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Texas Instruments CD74HCT157M96
- Part No.:
- CD74HCT157M96
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD74HCT157M96.pdf
- Description:
- IC MULTIPLEXER 4 X 2:1 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,381
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Product details
Overview
CD74HCT157M96 from Texas Instruments is a quad 2-input non-inverting multiplexer IC operating at 4.5V–5.5V, featuring active-low enable (E), common select (S), and guaranteed 25mA output drive capability. It delivers 29ns max propagation delay (data-to-output, VCC = 4.5V, -40°C to +85°C), supports -55°C to +125°C operation, and is used in register-to-bus data routing and logic function generation.
For engineers reviewing the CD74HCT157M96 datasheet, CD74HCT157M96 pinout, CD74HCT157M96 application, or CD74HCT157M96 equivalent, key selection criteria include LSTTL-compatible input thresholds (VIL ≤ 0.8V, VIH ≥ 2.0V), SOIC-16 package compatibility, quad-channel 2:1 switching architecture, and industrial/military temperature range support.
Technical Context
The CD74HCT157M96 implements four independent 2:1 multiplexers sharing one Select (S) and one active-low Enable (E) control line. Its outputs (1Y–4Y) are forced low when E is high, regardless of S or data inputs - enabling clean bus isolation during disable.
It uses HCT-series CMOS technology with TTL-level input compatibility and rail-to-rail CMOS output swing. Propagation delays are balanced across channels (tPLH ≈ tPHL), and input transition times are specified for tr/tf = 6ns, ensuring predictable timing in synchronous digital systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | HCT - TTL-compatible inputs, CMOS outputs, 4.5V–5.5V supply |
| Operating Temperature | -55°C to +125°C - qualified for extended industrial and military applications |
| Propagation Delay | 29ns max (data-to-output, CL = 50pF, VCC = 4.5V, -40°C to +85°C) - enables reliable 30+ MHz switching |
| Output Drive | ±25mA per output - sufficient to drive 10 LSTTL loads or directly interface with legacy logic |
| Input Thresholds | VIL ≤ 0.8V (max), VIH ≥ 2.0V (min) at VCC = 4.5V–5.5V - ensures robust noise margin vs. standard TTL |
| Power Dissipation | CPD = 70pF - used to calculate dynamic power: PD = VCC² × fi × (CPD + CL) |
| Input Leakage | ±1µA max (VCC = 5.5V, -55°C to +125°C) - negligible loading on upstream drivers |
Pinout & Package
CD74HCT157M96 is supplied in a 16-pin SOIC (D) package with 1.27mm pitch, JEDEC MS-012 compliant, moisture sensitivity level 1 (260°C reflow compatible), and tape-and-reel packaging (2500 units/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (E) | Active-Low Enable | When high, forces all outputs (1Y–4Y) low - enables global channel disable without affecting select/data lines |
| 2 (1I0) | Channel 1 Input 0 | First data source for multiplexer 1; selected when S = low |
| 3 (1I1) | Channel 1 Input 1 | Second data source for multiplexer 1; selected when S = high |
| 4 (1Y) | Channel 1 Output | Non-inverting output of multiplexer 1; reflects selected input (1I0 or 1I1) |
| 5 (2I0) | Channel 2 Input 0 | First data source for multiplexer 2; synchronized to same S and E controls |
| 6 (2I1) | Channel 2 Input 1 | Second data source for multiplexer 2; shares S/E with all channels |
| 7 (GND) | Ground Reference | Primary return path for logic and output current; must be low-impedance for noise immunity |
| 8 (2Y) | Channel 2 Output | Non-inverting output of multiplexer 2; matches timing and drive of 1Y |
| 9 (3I0) | Channel 3 Input 0 | First data source for multiplexer 3; part of quad parallel structure |
| 10 (3I1) | Channel 3 Input 1 | Second data source for multiplexer 3; identical electrical behavior to 1I0/1I1 |
| 11 (3Y) | Channel 3 Output | Non-inverting output of multiplexer 3; maintains channel-to-channel skew < 3ns |
