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SN74CB3T3257PWR
Public Made by Adomby adom
Texas Instruments Signal Switches, Multiplexers, Decoders, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSN74CB3T3257PWR
Texas Instruments · Signal Switches, Multiplexers, Decoders · TSSOP-16
SN74CB3T3257PWR 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 | S | input | Select input that connects B1 (low) or B2 (high) to the A port when OE is low; control inputs accept up to 5.5 V. |
| 2 | 1B1 | bidirectional | Channel 1 in/out 1 switch port, connected to 1A when OE is low and S is low; switch I/O voltage is specified from 0 V to 5.5 V. |
| 3 | 1B2 | bidirectional | Channel 1 in/out 2 switch port, connected to 1A when OE is low and S is high; switch I/O voltage is specified from 0 V to 5.5 V. |
| 4 | 1A | bidirectional | Channel 1 out/in common switch port, which connects to 1B1 or 1B2 depending on S when OE is low; switch I/O voltage is specified from 0 V to 5.5 V. |
| 5 | 2B1 | bidirectional | Channel 2 in/out 1 switch port, connected to 2A when OE is low and S is low; switch I/O voltage is specified from 0 V to 5.5 V. |
| 6 | 2B2 | bidirectional | Channel 2 in/out 2 switch port, connected to 2A when OE is low and S is high; switch I/O voltage is specified from 0 V to 5.5 V. |
| 7 | 2A | bidirectional | Channel 2 out/in common switch port, which connects to 2B1 or 2B2 depending on S when OE is low; switch I/O voltage is specified from 0 V to 5.5 V. |
| 8 | GND | power_in | Ground reference for the device. |
| 9 | 3A | bidirectional | Channel 3 out/in common switch port, which connects to 3B1 or 3B2 depending on S when OE is low; switch I/O voltage is specified from 0 V to 5.5 V. |
| 10 | 3B2 | bidirectional | Channel 3 in/out 2 switch port, connected to 3A when OE is low and S is high; switch I/O voltage is specified from 0 V to 5.5 V. |
| 11 | 3B1 | bidirectional | Channel 3 in/out 1 switch port, connected to 3A when OE is low and S is low; switch I/O voltage is specified from 0 V to 5.5 V. |
| 12 | 4A | bidirectional | Channel 4 out/in common switch port, which connects to 4B1 or 4B2 depending on S when OE is low; switch I/O voltage is specified from 0 V to 5.5 V. |
| 13 | 4B2 | bidirectional | Channel 4 in/out 2 switch port, connected to 4A when OE is low and S is high; switch I/O voltage is specified from 0 V to 5.5 V. |
| 14 | 4B1 | bidirectional | Channel 4 in/out 1 switch port, connected to 4A when OE is low and S is low; switch I/O voltage is specified from 0 V to 5.5 V. |
| 15 | OE | input | Active-low output enable; driving it high places all channels in the high-impedance disconnect state. |
| 16 | VCC | power_in | Power supply; the recommended operating range is 2.3 V to 3.6 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-16 |
| Category | Logic |
