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Texas Instruments SN74AHC157PWRG4
- Part No.:
- SN74AHC157PWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AHC157PWRG4.pdf
- Description:
- IC MULTIPLEXER 4 X 2:1 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,887
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Product details
Overview
SN74AHC157PWRG4 from Texas Instruments is a quadruple 2-line to 1-line data selector/multiplexer operating from 2 V to 5.5 V, featuring active-low strobe (G) control, true output logic, and 16-pin TSSOP packaging. It routes one of two 4-bit input words to four outputs based on the A/B select line, with propagation delays as low as 4.1 ns at 5 V and 15 pF load - used in digital bus arbitration, signal routing, and address/data path selection in microcontroller peripheral interfaces.
For engineers reviewing the SN74AHC157PWRG4 datasheet, SN74AHC157PWRG4 pinout, SN74AHC157PWRG4 application, or SN74AHC157PWRG4 equivalent, key selection considerations include its 2–5.5 V supply range, guaranteed 125 °C operation, ESD robustness (±2000 V HBM), low static current (≤40 µA), and compatibility with mixed-voltage logic systems requiring level-shifting multiplexing.
Technical Context
The SN74AHC157PWRG4 implements four independent 2:1 multiplexers sharing a common active-low strobe (G) and address select (A/B) input. When G is high, all Y outputs are forced low regardless of A/B or data inputs; when G is low, each Yn selects between An and Bn per the A/B state. The device uses advanced CMOS (AHC) process technology for rail-to-rail output swing and low power consumption.
It operates across industrial temperature range (–40 °C to +125 °C), supports 15 pF and 50 pF load switching characteristics, and maintains consistent VOL ≤ 0.1 V and VOH ≥ 4.4 V at 4.5 V supply with 8 mA sink/source capability - enabling reliable interfacing with TTL, LVTTL, and other 3.3 V/5 V logic families without external level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2 V to 5.5 V - enables direct interface with 2.5 V, 3.3 V, and 5 V logic domains without voltage translation. |
| Propagation Delay (tPLH/tPHL) | 4.1 ns max at VCC = 5 V, CL = 15 pF - supports high-speed data routing in real-time control and communication subsystems. |
| Output Drive Strength | ±8 mA at VCC = 5 V - sufficient to drive multiple standard CMOS/TTL loads or short PCB traces without buffering. |
| Static Supply Current (ICC) | 40 µA max at VCC = 5.5 V - ensures ultra-low quiescent power in battery-backed or always-on monitoring circuits. |
| ESD Rating (HBM) | ±2000 V - meets IEC 61000-4-2 Level 2 requirements for robust handling in automated assembly and field service. |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive, industrial PLC, and outdoor embedded applications. |
| Input Thresholds (VIH/VIL) | VIL ≤ 1.65 V, VIH ≥ 3.85 V at VCC = 5.5 V - provides wide noise margin (>1.2 V) against ground bounce and crosstalk. |
Pinout & Package
TSSOP-16 package (PW), 5.00 mm × 6.4 mm body size, 0.65 mm lead pitch, exposed thermal pad (optional GND connection). RoHS-compliant, NIPDAU/SN lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A/B) | Address select input | Global 2:1 selection control for all four channels - ties to system address or mode lines. |
| 2–3, 5–6, 10–11, 13–14 (1A–1B, 2A–2B, 3A–3B, 4A–4B) | Data inputs | Eight total inputs grouped into four pairs - accepts parallel data streams from dual sources (e.g., RAM vs. ROM, sensor A vs. sensor B). |
| 4, 7, 9, 12 (1Y–4Y) | True outputs | Four buffered, non-inverted outputs - directly drive downstream logic, latches, or ADC sample clocks. |
| 8 (GND) | Ground reference | Primary return path for logic and supply currents - requires low-inductance connection to system ground plane. |
| 15 (G) | Active-low strobe | Global enable/disable - synchronizes multiplexer action with system timing or disables outputs to prevent bus contention. |
| 16 (VCC) | Positive supply | Single power rail for entire device - must be decoupled with 0.1 µF ceramic capacitor placed <2 mm from pin. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | VOH ≥ VCC – 0.1 V and VOL ≤ 0.1 V at 8 mA load - eliminates need for pull-up resistors in open-drain configurations. |
| Wide VCC tolerance | 2 V to 5.5 V operation - allows seamless integration across legacy 5 V and modern low-voltage 2.5 V/3.3 V designs. |
| Low dynamic power | 11 pF typical power dissipation capacitance - reduces switching current and EMI in high-frequency clock/data paths. |
| High noise immunity | Input hysteresis not specified, but VIH/VIL separation >1.2 V at 5.5 V - suppresses false triggering from transient coupling. |
| Strobe-synchronized outputs | G input forces all Y outputs low when asserted - prevents glitching during channel switching or power-up sequencing. |
Applications
| Industrial Data Acquisition | Automotive Sensor Multiplexing |
|---|---|
|
Use Scenario: Selecting between analog front-end channels (e.g., thermocouple, RTD, strain gauge) feeding a shared ADC in a programmable logic controller. IC Role / Device Role / Timing Role: Digital multiplexer routing analog conditioning signals to a single ADC input under microcontroller command. Use Value: Reduces component count by eliminating separate ADCs per sensor while maintaining channel isolation via controlled switching. |
Use Scenario: Routing CAN transceiver status signals, LIN bus diagnostics, and engine sensor data to a central ECU diagnostic port. IC Role / Device Role / Timing Role: Signal selector enabling ECU to monitor multiple vehicle subsystems through a single debug interface pin group. Use Value: Enables cost-effective hardware reuse across vehicle variants without redesigning harness or ECU pinout. |
| Embedded System Bus Arbitration | Test Equipment Signal Routing |
|