| 12 (4I0) | Channel 4 Input 0 | First data source for multiplexer 4; completes quad set |
| 13 (4I1) | Channel 4 Input 1 | Second data source for multiplexer 4; fully buffered with 10 LSTTL fanout |
| 14 (4Y) | Channel 4 Output | Non-inverting output of multiplexer 4; electrically identical to 1Y–3Y |
| 15 (S) | Common Select | Global 1-bit control determining which input pair (I0 or I1) routes to each Y output |
| 16 (VCC) | Positive Supply | 4.5V–5.5V CMOS supply; decoupling capacitor required within 10mm of pin for stable switching |
Key Features
| Feature | Design Value |
|---|---|
| Direct LSTTL input compatibility | VIL ≤ 0.8V and VIH ≥ 2.0V at VCC = 4.5V–5.5V - eliminates level-shifting in mixed-logic systems |
| Quad independent 2:1 multiplexing | Four matched channels sharing S/E - reduces component count vs. discrete gate solutions |
| Balanced propagation delay | tPLH and tPHL differ by ≤ 3ns (typical) - minimizes skew in parallel data paths |
| High noise immunity | NIL = NIH = 30% of VCC at VCC = 5V - suppresses EMI-induced glitches in noisy environments |
| Low quiescent current | ICC ≤ 160µA max (-55°C to +125°C) - suitable for low-power standby modes |
Applications
| Register File Data Routing | Legacy System Bus Interface |
|---|---|
Use Scenario: Selecting between two banks of CPU registers (e.g., general-purpose vs. shadow registers) during context switch. IC Role / Device Role / Timing Role: Quad 2:1 multiplexer providing simultaneous 4-bit data path selection under single S/E control. Use Value: Enables atomic register bank swap with <30ns propagation delay and zero additional glue logic. | Use Scenario: Interfacing an 8-bit microcontroller data bus to dual peripheral address spaces (e.g., memory-mapped I/O and RAM). IC Role / Device Role / Timing Role: Non-inverting multiplexer selecting between two 4-bit peripheral data sources routed to upper/lower nibble of bus. Use Value: Maintains TTL-compatible voltage levels and drives 10 LSTTL loads without buffering. |
| Programmable Logic Function Generator | Industrial Control Signal Multiplexing |
Use Scenario: Implementing custom combinational logic (e.g., XOR, AND-OR-INVERT) using fixed input patterns and S/E as configuration bits. IC Role / Device Role / Timing Role: Reconfigurable 4-bit logic block where I0/I1 pins serve as truth table inputs and S selects function mode. Use Value: Reduces FPGA or PAL usage in cost-sensitive controllers needing static logic functions. | Use Scenario: Consolidating sensor readings (temperature, pressure, flow) onto a shared ADC input channel in PLC modules. IC Role / Device Role / Timing Role: Analog-signal-capable digital multiplexer routing four DC-coupled sensor outputs under microcontroller S/E control. Use Value: Supports -55°C to +125°C operation and withstands ±20mA fault currents on inputs/outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 2-input multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT157DR | Same logic function, pinout, and HCT specs; TI's newer catalog version with updated qualification and RoHS compliance. | No functional difference; identical timing, drive, and temperature range (-40°C to +85°C only). | Select SN74HCT157DR for new designs requiring commercial-temperature support and latest TI manufacturing process. |
| MC74HCT157ADR2G | Pin-compatible HCT multiplexer from ON Semiconductor; VIH/VIL thresholds match CD74HCT157M96 within 50mV. | Specified for -40°C to +125°C (not -55°C); CPD = 65pF vs. 70pF - slightly lower dynamic power. | Choose MC74HCT157ADR2G when full -55°C operation is not required and multi-source supply chain diversification is needed. |
Compared with SN74HCT157DR and MC74HCT157ADR2G, CD74HCT157M96 uniquely supports -55°C operation and is qualified for military-grade reliability per QML standards, making it the only option among the three for extended cold-environment or defense applications.