| Pins | 16 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| ON-state switch resistance (VCC 2.3 V, IO = 24 mA) | rON | 5 | 8 | Ω | VCC 2.3 V (TYP at 2.5 V); VI = 0 V; IO = 24 mA; TA -40°C to +85°C | 6 | |
| ON-state switch resistance (VCC 2.3 V, IO = 16 mA) | rON | 5 | 8 | Ω | VCC 2.3 V (TYP at 2.5 V); VI = 0 V; IO = 16 mA; TA -40°C to +85°C | 6 | |
| ON-state switch resistance (VCC 3 V, IO = 64 mA) | rON | 5 | 7 | Ω | VCC 3 V (TYP at 3.3 V); VI = 0 V; IO = 64 mA; TA -40°C to +85°C | 6 | |
| ON-state switch resistance (VCC 3 V, IO = 32 mA) | rON | 5 | 7 | Ω | VCC 3 V (TYP at 3.3 V); VI = 0 V; IO = 32 mA; TA -40°C to +85°C | 6 | |
| Power down switch leakage current | Ioff | -10 | 10 | µA | VCC 0 V; VI = 0 V; 0 ≤ VO ≤ 5.5 V; TA -40°C to +85°C | 6 | |
| Switch OFF leakage current | Ioz | -10 | 10 | µA | VCC 3.6 V; VI = 0 V, VIN = VCC or GND; 0 ≤ VO ≤ 5.5 V; TA -40°C to +85°C | 6 | |
| ON-state switch leakage current (VI = VCC-0.7 to 5.5 V) | II | -20 | 20 | µA | VCC 3.6 V; VI = VCC-0.7 to 5.5 V; VIN = VCC or GND; TA -40°C to +85°C | 6 | |
| ON-state switch leakage current (VI = 0.7 to VCC-0.7 V) | II | -40 | µA | VCC 3.6 V; VI = 0.7 to VCC-0.7 V; VIN = VCC or GND; TA -40°C to +85°C | 6 | ||
| ON-state switch leakage current (VI = 0 to 0.7 V) | III | -5 | 5 | µA | VCC 3.6 V; VI = 0 to 0.7 V; VIN = VCC or GND; TA -40°C to +85°C | 6 | |
| Control input current | IIN | -10 | 10 | µA | VCC 3.6 V; VCC ≤ VIN ≤ 5.5 V or VIN = 0 V; TA -40°C to +85°C | 6 | |
| Supply current (VI = VCC or GND) | ICC | 20 | µA | VCC 3.6 V; VI = VCC or GND; Ii/o = 0; VIN = VCC or GND; TA -40°C to +85°C | 6 | ||
| Supply current (VI = 5.5 V) | ICC | 20 | µA | VCC 3.6 V; VI = 5.5 V; Ii/o = 0; VIN = VCC or GND; TA -40°C to +85°C | 6 | ||
| Quiescent device current with respect to control inputs | ΔICC | 300 | µA | VCC 3 to 3.6 V; VIN = VCC - 0.6 V; other inputs at 0/VCC; TA -40°C to +85°C | 6 | ||
| Clamp voltage | Vik | -1.2 | V | VCC 3 V; II = -18 mA; TA -40°C to +85°C | 6 | ||
| Enable time OE to A or B (VCC 2.5 V ± 0.2 V) | ten | 10.4 | ns | VCC 2.5 V ± 0.2 V; ZL: RL = 250 Ω, CL = 30 pF, Vload = VCC; ZH: RL = 500 Ω, CL = 30 pF, Vload = GND; 50 Ω termination at input | 7 | ||
| Enable time OE to A or B (VCC 3.3 V ± 0.3 V) | ten | 8.3 | ns | VCC 3.3 V ± 0.3 V; ZL: RL = 250 Ω, CL = 50 pF, Vload = VCC; ZH: RL = 500 Ω, CL = 50 pF, Vload = GND; 50 Ω termination at input | 7 | ||
| Disable time OE to A or B (VCC 2.5 V ± 0.2 V) | tdis | 7.4 | ns | VCC 2.5 V ± 0.2 V; LZ: RL = 250 Ω, CL = 30 pF, V△ = 0.15 V; HZ: RL = 500 Ω, CL = 30 pF, V△ = 0.15 V; 50 Ω termination at input | 7 | ||
| Disable time OE to A or B (VCC 3.3 V ± 0.3 V) | tdis | 8 | ns | VCC 3.3 V ± 0.3 V; LZ: RL = 250 Ω, CL = 50 pF, V△ = 0.3 V; HZ: RL = 500 Ω, CL = 50 pF, V△ = 0.3 V; 50 Ω termination at input | 7 | ||
