QUAD, ±16.5kV ESD Protected, 3.0V to 5.5V,
RS-485/RS-422 Receivers
ISL32173E, ISL32175E, ISL32177E, ISL32273E, ISL32275E,
ISL32277E
These Intersil devices are ±16.5kV IEC61000-4-2 ESD
protected, 3.0V to 5.5V powered, QUAD receivers for
Features
• IEC61000 ESD Protection (RS-485 Inputs) ±16.5kV
- Class 3 ESD on all Other Pins . . . . . .>8kV HBM
balanced communication using the RS-485 and RS-422
standards. Each receiver has low input currents
(±200μA), so it presents a 1/4 unit load to the RS-485
bus, and allows up to 128 receivers on the bus.
• Wide Supply Range. . . . . . . . . . . . . 3.0V to 5.5V
• Wide Common Mode Range . . . . . . . -7V to +12V
The ISL32173E, ISL32175E, ISL32177E are high data
rate receivers that operate at data rates up to 80Mbps.
Their 8ns maximum propagation delay skew (tolerance)
guarantees excellent part-to-part matching. The
ISL32273E, ISL32275E, ISL32277E are reduced supply
current versions that operate at data rates up to 20Mbps.
• Low Part-to-Part Propagation Delay
Tolerance . . . . . . . . . . . . . . . . . . . ±4ns (max)
• Specified for +125°C Operation
• Fail-Safe Open Rx Inputs
• 1/4 Unit Load Allows 128 Devices on the Bus
• Available in Industry Standard Pinouts (‘173/’175)
and a 4x4 QFN (ISL32X77E) with Added Features
Receiver outputs are tri-statable, and incorporate a hot
plug feature to keep them disabled during power up and
down. Versions are available with a common EN/EN (‘173
pinout), a two channel EN12/EN34 (‘175 pinout), or a
versatile individual channel enable (see Table 1)
• Logic Supply Pin (V ) Eases Operation in Mixed
L
Supply Systems (ISL32X77E)
• High Data Rates . . . . . . . . . up to 80M or 20Mbps
• Low Shutdown Supply Current . . . . . . . . . . 60μA
• Tri-statable Rx Outputs
A 26% smaller footprint is available with the ISL32177E
and ISL32277E QFN packages, and these two devices
also feature a logic supply pin (V ). The V supply sets
L
L
• 5V Tolerant Logic Inputs When V
CC
= 3.3V
the switching points of the enable inputs, and the
receiver outputs’ V , to levels compatible with a lower
OH
supply voltage in mixed voltage systems. Individual
channel and group enable pins increase the ISL32177E
and ISL32277E’s flexibility.
Applications*(see page 19)
• Telecom Equipment
• Motor Controllers/Encoders
• Programmable Logic Controllers
• Industrial/Process Control Networks
ISL32177E Part-to-Part Prop
Delay Variability
ISL3217XE Data Rate and V
Performance
L
V
= 3.3V, +25°C
CC
# of DEVICES = 270
V
= 3.3V
80Mbps
CC
1
0
A - B
-1
3.0
2.5
2.0
1.5
1.0
0.5
0
V
= 2.5V
L
V
= 1.8V
L
V
= 1.6V
L
-0.5
TIME (4ns/DIV)
RECEIVER PROPAGATION DELAY (ns)
November 19, 2009
FN7529.0
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Copyright Intersil Americas Inc. 2009. All Rights Reserved
1
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