver is enabled and VA - VB R -50mV, RO is high. If
VA - VB P -200mV, RO is low. RO is referenced to VL.
Receiver Output. When INV is low, receiver is enabled and VA - VB R -50mV, RO is
high. If VA - VB P -200mV, RO is low. When INV is high, receiver is enabled and
VA - VB R -50mV, RO is low. If VA - VB P -200mV, RO is high. RO is referenced to VL.
Noninverting Receiver Input
If INV is low, A is a noninverting receiver input and a noninverting driver output. If
INV is high, A is an inverting receiver input and an inverting driver output.
Inverting Receiver Input
If INV is low, B is an inverting receiver input and an inverting driver output. If INV
is high, B is a noninverting receiver input and a noninverting driver output.
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