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Texas Instruments CD74HCT157M96G4
- Part No.:
- CD74HCT157M96G4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD74HCT157M96G4.pdf
- Description:
- IC QUAD 2-IN MUX HS 16-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,442
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Product details
Overview
CD74HCT157M96G4 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 per channel. It delivers 27ns max propagation delay (data-to-output, VCC = 4.5V, CL = 50pF) and supports industrial temperature range (–55°C to +125°C). It is used in register-to-bus data routing and logic function generation within digital control subsystems.
For engineers reviewing the CD74HCT157M96G4 datasheet, CD74HCT157M96G4 pinout, CD74HCT157M96G4 application, or CD74HCT157M96G4 equivalent, key selection criteria include LSTTL-compatible input thresholds (VIL ≤ 0.8V, VIH ≥ 2.0V), SOIC-16 package compatibility, enable-controlled output disable behavior, and HCT-series noise immunity with balanced transition times.
Technical Context
The CD74HCT157M96G4 implements four independent 2:1 multiplexers sharing one Select (S) input and one active-low Enable (E) input. When E is high, all outputs (1Y–4Y) are forced low-no pass-through occurs. The device uses CMOS circuitry with TTL-level input compatibility, enabling direct interfacing with legacy LSTTL logic without level-shifting.
Its switching performance is characterized by matched tPLH/tPHL delays across channels, low output transition time (15ns typical, CL = 50pF), and minimal skew between parallel paths. Input loading is defined per pin: S draws 3 unit loads (360µA at 25°C), while I0/I1 inputs draw 0.95 unit loads each.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5V to 5.5V - ensures direct drop-in replacement for 5V LSTTL systems without regulator redesign. |
| Input Logic Compatibility | VIL ≤ 0.8V (max), VIH ≥ 2.0V (min) - guarantees reliable recognition of standard TTL output levels. |
| Propagation Delay (Data→Output) | 27ns (max, VCC = 4.5V, CL = 50pF) - enables operation in 25MHz+ synchronous bus applications. |
| Output Drive Capability | ±25mA per output - supports direct driving of multiple LSTTL loads (fanout ≥ 10) without buffers. |
| Operating Temperature Range | –55°C to +125°C - qualified for extended industrial, automotive under-hood, and military-grade environments. |
| Power Dissipation Capacitance | 70pF - used with supply voltage and input frequency to calculate dynamic power: PD = VCC² × fi × (CPD + CL). |
| Input Leakage Current | ±1µA (max, –55°C to +125°C) - ensures stable DC bias integrity in high-impedance control paths. |
Pinout & Package
CD74HCT157M96G4 is housed in a 16-pin SOIC (Small Outline Integrated Circuit) package, 3.9mm body width, RoHS-compliant, tape-and-reel format (2500 pcs/reel), MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (E) | Active-Low Enable | When high, forces all outputs (1Y–4Y) low; when low, enables multiplexer action based on S and data inputs. |
| 2 (1I0) | Data Input 0, Channel 1 | First source bit for output 1Y; selected when S = low. |
| 3 (1I1) | Data Input 1, Channel 1 | Second source bit for output 1Y; selected when S = high. |
| 4 (1Y) | Non-Inverting Output, Channel 1 | Passes selected input (1I0 or 1I1) without inversion; drives up to 10 LSTTL loads. |
| 5 (2I0) | Data Input 0, Channel 2 | First source bit for output 2Y; synchronized with S and E timing. |
| 6 (2I1) | Data Input 1, Channel 2 | Second source bit for output 2Y; shares same S/E control as other channels. |
| 7 (GND) | Ground Reference | Primary return path for all internal logic and output current; must be low-impedance for noise immunity. |
| 8 (2Y) | Non-Inverting Output, Channel 2 | Matches 1Y timing and drive strength; supports parallel bus construction. |
| 9 (3I0) | Data Input 0, Channel 3 | Third independent 2:1 input pair; identical electrical specs to 1I0/1I1. |
| 10 (3I1) | Data Input 1, Channel 3 | Complements 3I0; no crosstalk or timing dependency on other channels. |
| 11 (3Y) | Non-Inverting Output, Channel 3 | Provides third routed data path; maintains <1ns inter-channel skew under matched load. |
| 12 (4I0) | Data Input 0, Channel 4 | Final input pair; fully decoupled electrically from prior channels. |
