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SN74CBT3125CDR

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Texas Instruments Signal Switches, Multiplexers, Decoders, SOIC-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SN74CBT3125CDR

Texas Instruments · Signal Switches, Multiplexers, Decoders · SOIC-14

SN74CBT3125CDR from Texas Instruments, in a SOIC-14. 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 bus switch 1; the 1A-1B switch is ON when low and OFF (high-impedance) when high, and OE should be tied to VCC through a pullup resistor to keep the switch OFF during power up or power down.
2 1A bidirectional A port of bus switch 1, connected to 1B when 1OE is low; undershoot protection clamps the port to −2 V minimum while the switch is OFF.
3 1B bidirectional B port of bus switch 1, with typical ON-state resistance of 3 Ω and Ioff support for partial-power-down operation.
4 2OE input Active-low output enable for bus switch 2; the 2A-2B switch is ON when low and OFF (high-impedance) when high.
5 2A bidirectional A port of bus switch 2, connected to 2B when 2OE is low; undershoot protection clamps the port to −2 V minimum while the switch is OFF.
6 2B bidirectional B port of bus switch 2, with typical ON-state resistance of 3 Ω and Ioff support for partial-power-down operation.
7 GND power_in Ground reference for all voltages; continuous current through the GND terminal is limited to ±100 mA.
8 3B bidirectional B port of bus switch 3, with typical ON-state resistance of 3 Ω and Ioff support for partial-power-down operation.
9 3A bidirectional A port of bus switch 3, connected to 3B when 3OE is low; undershoot protection clamps the port to −2 V minimum while the switch is OFF.
10 3OE input Active-low output enable for bus switch 3; the 3A-3B switch is ON when low and OFF (high-impedance) when high.
11 4B bidirectional B port of bus switch 4, with typical ON-state resistance of 3 Ω and Ioff support for partial-power-down operation.
12 4A bidirectional A port of bus switch 4, connected to 4B when 4OE is low; undershoot protection clamps the port to −2 V minimum while the switch is OFF.
13 4OE input Active-low output enable for bus switch 4; the 4A-4B switch is ON when low and OFF (high-impedance) when high.
14 VCC power_in Supply voltage, recommended operating range 4 V to 5.5 V (absolute maximum −0.5 V to 7 V), with continuous current through the VCC terminal limited to ±100 mA.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-14
Category Logic
Pins 14

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply voltage VCC 4 5.5 V 3
High-level control input voltage VIH 2 5.5 V 3
Low-level control input voltage VIL 0 0.8 V 3
Data input/output voltage VI/O 0 5.5 V 3
Operating free-air temperature TA -40 85 °C 3
Supply voltage range VCC -0.5 7 V 3
Control input voltage range VIN -0.5 7 V 3
Switch I/O voltage range VI/O -0.5 7 V 3
Control input clamp current IIK -50 mA VIN < 0 3
I/O port clamp current II/OK -50 mA VI/O < 0 3
ON-state switch current II/O -128 128 mA 3
Continuous current through VCC or GND terminals -100 100 mA 3
Storage temperature range Tstg -65 150 °C 3
Package thermal impedance, D package θJA 86 °C/W D package, JESD 51-7 3
Control input clamp voltage VIK -1.8 V VCC = 4.5 V, IIN = −18 mA 4
Data input undershoot clamp voltage VIKU -2 V VCC = 5 V, 0 mA > II ≥ −50 mA, VIN = VCC or GND, Switch OFF 4
Control input leakage current IIN -1 1 µA VCC = 5.5 V, VIN = VCC or GND 4
Off-state I/O leakage current IOZ -10 10 µA VCC = 5.5 V, VO = 0 to 5.5 V, VI = 0, Switch OFF, VIN = VCC or GND 4
Partial power-down leakage current Ioff 10 µA VCC = 0, VO = 0 to 5.5 V, VI = 0 4
Quiescent supply current ICC 3 µA VCC = 5.5 V, II/O = 0, VIN = VCC or GND, Switch ON or OFF 4
Increase in supply current per control input at 3.4 V ΔICC 2.5 mA VCC = 5.5 V, One input at 3.4 V, Other inputs at VCC or GND 4
ON-state resistance ron 8 12 Ω VCC = 4 V, VI = 2.4 V, IO = −15 mA 4
ON-state resistance ron 3 6 Ω VI = 0, IO = 64 mA 4
ON-state resistance ron 5 10 Ω VCC = 4.5 V, VI = 2.4 V, IO = −15 mA 4
Propagation delay time (A or B to B or A) tpd 0.24 ns VCC = 4 V ± 0.5 V (see Figure 3) 4
Propagation delay time (A or B to B or A) tpd 0.15 ns VCC = 5 V (see Figure 3) 4
Enable time (OE to A or B) ten 4.4 ns VCC = 4 V ± 0.5 V (see Figure 3) 4
Enable time (OE to A or B) ten 1.5 4 ns VCC = 5 V (see Figure 3) 4
Disable time (OE to A or B) tdis 4.4 ns VCC = 4 V ± 0.5 V (see Figure 3) 4
Disable time (OE to A or B) tdis 1.5 4.4 ns VCC = 5 V (see Figure 3) 4
Undershoot output voltage VOUTU 2 V VCC = 5.5 V, Switch OFF, VIN = VCC or GND 5

CAD (KiCad official)

  • Symbol: SN74CBT3125CDR
  • Footprint: Package_SO:SOIC-14_3.9x8.7mm_P1.27mm
  • 3D model: SOIC-14 (KiCad packages3D, STEP)
  • 3D model files: sn74cbt3125cdr-etched.step / sn74cbt3125cdr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74cbt3125cdr.step / sn74cbt3125cdr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (25 pp, sha256 898af39109b7c77d, retrieved 2026-10-17, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (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