Availability
CD74HCT157M96 is available at Aetrix Electronics and suitable for industrial control systems, aerospace avionics interfaces, and military-grade data acquisition requiring stable component supply across extreme temperature ranges.
Supply support for CD74HCT157M96 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 logic ICs, with over 90 years of innovation in high-reliability components.
CD74HCT157M96 belongs to TI's CD74HC/HCT high-speed CMOS logic family, designed specifically for drop-in replacement of legacy TTL in industrial, automotive, and defense systems requiring wide temperature operation and low power.
FAQ
What is the maximum clock/data frequency supported by CD74HCT157M96?
The CD74HCT157M96 does not operate on a clock signal - it is a combinational logic device. Its usable data switching rate is determined by propagation delay: with 29ns max tPLH/tPHL (VCC = 4.5V), it reliably supports input data transitions up to ~30 MHz in systems with adequate setup/hold margins. The device has no internal clock or latch functionality.
Does CD74HCT157M96 support 3.3V logic interfacing?
No - CD74HCT157M96 requires a 4.5V–5.5V supply and is not 3.3V tolerant. Its HCT inputs are designed for TTL-level compatibility (VIH ≥ 2.0V), but applying 3.3V signals directly to inputs while VCC = 5V is acceptable; however, driving it from a 3.3V-only system without level translation violates VIH min specification and risks unreliable operation. Use CD74HC157M96 for 2V–6V operation including 3.3V.
Is CD74HCT157M96 pin-compatible with CD74HC157M96?
Yes - CD74HCT157M96 and CD74HC157M96 share identical SOIC-16 pinout, terminal functions, and package dimensions. However, they differ in supply voltage range (HCT: 4.5–5.5V; HC: 2–6V) and input threshold behavior (HCT matches TTL, HC matches CMOS). Swapping them requires verifying VCC and input source compatibility.
What does the "M96" suffix indicate in CD74HCT157M96?
The "M96" suffix denotes a 16-pin SOIC (D) package supplied in tape-and-reel format with 2500 units per reel. "M" specifies the SOIC package type, and "96" is Texas Instruments' standard ordering code for large-volume tape-and-reel delivery - distinct from "MT" (small-reel, 250 units) or "E" (PDIP tube).
Can CD74HCT157M96 drive LEDs directly?
Yes - CD74HCT157M96 can sink or source up to 25mA per output, sufficient to drive standard 5mm through-hole LEDs (typically 10–20mA) with appropriate series resistors. For example, with VCC = 5V and a red LED (VF ≈ 1.8V), a 150Ω resistor limits current to ~21mA. Ensure total ICC remains within 50mA and thermal limits are observed during sustained operation.
CD74HCT157M96 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HCT
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Multiplexer
- Circuit:
- 4 x 2:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- 4mA, 4mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
CD74HCT157M96 FAQ
1.How can I place an order for CD74HCT157M96 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HCT157M96 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 CD74HCT157M96 reliable?
The price and inventory of CD74HCT157M96 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HCT157M96 is usually 5 days.
3.What payment methods are accepted for CD74HCT157M96?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HCT157M96 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HCT157M96?
CD74HCT157M96 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HCT157M96 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 CD74HCT157M96?
For technical support, including CD74HCT157M96 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HCT157M96 requirements.
6.How does Aetrix verify that CD74HCT157M96 is sourced from the original manufacturer or authorized distributors?
All CD74HCT157M96 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 CD74HCT157M96 meets industry standards.
7.What is the process for return or replacement of CD74HCT157M96?
All CD74HCT157M96 units undergo pre-shipment inspection (PSI). If there is an issue with CD74HCT157M96, 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 CD74HCT157M96 part is unused and in its original packaging.
Return procedure for CD74HCT157M96:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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