Product
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SN75ALS1178
  • SN75ALS1178
  • SN75ALS1178
  • SN75ALS1178
  • SN75ALS1178

SN75ALS1178

ACTIVE

Dual Differential Drivers And Receivers

Texas Instruments SN75ALS1178 Product Info

1 April 2026 4

Parameters

Number of receivers

2

Number of transmitters

2

Duplex

Full

Supply voltage (nom) (V)

5

Signaling rate (max) (Mbps)

10

IEC 61000-4-2 contact (±V)

None

Fault protection (V)

-10 to 15

Common-mode range (V)

-7 to 12

Number of nodes

32

Isolated

No

Supply current (max) (µA)

50000

Rating

Catalog

Operating temperature range (°C)

0 to 70

Package

PDIP (N)-16-181.42 mm² 19.3 x 9.4

Features

  • Meet or exceed standards TIA/EIA-422-B and TIA/EIA-485-A
  • Designed for multipoint bus transmission on long bus lines in noisy environments
  • Low supply-current requirement 50mA maximum
  • Driver positive-and negative-current limiting
  • Driver common-mode output voltage range of –7V to 12V
  • Thermal shutdown protection driver 3-state outputs active-high enable
  • Receiver common-mode input voltage range of –12V to 12V
  • Receiver input sensitivity: ±200mV
  • Receiver hysteresis: 50mV typical
  • Receiver high input impedance: 12kΩ minimum
  • Receiver 3-state outputs active-low enable for SN75ALS1177 only
  • Operate from single 5V supply
  • Meet or exceed standards TIA/EIA-422-B and TIA/EIA-485-A
  • Designed for multipoint bus transmission on long bus lines in noisy environments
  • Low supply-current requirement 50mA maximum
  • Driver positive-and negative-current limiting
  • Driver common-mode output voltage range of –7V to 12V
  • Thermal shutdown protection driver 3-state outputs active-high enable
  • Receiver common-mode input voltage range of –12V to 12V
  • Receiver input sensitivity: ±200mV
  • Receiver hysteresis: 50mV typical
  • Receiver high input impedance: 12kΩ minimum
  • Receiver 3-state outputs active-low enable for SN75ALS1177 only
  • Operate from single 5V supply

Description

The SN75ALS1177 and SN75ALS1178 dual differential drivers and receivers are integrated circuits designed for bidirectional data communication on multipoint bus transmission lines. The devices are designed for balanced transmission lines, and meet standards TIA/EIA-422-B and TIA/EIA-485-A.

The SN75ALS1177 combines dual 3-state differential line drivers and dual 3-state differential input line receivers, both of which operate from a single 5V power supply. The drivers and receivers have active-high and active-low enables, respectively, which can be externally connected together to function as direction control. The SN75ALS1178 drivers each have an individual active-high enable. Fail-safe design ensures that when the receiver inputs are open, the receiver outputs are always high.

The SN75ALS1177 and SN75ALS1178 are characterized for operation from 0°C to 70°C.

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