| 13 (4I1) | Data Input 1, Channel 4 | Supports full 4-bit-wide multiplexing; compatible with synchronous latch interfaces. |
| 14 (4Y) | Non-Inverting Output, Channel 4 | Completes quad functionality; output valid within 27ns of data/enable/select stabilization. |
| 15 (S) | Common Select Input | Single control line determining which input (I0 or I1) is passed to all four outputs simultaneously. |
| 16 (VCC) | Positive Supply | 4.5V–5.5V CMOS rail; bypass capacitor (0.1µF) required adjacent to pin for transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Direct LSTTL input compatibility | Eliminates need for external level shifters when interfacing with legacy 5V TTL logic families. |
| Common select + individual enable architecture | Reduces control signal count in multi-channel data routing-only two pins manage all four mux paths. |
| Balanced propagation delay & transition times | Ensures deterministic setup/hold timing across all four outputs, critical for synchronous bus arbitration. |
| High noise immunity (NIL/NIH = 30% of VCC) | Guarantees robust operation in electrically noisy industrial environments with >1.5V noise margin at 5V. |
| Wide temperature range (–55°C to +125°C) | Validated for use in uncontrolled ambient conditions such as motor control enclosures or aerospace avionics bays. |
Applications
| Industrial PLC I/O Expansion | Digital Test Equipment Signal Routing |
|---|---|
Use Scenario: Expanding discrete input acquisition from dual sensor banks into a single 4-bit status bus feeding an FPGA-based controller. IC Role / Device Role / Timing Role: Quad 2:1 selector routing either bank A or bank B signals to shared data lines; E synchronizes with scan cycle start. Use Value: Reduces PCB trace count by 50% versus discrete mux ICs; enables real-time bank switching without glitching due to simultaneous channel enable. |
Use Scenario: Configuring stimulus signal paths between pattern generator outputs and DUT input pins during automated functional test. IC Role / Device Role / Timing Role: Multiplexing four independent test vectors onto a common probe interface; S selects vector set, E gates delivery. Use Value: Achieves sub-30ns path reconfiguration latency, meeting tight test cycle timing budgets; eliminates mechanical relay wear. |
| Automotive Body Control Module | Legacy System Interface Adapter |
Use Scenario: Consolidating door lock, window lift, mirror adjust, and interior light status signals from separate microcontrollers into a central CAN gateway. IC Role / Device Role / Timing Role: Non-inverting data selector translating local MCU GPIO states into time-multiplexed diagnostic bus words. Use Value: Maintains signal polarity integrity across temperature extremes; withstands automotive load dump transients via robust VCC/GND design. |
Use Scenario: Bridging a modern ARM-based controller (3.3V logic) to legacy 5V peripheral subsystems using discrete gate logic. IC Role / Device Role / Timing Role: Level-tolerant multiplexer enabling bidirectional 5V data flow while preserving TTL-compatible thresholds. Use Value: Avoids costly redesign of legacy peripherals; supports mixed-voltage system upgrades without replacing entire backplane. |
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 pinout, identical AC/DC specs, TI-manufactured; differs only in tape-and-reel quantity (2500 vs. 2500) and marking (HCT157DR vs. HCT157M). | Identical functional behavior; validated for same industrial temp range and 5V systems. | Select SN74HCT157DR if requiring TI's current-generation HCT157 die revision with updated process control. |
| MC74HCT157ADR2G | Pin-compatible SOIC-16; VIL/VIH thresholds match (0.8V/2.0V); max tPLH = 30ns (vs. 27ns) at 4.5V/50pF. | Suitable for less timing-critical 5V systems where 3ns delay margin is acceptable. | Choose MC74HCT157ADR2G when sourcing from ON Semiconductor's production line or requiring alternate supply chain diversification. |
Compared with CD74HCT157M96G4, SN74HCT157DR offers identical timing and drive but reflects TI's latest manufacturing release, while MC74HCT157ADR2G trades 3ns delay margin for second-source availability-both retain full functional and pin compatibility in 5V logic designs.
Availability
CD74HCT157M96G4 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74HCT157M96G4 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 solutions, with over 90 years of innovation in high-reliability components.
CD74HCT157M96G4 belongs to TI's CD74HCT high-speed CMOS logic family, designed specifically for seamless integration into 5V mixed-technology systems requiring TTL-compatible inputs and robust industrial-grade operation.
FAQ
What is the maximum clock/data toggle rate supported by CD74HCT157M96G4?
The CD74HCT157M96G4 does not operate on a clock signal-it is combinational logic. Its usable data rate depends on propagation delay and system timing margins. With a max tPLH/tPHL of 27ns (VCC = 4.5V, CL = 50pF), it supports reliable operation up to approximately 25MHz in synchronous bus applications where setup/hold times are met. The CD74HCT157M96G4 datasheet specifies no minimum pulse width, but input transitions must exceed 6ns rise/fall time for guaranteed timing compliance.
Does CD74HCT157M96G4 support partial power-down or I/O isolation when VCC is removed?
No. CD74HCT157M96G4 lacks Ioff protection or power-down mode. If VCC is removed while inputs remain driven, current may flow through internal clamping diodes, risking damage or unintended output states. Always power VCC before applying input signals, and use external isolation (e.g., series resistors or bus switches) in hot-swap scenarios. This limitation applies identically across all CD74HCT157M96G4 units.
Can CD74HCT157M96G4 drive a 50pF PCB trace directly without a buffer?
Yes. The CD74HCT157M96G4 is characterized with CL = 50pF in its switching specifications and delivers 27ns max propagation delay under that load. Its ±25mA output drive capability exceeds the current needed to charge/discharge 50pF within that timing window at 5V. For longer traces or higher capacitive loads (>75pF), consider adding a series resistor or local buffer to maintain edge integrity and reduce ringing-verified in CD74HCT157M96G4 application notes.
Is CD74HCT157M96G4 pin-compatible with CD74HC157M96?
Yes-CD74HCT157M96G4 and CD74HC157M96 share identical SOIC-16 pinout, pin functions, and physical dimensions. However, CD74HC157M96 operates from 2V–6V and has different input thresholds (VIH ≥ 3.15V at 4.5V), making it incompatible with LSTTL outputs. CD74HCT157M96G4 is the correct choice when interfacing with standard 5V TTL logic; substituting CD74HC157M96 risks input recognition failure.
What does the "G4" suffix mean in CD74HCT157M96G4?
The "G4" suffix in CD74HCT157M96G4 is a Texas Instruments packaging and quality grade identifier indicating the device meets Green (RoHS-compliant, lead-free) and Grade 4 (extended temperature, –55°C to +125°C) specifications. It confirms the part is assembled in an SOIC-D package with NiPdAu lead finish, MSL Level-1 rating, and full qualification per TI's military/industrial standards-distinct from commercial-grade variants.
CD74HCT157M96G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HCT
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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
CD74HCT157M96G4 FAQ
1.How can I place an order for CD74HCT157M96G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HCT157M96G4 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 CD74HCT157M96G4 reliable?
The price and inventory of CD74HCT157M96G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HCT157M96G4 is usually 5 days.
3.What payment methods are accepted for CD74HCT157M96G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HCT157M96G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HCT157M96G4?
CD74HCT157M96G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HCT157M96G4 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 CD74HCT157M96G4?
For technical support, including CD74HCT157M96G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HCT157M96G4 requirements.
6.How does Aetrix verify that CD74HCT157M96G4 is sourced from the original manufacturer or authorized distributors?
All CD74HCT157M96G4 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 CD74HCT157M96G4 meets industry standards.
7.What is the process for return or replacement of CD74HCT157M96G4?
All CD74HCT157M96G4 units undergo pre-shipment inspection (PSI). If there is an issue with CD74HCT157M96G4, 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 CD74HCT157M96G4 part is unused and in its original packaging.
Return procedure for CD74HCT157M96G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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