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ST26C31BTR

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by Ray

STMicroelectronics RS-485 / RS-422 ICs, TSSOP-16. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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ST26C31BTR

STMicroelectronics · RS-485 / RS-422 ICs · TSSOP-16

ST26C31BTR from STMicroelectronics, in a TSSOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 AIN input Channel A single-ended TTL/CMOS input. Drives the channel A differential output pair.
2 AOUT output Channel A non-inverting differential (RS-422) output. 3-state output enabled by the EN/nEN pins.
3 /AOUT output Channel A inverting differential (RS-422) output. 3-state output enabled by the EN/nEN pins.
4 EN input Active-high enable input. When EN is low and /EN (pin 12) is high, all four channel outputs go to the high-impedance state.
5 /BOUT output Channel B inverting differential (RS-422) output. 3-state output enabled by the EN/nEN pins.
6 BOUT output Channel B non-inverting differential (RS-422) output. 3-state output enabled by the EN/nEN pins.
7 BIN input Channel B single-ended TTL/CMOS input. Drives the channel B differential output pair.
8 GND power_in Ground reference (0 V).
9 CIN input Channel C single-ended TTL/CMOS input. Drives the channel C differential output pair.
10 COUT output Channel C non-inverting differential (RS-422) output. 3-state output enabled by the EN/nEN pins.
11 /COUT output Channel C inverting differential (RS-422) output. 3-state output enabled by the EN/nEN pins.
12 /EN input Active-low enable input. When /EN is high and EN (pin 4) is low, all four channel outputs go to the high-impedance state.
13 /DOUT output Channel D inverting differential (RS-422) output. 3-state output enabled by the EN/nEN pins.
14 DOUT output Channel D non-inverting differential (RS-422) output. 3-state output enabled by the EN/nEN pins.
15 DIN input Channel D single-ended TTL/CMOS input. Drives the channel D differential output pair.
16 VCC power_in Supply voltage input. Recommended operating range 4.5 V to 5.5 V (absolute max 7 V).

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package TSSOP-16
Category Interface
Pins 16

Ordering variants

Same part, different packaging or reel option.

  • ST26C31BTR
  • ST26C31BTRDR
  • ST26C31BTRN

CAD (KiCad official)

  • Symbol: ST26C31BTR
  • Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
  • 3D model: TSSOP-16 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: STMicroelectronics datasheet (15 pp, sha256 628b38556e56079d, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF