ISL32172E Datasheet, PDF (1/20 Pages) Intersil Corporation – QUAD, ±16.5kV ESD Protected, 3.0V to 5.5V, Low Power, RS-422 Transmitters

ISL32172E, ISL32272E, ISL32372E, ISL32174E,
®
ISL32274E, ISL32374E, ISL32179E
Data Sheet
December 16, 2008
FN6824.0
QUAD, ±16.5kV ESD Protected, 3.0V
to 5.5V, Low Power, RS-422 Transmitters
The Intersil ISL32x7xE are ±16.5kV IEC61000-4-2 ESD
Protected, 3.0V to 5.5V powered, QUAD transmitters for
balanced communication using the RS-422 standard. These
drivers have very low output leakage currents (±10µA), so
they present a low load to the RS-422 bus.
Driver (Tx) 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
(‘172 pinout), a two channel EN12/EN34 (‘174 pinout), or a
versatile combination of individual and group channel
enables (see Table 1).
The ISL32372E, ISL32374E utilize slew rate limited drivers
which reduce EMI, and minimize reflections from improperly
terminated transmission lines, or from unterminated stubs in
multidrop and multipoint applications. Drivers on the other
versions are not limited, so they can achieve the 10Mbps or
32Mbps data rates. All versions are offered in Industrial and
Extended Industrial (-40°C to +125°C) temperature ranges.
A 50% smaller footprint (compared to the TSSOP) is
available with the ISL32179E’s QFN package. This device
also features a logic supply pin (V_L), that sets the switching
points of the enable and DI inputs to be compatible with a
lower supply voltage in mixed voltage systems. Two speed
select pins allow the ISL32179E user to select from three
slew rate options for 460kbps, 10Mbps, or 32Mbps data
rates. Individual channel and group enable pins increase the
ISL32179E’s flexibility.
Features
• IEC61000 ESD Protection on RS-422 Outputs . . ±16.5kV
- Class 3 ESD Level on all Other Pins . . . . . . 12kV HBM
- High Machine Model ESD Level on all Pins . . . . . 700V
• Wide Supply Range . . . . . . . . . . . . . . . . . . . 3.0V to 5.5V
• Specified for +125°C Operation
• Available in Industry Standard Pinouts (‘172/’174) or in a
Space Saving QFN (ISL32179E) with Added Features
• Logic Supply Pin (V_L) Eases Operation in Mixed Supply
Systems (ISL32179E Only)
• User Selectable Data Rate (ISL32179E Only)
• Hot Plug - Tx Outputs Remain Three-state During
Power-up and Power-Down
• Low Tx Leakage Allows > 256 Devices on the Bus
• High Data Rates . . . . . . . . . . . . . . . . . . . . . up to 32Mbps
• Low Quiescent Supply Current . . . . . . . . . . 0.8mA (Max)
- Low Shutdown Supply Current . . . . . . . . . . . . . . . 60µA
• Current Limiting and Thermal Shutdown for Driver
Overload Protection
• Tri-statable Tx Outputs
• 5V Tolerant Logic Inputs When V_CC ≤ 5V
• Pb-free (RoHS compliant)
Applications
• Telecom Equipment
• Motor Controllers / Encoders
• Programmable Logic controllers
• Industrial/Process Control Networks
PART
NUMBER
ISL32172E
ISL32272E
ISL32372E
ISL32174E
ISL32274E
ISL32374E
ISL32179E
TABLE 1. SUMMARY OF FEATURES
DATA RATE
FUNCTION (Mbps)
4 Tx
32
SLEW-RATE
LIMITED?
NO
HOT
PLUG?
YES
V_L PIN?
NO
TX
ENABLE
TYPE
EN, EN
QUIESCENT
I_CC (mA)
<1
4 Tx
10
NO
YES
NO
EN, EN
<1
4 Tx
0.46
YES
YES
NO
EN, EN
<1
4 Tx
32
NO
YES
NO
EN12, EN34
<1
4 Tx
10
NO
YES
NO
EN12, EN34
<1
4 Tx
0.46
YES
YES
NO
EN12, EN34
<1
4 Tx
32, 10, 0.46 SELECTABLE YES
YES
INDIV. AND
<1
GROUP
ENABLES
LOW POWER
SHUTDOWN?
NO
NO
NO
NO
NO
NO
YES
PIN
COUNT
16
16
16
16
16
16
24
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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