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RS245YTSS20

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by Ray

Jiangsu RUNIC Tech Buffers, Drivers, Receivers, Transceivers, TSSOP-20. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Symbol & Footprint

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Datasheet

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Contents

README

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RS245YTSS20

Jiangsu RUNIC Tech · Buffers, Drivers, Receivers, Transceivers · TSSOP-20

RS245YTSS20 from Jiangsu RUNIC Tech, in a TSSOP-20. 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 DIR input Direction control input. When OE is low: DIR=L routes B data to A bus; DIR=H routes A data to B bus. Must be held at a valid logic level; do not float.
2 A0 bidirectional A-port bit 0. Bidirectional data I/O; direction determined by DIR when OE is asserted (low). Hi-Z when OE is high or during Vcc isolation.
3 A1 bidirectional A-port bit 1. Bidirectional data I/O; direction determined by DIR when OE is asserted.
4 A2 bidirectional A-port bit 2. Bidirectional data I/O; direction determined by DIR when OE is asserted.
5 A3 bidirectional A-port bit 3. Bidirectional data I/O; direction determined by DIR when OE is asserted.
6 A4 bidirectional A-port bit 4. Bidirectional data I/O; direction determined by DIR when OE is asserted.
7 A5 bidirectional A-port bit 5. Bidirectional data I/O; direction determined by DIR when OE is asserted.
8 A6 bidirectional A-port bit 6. Bidirectional data I/O; direction determined by DIR when OE is asserted.
9 A7 bidirectional A-port bit 7. Bidirectional data I/O; direction determined by DIR when OE is asserted.
10 GND power_in Ground reference (0 V) for the device.
11 B7 bidirectional B-port bit 7. Bidirectional data I/O; direction determined by DIR when OE is asserted.
12 B6 bidirectional B-port bit 6. Bidirectional data I/O; direction determined by DIR when OE is asserted.
13 B5 bidirectional B-port bit 5. Bidirectional data I/O; direction determined by DIR when OE is asserted.
14 B4 bidirectional B-port bit 4. Bidirectional data I/O; direction determined by DIR when OE is asserted.
15 B3 bidirectional B-port bit 3. Bidirectional data I/O; direction determined by DIR when OE is asserted.
16 B2 bidirectional B-port bit 2. Bidirectional data I/O; direction determined by DIR when OE is asserted.
17 B1 bidirectional B-port bit 1. Bidirectional data I/O; direction determined by DIR when OE is asserted.
18 B0 bidirectional B-port bit 0. Bidirectional data I/O; direction determined by DIR when OE is asserted.
19 OE input Output Enable, active LOW. Drive low to enable the transceiver in the direction chosen by DIR; drive high to place both A and B ports in the high-impedance (3-state) mode. During power-up/down should be tied to Vcc through a pull-up resistor.
20 VCC power_in Positive supply voltage input. Operating range 1.65 V to 5.5 V. If Vcc is at GND both ports enter the high-impedance state (Vcc isolation).

Key specifications

Parameter Value
Manufacturer Jiangsu RUNIC Tech
Package TSSOP-20
Category Logic
Pins 20

Ordering variants

Same part, different packaging or reel option.

  • RS245YTSS20
  • RS245YTSS20YS20

CAD (KiCad official)

  • Symbol: RS245YTSS20
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Jiangsu RUNIC Tech datasheet (15 pp, sha256 bb8b42fbb01f615f, retrieved 2026-08-17, tier: lcsc)
  • 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