15 kV ESD Protected
Dual RS-422 Transceiver
Data Sheet
ADM4168E
FEATURES
FUNCTIONAL BLOCK DIAGRAM
V
CC
Dual transceivers for RS-422
ESD protection on bus input/output pins
15 kV human body model (HBM)
8 kV IEC 61000-4-2, contact discharge
8 kV IEC 61000-4-2, air discharge
Complies with TIA/EIA-422-B and ITU-T recommendation V.11
Open-circuit fail-safe
Suitable for 5 V power supply applications
Low supply current operation: 9 mA maximum
Low driver output skew
ADM4168E
DI1
Y1
Z1
B1
A1
R1
D1
RO1
DE1
DE2
Z2
RO2
A2
Receiver input impedance: 30 kΩ
R2
D2
B2
Y2
Receiver common-mode range: −7 V to +7 V
Power-up/power-down without glitches
16-pin TSSOP package
DI2
GND
Operating temperature range: −40°C to +85°C
Figure 1.
APPLICATIONS
RS-422 interfaces
High data rate motor control
Single-ended-to-differential signal conversion
Point-to-point and multidrop transmission systems
GENERAL DESCRIPTION
The ADM4168E has dual RS-422 transceivers suitable for
high speed communication on point-to-point and multidrop
transmission lines. The ADM4168E is designed for balanced
transmission lines and complies with TIA/EIA-422-B.
The receivers of the ADM4168E contain a fail-safe feature that
results in a logic high output state if the inputs are unconnected
(floating).
The ADM4168E is fully specified over the commercial and
industrial temperature ranges and is available in a 16-pin
TSSOP package.
The differential driver outputs and receiver inputs feature electro-
static discharge circuitry that provides protection up to 15 kV
HBM and 8 kV IEC 61000-4-2 (contact and air discharge).
The ADM4168E operates from a single 5 V power supply.
Excessive power dissipation caused by bus contention or output
shorting is prevented by short-circuit protection circuitry. Short-
circuit protection circuits limit the maximum output current to
150 mA during fault conditions.
Rev. 0
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