| Propagation delay S to A (VCC 2.5 V ± 0.2 V) | tpd(s) | 13.4 | ns | VCC 2.5 V ± 0.2 V; RL = 500 Ω, CL = 30 pF, Vload = 0 V; 50 Ω termination at input | 7 | ||
| Propagation delay S to A (VCC 3.3 V ± 0.3 V) | tpd(s) | 10.1 | ns | VCC 3.3 V ± 0.3 V; RL = 500 Ω, CL = 50 pF, Vload = 0 V; 50 Ω termination at input | 7 | ||
| Enable time S to B (VCC 2.5 V ± 0.2 V) | ten(s) | 13 | ns | VCC 2.5 V ± 0.2 V; ZL: RL = 250 Ω, CL = 30 pF, Vload = VCC; ZH: RL = 500 Ω, CL = 30 pF, Vload = GND; 50 Ω termination at input | 7 | ||
| Enable time S to B (VCC 3.3 V ± 0.3 V) | ten(s) | 10.1 | ns | VCC 3.3 V ± 0.3 V; ZL: RL = 250 Ω, CL = 50 pF, Vload = VCC; ZH: RL = 500 Ω, CL = 50 pF, Vload = GND; 50 Ω termination at input | 7 | ||
| Disable time S to B (VCC 2.5 V ± 0.2 V) | tdis(s) | 9.1 | ns | VCC 2.5 V ± 0.2 V; LZ: RL = 250 Ω, CL = 30 pF, V△ = 0.15 V; HZ: RL = 500 Ω, CL = 30 pF, V△ = 0.15 V; 50 Ω termination at input | 7 | ||
| Disable time S to B (VCC 3.3 V ± 0.3 V) | tdis(s) | 8.3 | ns | VCC 3.3 V ± 0.3 V; LZ: RL = 250 Ω, CL = 50 pF, V△ = 0.3 V; HZ: RL = 500 Ω, CL = 50 pF, V△ = 0.3 V; 50 Ω termination at input | 7 | ||
| Supply voltage (absolute max) | VCC | -0.5 | 7 | V | 4 | ||
| Control input voltage (absolute max) | VIN | -0.5 | 7 | V | 4 | ||
| Voltage range applied to any output in high-impedance or power-off state | VI/O | -0.5 | 7 | V | 4 | ||
| Control input clamp current | IIK | -50 | mA | VIN < 0 | 4 | ||
| I/O port diode current | II/O | -50 | mA | VI/O < 0 | 4 | ||
| On-state switch current | II/O | -128 | 128 | mA | VI/O = 0 to VCC | 4 | |
| Continuous current through VCC or GND | -100 | 100 | mA | 4 | |||
| Junction temperature | TJ | 150 | °C | 4 | |||
| Storage temperature | Tstg | -65 | 150 | °C | 4 | ||
| Supply voltage (recommended) | VCC | 2.3 | 3.6 | V | 4 | ||
| Switch input or output voltage (recommended) | VI/O | 0 | 5.5 | V | 4 | ||
| High-level input voltage, control input | VIH | 1.7 | 5.5 | V | VCC = 2.3 V to 2.7 V | 4 | |
| High-level input voltage, control input | VIH | 2 | 5.5 | V | VCC = 2.7 V to 3.6 V | 4 | |
| Low-level input voltage, control input | VIL | 0 | 0.7 | V | VCC = 2.3 V to 2.7 V | 4 | |
| Low-level input voltage, control input | VIL | 0 | 0.8 | V | VCC = 2.7 V to 3.6 V | 4 | |
| Operating free-air temperature | TA | -40 | 85 | °C | 4 | ||
| Junction-to-ambient thermal resistance (PW package) | RθJA | 129.1 | °C/W | PW (16 pins) package | 5 |
CAD (KiCad official)
- Symbol:
SN74CB3T3257PWR - Footprint:
Package_SO:TSSOP-16_4.4x5mm_P0.65mm - 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files:
sn74cb3t3257pwr-etched.step/sn74cb3t3257pwr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74cb3t3257pwr.step/sn74cb3t3257pwr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (29 pp, sha256
975520e2dfdc31ad, retrieved 2026-10-21, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).