ISL32173E Datasheet, PDF (1/22 Pages) Intersil Corporation – QUAD, ±16.5kV ESD Protected, 3.0V to 5.5V, RS-485/RS-422 Receivers

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
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.
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.
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)
A 26% smaller footprint is available with the ISL32177E
and ISL32277E QFN packages, and these two devices
also feature a logic supply pin (V_L). The V_L supply sets
the switching points of the enable inputs, and the
receiver outputs’ V_OH, to levels compatible with a lower
supply voltage in mixed voltage systems. Individual
channel and group enable pins increase the ISL32177E
and ISL32277E’s flexibility.
Features
• IEC61000 ESD Protection (RS-485 Inputs) ±16.5kV
- Class 3 ESD on all Other Pins . . . . . .>8kV HBM
• Wide Supply Range. . . . . . . . . . . . . 3.0V to 5.5V
• Wide Common Mode Range . . . . . . . -7V to +12V
• 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
• Logic Supply Pin (V_L) Eases Operation in Mixed
Supply Systems (ISL32X77E)
• High Data Rates . . . . . . . . . up to 80M or 20Mbps
• Low Shutdown Supply Current . . . . . . . . . . 60μA
• Tri-statable Rx Outputs
• 5V Tolerant Logic Inputs When V_CC = 3.3V
Applications*(see page 19)
• Telecom Equipment
• Motor Controllers/Encoders
• Programmable Logic Controllers
• Industrial/Process Control Networks
ISL32177E Part-to-Part Prop
Delay Variability
V_CC = 3.3V, +25°C
# of DEVICES = 270
ISL3217XE Data Rate and V_L
Performance
1
0
A-B
-1
80Mbps
V_CC = 3.3V
RECEIVER PROPAGATION DELAY (ns)
3.0
2.5
2.0
1.5
1.0
0.5
0
-0.5
V_L = 2.5V
V_L = 1.8V
V_L = 1.6V
TIME (4ns/DIV)
November 19, 2009
FN7529.0
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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