Use Scenario: Managing access to shared memory or peripheral registers between two processor cores or DMA engines in an SoC companion chip. IC Role / Device Role / Timing Role: Data path switch controlled by arbitration logic to prevent bus collisions during concurrent read/write requests. Use Value: Provides deterministic, low-latency arbitration without software overhead or complex state machines. |
Use Scenario: Configuring signal paths in automated test equipment (ATE) to route DUT outputs to oscilloscope, logic analyzer, or power meter inputs. IC Role / Device Role / Timing Role: Reconfigurable signal router enabling multi-DUT testing sequences without manual cable changes. Use Value: Increases test throughput by reducing setup time and eliminating mechanical relay wear in high-cycle production testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 2:1 multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC157APWR | Lower VCC range (1.65–3.6 V); higher ICC (max 10 µA vs. 40 µA); faster tPD (3.2 ns @ 3.3 V) | Optimized for 3.3 V-only systems; unsuitable for 5 V or mixed-voltage designs | Select when operating exclusively at 3.3 V and lowest possible propagation delay is critical. |
| 74HC157D,653 | Slower tPD (18 ns @ 4.5 V); wider VCC (2–6 V); higher ICC (max 80 µA); obsolete in new designs | Legacy replacement only; lacks AHC family's ESD robustness and 125 °C rating | Use only for backward-compatible repairs where AHC speed and temperature specs are not required. |
Compared with SN74LVC157APWR and 74HC157D,653, the SN74AHC157PWRG4 uniquely balances 5 V compatibility, 125 °C operation, and sub-5 ns propagation delay - making it optimal for next-generation industrial controllers and automotive modules requiring long-term reliability and mixed-supply flexibility.
Availability
SN74AHC157PWRG4 is available at Aetrix Electronics and suitable for industrial automation, automotive diagnostics, and embedded test equipment requiring stable component supply, extended temperature support, and RoHS-compliant packaging.
Supply support for SN74AHC157PWRG4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with over 90 years of innovation in high-reliability electronic components.
The SN74AHC157PWRG4 belongs to TI's Advanced High-Speed CMOS (AHC) logic family, designed for low-power, high-speed digital signal routing in industrial, automotive, and communications infrastructure applications.
FAQ
What is the maximum operating temperature for SN74AHC157PWRG4?
The SN74AHC157PWRG4 is rated for continuous operation from –40 °C to +125 °C ambient temperature. This specification is verified per JEDEC JESD22-A108 and applies to the full recommended voltage range (2 V to 5.5 V). The device's thermal resistance (RθJA = 135.9 °C/W for PW package) supports this rating when mounted on a standard 2-layer PCB with adequate copper area.
Does SN74AHC157PWRG4 require external pull-up resistors on its outputs?
No, SN74AHC157PWRG4 does not require external pull-up resistors. Its totem-pole outputs provide rail-to-rail VOH and VOL performance - VOH ≥ 4.4 V and VOL ≤ 0.1 V at VCC = 4.5 V and 8 mA load. Pull-ups are unnecessary unless interfacing with open-drain buses or specific legacy logic families requiring weak-high states.
Can SN74AHC157PWRG4 operate with a 2.5 V supply?
Yes, SN74AHC157PWRG4 is fully specified for 2.5 V operation. At VCC = 2.5 V, it delivers VOH ≥ 2.4 V, VOL ≤ 0.1 V, and tPD ≤ 9.7 ns (CL = 15 pF), meeting AHC family performance guarantees. Input thresholds scale proportionally (VIH ≥ 1.75 V, VIL ≤ 0.75 V), ensuring reliable switching with 2.5 V logic sources.
What is the function of the G (strobe) pin on SN74AHC157PWRG4?
The G pin on SN74AHC157PWRG4 is an active-low strobe that globally enables or disables all four multiplexer outputs. When G = HIGH, all Y outputs are forced LOW regardless of A/B or data inputs. When G = LOW, the device performs normal 2:1 selection. This feature enables synchronized channel switching and prevents bus contention during reconfiguration.
Is SN74AHC157PWRG4 pin-compatible with SN74AHC157PWR?
Yes, SN74AHC157PWRG4 is pin-compatible with SN74AHC157PWR. Both use identical TSSOP-16 (PW) packaging, share identical pinout and electrical specifications, and differ only in tape-and-reel packaging markings (G4 denotes TI's green-lead-free marking standard). No PCB layout changes are required when substituting SN74AHC157PWRG4 for SN74AHC157PWR.
SN74AHC157PWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Multiplexer
- Circuit:
- 4 x 2:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- 8mA, 8mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
SN74AHC157PWRG4 FAQ
1.How can I place an order for SN74AHC157PWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC157PWRG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN74AHC157PWRG4 reliable?
The price and inventory of SN74AHC157PWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC157PWRG4 is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHC157PWRG4 transactions.
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SN74AHC157PWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC157PWRG4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN74AHC157PWRG4?
For technical support, including SN74AHC157PWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC157PWRG4 requirements.
6.How does Aetrix verify that SN74AHC157PWRG4 is sourced from the original manufacturer or authorized distributors?
All SN74AHC157PWRG4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74AHC157PWRG4 meets industry standards.
7.What is the process for return or replacement of SN74AHC157PWRG4?
All SN74AHC157PWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC157PWRG4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74AHC157PWRG4 part is unused and in its original packaging.
Return procedure for SN74AHC157PWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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