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Contents

Pinout
Key specifications
CAD (KiCad official)
Provenance

README

markdown

SN74CBT3253CPWR

Texas Instruments · Signal Switches, Multiplexers, Decoders · TSSOP-16

SN74CBT3253CPWR from Texas Instruments, in a TSSOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	1OE	input	Active-low output-enable for multiplexer 1; low connects 1A to the selected 1B port, high gives high impedance between A and B (control inputs 2 V min VIH, 0.8 V max VIL, up to 5.5 V).
2	S1	input	Select input S1 that, with S0, chooses which of the four B ports connects to the A port in both multiplexers.
3	1B4	bidirectional	Multiplexer 1 B4 data port, connected to 1A when S1 and S0 are high and 1OE is low; supports 0 to 5.5 V signaling.
4	1B3	bidirectional	Multiplexer 1 B3 data port, connected to 1A when S1 is high, S0 is low and 1OE is low; supports 0 to 5.5 V signaling.
5	1B2	bidirectional	Multiplexer 1 B2 data port, connected to 1A when S1 is low, S0 is high and 1OE is low; supports 0 to 5.5 V signaling.
6	1B1	bidirectional	Multiplexer 1 B1 data port, connected to 1A when S1 and S0 are low and 1OE is low; supports 0 to 5.5 V signaling.
7	1A	bidirectional	Multiplexer 1 common A data port, connected to one of 1B1-1B4 as selected by S1 and S0; supports 0 to 5.5 V signaling.
8	GND	power_in	Ground.
9	2A	bidirectional	Multiplexer 2 common A data port, connected to one of 2B1-2B4 as selected by S1 and S0; supports 0 to 5.5 V signaling.
10	2B1	bidirectional	Multiplexer 2 B1 data port, connected to 2A when S1 and S0 are low and 2OE is low; supports 0 to 5.5 V signaling.
11	2B2	bidirectional	Multiplexer 2 B2 data port, connected to 2A when S1 is low, S0 is high and 2OE is low; supports 0 to 5.5 V signaling.
12	2B3	bidirectional	Multiplexer 2 B3 data port, connected to 2A when S1 is high, S0 is low and 2OE is low; supports 0 to 5.5 V signaling.
13	2B4	bidirectional	Multiplexer 2 B4 data port, connected to 2A when S1 and S0 are high and 2OE is low; supports 0 to 5.5 V signaling.
14	S0	input	Select input S0 that, with S1, chooses which of the four B ports connects to the A port in both multiplexers.
15	2OE	input	Active-low output-enable for multiplexer 2; low connects 2A to the selected 2B port, high gives high impedance between A and B.
16	VCC	power_in	Supply voltage, 4 V to 5.5 V recommended operating range.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	TSSOP-16
Category	Logic
Pins	16

CAD (KiCad official)

Symbol: SN74CBT3253CPWR
Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
3D model: TSSOP-16 (KiCad packages3D, STEP)
3D model files: sn74cbt3253cpwr-etched.step / sn74cbt3253cpwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74cbt3253cpwr.step / sn74cbt3253cpwr.glb are the bare package body.

Provenance

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

Datasheet: Texas Instruments datasheet (26 pp, sha256 89e75930549ef68c, retrieved 2026-10-01, tier: manufacturer)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF