SN74LVC157APWR from Texas Instruments, 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	A/B	input	Address select input. When low, A inputs are routed to Y outputs; when high, B inputs are routed to Y outputs. Active-low select for the A channel (A/B with bar over A).
2	1A	input	Channel 1, data input A. CMOS logic input, accepts up to 5.5V.
3	1B	input	Channel 1, data input B. CMOS logic input, accepts up to 5.5V.
4	1Y	output	Channel 1, data output. Push-pull CMOS output; drives up to ±24 mA at VCC = 3V.
5	2A	input	Channel 2, data input A. CMOS logic input, accepts up to 5.5V.
6	2B	input	Channel 2, data input B. CMOS logic input, accepts up to 5.5V.
7	2Y	output	Channel 2, data output. Push-pull CMOS output; drives up to ±24 mA at VCC = 3V.
8	GND	power_in	Ground reference.
9	3Y	output	Channel 3, data output. Push-pull CMOS output; drives up to ±24 mA at VCC = 3V.
10	3B	input	Channel 3, data input B. CMOS logic input, accepts up to 5.5V.
11	3A	input	Channel 3, data input A. CMOS logic input, accepts up to 5.5V.
12	4Y	output	Channel 4, data output. Push-pull CMOS output; drives up to ±24 mA at VCC = 3V.
13	4B	input	Channel 4, data input B. CMOS logic input, accepts up to 5.5V.
14	4A	input	Channel 4, data input A. CMOS logic input, accepts up to 5.5V.
15	~{G}	input	Output strobe / output enable, active low. When high, all Y outputs are forced low; when low, the selected A or B inputs are routed to the outputs.
16	VCC	power_in	Positive supply, 1.65V to 3.6V operating range (absolute max 6.5V). Bypass with 0.1 µF close to the pin.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

SN74LVC157APWR
SN74LVC157APWRD
SN74LVC157APWRDR
SN74LVC157APWRDB
SN74LVC157APWRDBR
SN74LVC157APWRNS
SN74LVC157APWRNSR
SN74LVC157APWRBQB
SN74LVC157APWRRGY
SN74LVC157APWRRGYR
SN74LVC157APWRFK
SN74LVC157APWRJ
SN74LVC157APWRW

CAD (KiCad official)

Symbol: SN74LVC157APWR
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: Texas Instruments datasheet (38 pp, sha256 9d13c66e1a9c688f, 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