Specifications
| Type | Description |
|---|---|
| Part Number | SN74HC157 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Component Type | Other |
| Package / Case | D SOIC-16 9.90 mm x 3.90 mm; DB SSOP-16 6.20 mm x 5.30 mm; N PDIP-16 19.31 mm x 6.35 mm; NS SOP-16 6.20 mm x 5.30 mm; PW TSSOP-16 5.00 mm x 4.40 mm; J CDIP-16 24.38 mm x 6.92 mm; FK LCCC-20 8.89 mm x 8.45 mm; W CFP-16 10.16 mm x 6.73 mm |
| Supply Voltage Range | 2 to 6 V |
| Nominal Supply Voltage | 5 V |
| High-Level Input Voltage | min 1.5 V |
| High-Level Input Voltage | min 3.15 V |
| High-Level Input Voltage | min 4.2 V |
| Low-Level Input Voltage | max 0.5 V |
| Low-Level Input Voltage | max 1.35 V |
| Low-Level Input Voltage | max 1.8 V |
| Input Voltage Range | 0 to VCC |
| Output Voltage Range | 0 to VCC |
| Input Transition Rise/Fall Time | max 1000 ns |
| Input Transition Rise/Fall Time | max 500 ns |
| Input Transition Rise/Fall Time | max 400 ns |
| Operating Free-Air Temperature | -55 to 125 °C |
| Absolute Maximum Supply Voltage | -0.5 to 7 V |
| Input Clamp Current | ±20 mA |
| Output Clamp Current | ±20 mA |
| Continuous Output Current | ±35 mA |
| Continuous Current Through VCC or GND | ±70 mA |
| Junction Temperature | max 150 °C |
| Storage Temperature | -65 to 150 °C |
| Junction-to-Ambient Thermal Resistance | 73 °C/W |
| Junction-to-Ambient Thermal Resistance | 82 °C/W |
| Junction-to-Ambient Thermal Resistance | 67 °C/W |
| Junction-to-Ambient Thermal Resistance | 64 °C/W |
| Junction-to-Ambient Thermal Resistance | 108 °C/W |
| High-Level Output Voltage | min 1.9 V, typ 1.998 V |
| High-Level Output Voltage | min 4.4 V, typ 4.499 V |
| High-Level Output Voltage | min 5.9 V, typ 5.999 V |
| High-Level Output Voltage | min 3.98 V, typ 4.3 V; SN74HC157 min 3.7 V over temperature |
| High-Level Output Voltage | min 5.48 V, typ 5.8 V; SN74HC157 min 5.2 V over temperature |
| Low-Level Output Voltage | typ 0.002 V, max 0.1 V |
| Low-Level Output Voltage | typ 0.001 V, max 0.1 V |
| Low-Level Output Voltage | typ 0.001 V, max 0.1 V |
| Low-Level Output Voltage | typ 0.17 V, max 0.26 V; SN74HC157 max 0.4 V over temperature |
| Low-Level Output Voltage | typ 0.15 V, max 0.26 V; SN74HC157 max 0.4 V over temperature |
| Input Current | typ ±0.1 nA, max ±100 nA at TA=25°C, SN74HC157 max ±1000 nA over temperature |
| Supply Current | typ 8 µA, max 160 µA |
| Input Capacitance | typ 3 pF, max 10 pF |
| Propagation Delay A or B to Y | typ 63 ns, max 125 ns at TA=25°C; SN74HC157 max 190 ns over temperature |
| Propagation Delay A or B to Y | typ 13 ns, max 25 ns at TA=25°C; SN74HC157 max 38 ns over temperature |
| Propagation Delay A or B to Y | typ 11 ns, max 21 ns at TA=25°C; SN74HC157 max 32 ns over temperature |
| Propagation Delay A/B Select to Y | typ 18 ns, max 25 ns at TA=25°C; SN74HC157 max 38 ns over temperature |
| Propagation Delay G to Y | typ 16 ns, max 23 ns at TA=25°C; SN74HC157 max 34 ns over temperature |
| Output Transition Time | typ 8 ns, max 12 ns at TA=25°C; SN74HC157 max 18 ns over temperature |
| Propagation Delay A or B to Y | typ 23 ns, max 38 ns at TA=25°C; SN74HC157 max 47 ns over temperature |
| Propagation Delay A/B Select to Y | typ 23 ns, max 42 ns at TA=25°C; SN74HC157 max 52 ns over temperature |
| Propagation Delay G to Y | typ 24 ns, max 38 ns at TA=25°C; SN74HC157 max 47 ns over temperature |
| Output Transition Time | typ 17 ns, max 42 ns at TA=25°C; SN74HC157 max 53 ns over temperature |
| Power Dissipation Capacitance | typ 40 pF |
| Function | Four 2-to-1 multiplexers |
| Strobe Function | High level at G forces all outputs low |
| Select Function | A/B low selects A input; A/B high selects B input |
| Unused Input Requirement | Unused inputs must be held at VCC or GND |
| Recommended Pull Resistor | 10 kΩ |
| Datasheet Status | request_only |
Product Overview
The SN74HC157 is a Texas Instruments quad 2-to-1 data selector multiplexer in the Signal_Chain category. Its logic function consists of four 2-to-1 multiplexers with common A/B select and G strobe inputs. With G low, a low A/B level selects the A input, while a high A/B level selects the B input. A high level at G forces all outputs low regardless of address and data inputs.
Recommended operating conditions specify a 2 to 6 V supply range with 5 V nominal operation. Input and output voltage ranges are 0 to VCC, and the operating free-air temperature range is -55 to 125 °C. Unused inputs must be held at VCC or GND, and a 10 kΩ pull resistor is recommended for inputs that are not actively driven at all times.
Package coverage includes D SOIC-16, DB SSOP-16, N PDIP-16, NS SOP-16, PW TSSOP-16, J CDIP-16, FK LCCC-20, and W CFP-16. Timing data includes A or B to Y propagation delay of 13 ns typical and 25 ns maximum at 4.5 V, CL=50 pF, and TA=25 °C.
Key Features
- Quad 2-to-1 data selector multiplexer function
- Four multiplexers share common A/B select and G strobe
- A/B low selects A input when G is low
- A/B high selects B input when G is low
- High level at G forces all outputs low
- Recommended supply range is 2 to 6 V
- Input and output voltage ranges are 0 to VCC
- Operating free-air temperature is -55 to 125 °C
- Input capacitance is 3 pF typical, 10 pF maximum
- Unused inputs must be tied to VCC or GND
Typical Applications
- Four-channel digital signal selection
- A/B data path multiplexing
- Logic-controlled input routing
- Shared-select signal switching
- Strobe-controlled output disable
- 5 V nominal logic systems
- 2 to 6 V logic interfaces
Procurement Notes
When requesting a quote for SN74HC157, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What function does the SN74HC157 provide?
The SN74HC157 provides four 2-to-1 multiplexers. All four channels are controlled by common A/B select and G strobe inputs, allowing A or B input selection when G is low.
What supply voltage range is recommended for SN74HC157?
The recommended operating supply voltage range for SN74HC157 is 2 to 6 V, with 5 V listed as the nominal supply voltage in the extracted datasheet facts.
How does the G strobe input affect outputs?
A high level at G forces all outputs low, regardless of address and data inputs. When G is low, the A/B select input determines whether A or B inputs are routed.
What should be done with unused SN74HC157 inputs?
Unused inputs must be held at VCC or GND for proper operation. For inputs that are not actively driven at all times, the extracted facts list a recommended 10 kΩ pull resistor.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.