ISL3156E

16kV ESD Protected, RS-485/RS-422 Differential Transceiver with Full Fail-safe Rx

Product Status: Mass Production

OVERVIEW

The ISL315xE family of 5V powered RS-485/RS-422 transceivers features high output drive and high ESD protection. The devices withstand ±16.5kV IEC61000-4- 2 ESD strikes without latch-up. The large output voltage of 3.1V typical into a 54Ω load provides high noise immunity, and enables the drive of up to 8000ft long bus segments, or eight 120Ω terminations in a star topology.

These devices possess less than 125μA bus input currents, thus constituting a true 1/8 unit load. The high output drive combined with the low bus input currents allows for connecting up to 512 transceivers on the same bus.

The receiver inputs feature a full fail-safe design that turns the receiver outputs high when the bus inputs are open or shorted.

The ISL315xE family includes half and full-duplex transceivers with active-high driver-enable pins and active-low receiver enable pins. These transceivers support data rates of 115kbps, 1Mbps, and 20Mbps. Their performance is characterized from -40°C to +85°C.

KEY FEATURES

  • High VOD: 3.1V (Typ) into RD = 54Ω
  • Low bus currents: 125μA constitutes a true 1/8 unit load
  • Allows for up to 512 transceivers on the bus
  • ±16.5kV ESD protection on bus I/O pins
  • High transient overvoltage tolerance of ±100V
  • Full fail-safe outputs for open or shorted inputs
  • Hot plug capability - driver and receiver outputs remain high-impedance during power-up and power-down
  • Supported data rates: 115kbps, 1Mbps, 20Mbps
  • Low supply current (driver disabled): 550μA
  • Ultra-low shutdown current: 70nA

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL3156E
Basic Information
Production Status
Mass Production
Key Feature
High Speed
# of Tx
1
# of Rx
1
Devices Allowed on Bus
256
Half/Full Duplex
Full
High ESD Protection
Yes-IEC61000
Hot Plug
Yes
Data Rate
20 Mbps
Supply Voltage Vcc (Min) (V)
4.5
Supply Voltage Vcc (Max) (V)
5.5
Slew Rate Limited
No
Tx/Rx Enable
Yes
IS Enabled/Disabled
800/700 µA
SHDN ICC
0.07 µA
VL Pin
No
Qualification Level
Standard
Supply Voltage Vcc Range (V)
4.5 to 5.5
Can Sample
YES
Temperature Range
-40 to +85

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