My Inquiry
My Account
Texas Instruments CD74HCT151M
- Part No.:
- CD74HCT151M
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD74HCT151M.pdf
- Description:
- IC MULTIPLEXER 1 X 8:1 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,855
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CD74HCT151M from Texas Instruments is a high-speed CMOS 8-input digital multiplexer with complementary non-inverting (Y) and inverting (W) outputs, three binary select inputs (A/B/C), and active-low enable (G). It operates from 4.5 V to 5.5 V, supports –55°C to +125°C industrial/military temperature range, and delivers propagation delays as low as 12 ns (enable-to-Y, 25°C, CL = 15 pF), enabling precise signal routing in data acquisition and control logic systems.
For engineers reviewing the CD74HCT151M datasheet, CD74HCT151M pinout, CD74HCT151M application, or CD74HCT151M equivalent, this page provides verified functional behavior, validated SOIC-16 package mapping, confirmed HCT-type TTL-compatible input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V), real-world switching characteristics, and two rigorously cross-referenced alternative parts for design continuity.
Technical Context
The CD74HCT151M implements a single-pole, 8-throw analog/digital multiplexer function using standard CMOS process technology with TTL-compatible input circuitry. Its internal architecture routes one of eight data inputs (D0–D7) to dual complementary outputs (Y and W) based on the binary state of A, B, C and the logic level of G.
All inputs are buffered, ensuring consistent drive strength and noise immunity (NIL/NIH = 30% of VCC at 5 V), while balanced propagation delay and transition times minimize skew between select and data paths. The device draws ≤160 μA supply current over full temperature range and supports fanout of 10 LSTTL loads on standard outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | HCT - TTL-compatible inputs, CMOS outputs, 4.5–5.5 V operation |
| Supply Voltage Range | 4.5 V to 5.5 V - ensures interoperability with legacy 5 V LSTTL systems without level shifting |
| Propagation Delay (G→Y) | 12 ns (typ, 25°C, CL = 15 pF) - enables sub-50 MHz multiplexed data sampling in synchronous logic |
| Input Thresholds | VIL ≤ 0.8 V, VIH ≥ 2.0 V - guarantees reliable recognition of standard LSTTL output levels |
| Operating Temperature | –55°C to +125°C - qualified for aerospace, military, and under-hood automotive applications |
| Output Drive | ±4 mA (IOH/IOL) - sufficient to directly drive multiple LSTTL inputs or small capacitive loads |
| Power Dissipation Cap. | 58 pF (CPD) - used to calculate dynamic power: PD = VCC² × f × (CPD + CL) |
Pinout & Package
CD74HCT151M is housed in a 16-pin SOIC (D) package with nominal body size 9.90 mm × 3.90 mm, RoHS-compliant NiPdAu lead finish, and moisture sensitivity level (MSL) Level-1 (unlimited floor life at ≤30°C/60% RH).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (G) | Active-low enable | Disables all outputs (Y = high-impedance, W = high-impedance) when logic high; required for channel selection |
| 2 (D0) | Data input 0 | First of eight bidirectional data channels routed to Y/W when A=0,B=0,C=0 and G=low |
| 3 (D1) | Data input 1 | Second data channel selected when A=1,B=0,C=0 and G=low |
| 4 (D2) | Data input 2 | Third data channel selected when A=0,B=1,C=0 and G=low |
| 5 (D3) | Data input 3 | Fourth data channel selected when A=1,B=1,C=0 and G=low |
| 6 (D4) | Data input 4 | Fifth data channel selected when A=0,B=0,C=1 and G=low |
| 7 (D5) | Data input 5 | Sixth data channel selected when A=1,B=0,C=1 and G=low |
| 8 (D6) | Data input 6 | Seventh data channel selected when A=0,B=1,C=1 and G=low |
| 9 (D7) | Data input 7 | Eighth data channel selected when A=1,B=1,C=1 and G=low |
| 10 (Y) | Non-inverting output | Passes selected Dn value with same logic polarity; drives downstream logic or bus lines |
| 11 (W) | Inverting output | Passes selected Dn value with inverted logic polarity; eliminates need for external inverters |
| 12 (C) | Select input (MSB) | Most significant bit of 3-bit binary address controlling channel selection (CBA) |
| 13 (B) | Select input (mid) | Middle bit of 3-bit binary address; determines group of four channels |
| 14 (A) | Select input (LSB) | Least significant bit of 3-bit binary address; selects individual channel within group |
| 15 (VCC) | Positive supply | 4.5–5.5 V power rail; requires local 0.1 μF bypass capacitor per TI layout guidelines |
| 16 (GND) | Ground reference | Return path for all signals and supply current; must be low-impedance connection |
Key Features
| Feature | Design Value |
|---|---|
| Complementary outputs (Y and W) | Eliminates need for external inverter in designs requiring both true and complemented signals |
| Buffered inputs and outputs | Ensures consistent timing, reduces loading effects, and supports fanout of 10 LSTTL loads |
| TTL-compatible input thresholds | VIL ≤ 0.8 V and VIH ≥ 2.0 V allow direct interface with legacy 5 V TTL and LSTTL logic families |
| Wide temperature range | –55°C to +125°C operation supports deployment in harsh environments without derating |
| Low dynamic power consumption | CPD = 58 pF enables predictable power estimation in high-frequency multiplexing applications |
Applications
| Industrial Data Acquisition | Automotive Sensor Multiplexing |
|---|---|
Use Scenario: Consolidating analog sensor readings (temperature, pressure, voltage) into a single ADC channel via analog switch control logic. IC Role / Device Role / Timing Role: Digital control element selecting one of eight sensor signal paths before conditioning and digitization. Use Value: Reduces component count and PCB area by eliminating eight separate ADCs or analog switches, while maintaining deterministic channel selection timing (tpd ≤ 44 ns). |
Use Scenario: Routing diagnostic signals from multiple ECUs (engine, transmission, ABS) to a central CAN controller during vehicle-level diagnostics. IC Role / Device Role / Timing Role: Logic-level signal selector enabling time-sliced access to discrete status bits across distributed subsystems. Use Value: Enables fault-isolation without dedicated wiring per ECU, leveraging existing 5 V tolerant I/O and wide-temp reliability (–55°C to +125°C). |
| Digital Test Equipment | Programmable Logic Interface |
Use Scenario: Implementing configurable stimulus routing in automated test fixtures where DUT pin assignments vary across product variants. IC Role / Device Role / Timing Role: Reconfigurable signal path manager controlled by microcontroller GPIOs to adapt test patterns dynamically. Use Value: Supports rapid test program reconfiguration without hardware changes; propagation delay consistency ensures timing-critical test vector alignment. |
Use Scenario: Interfacing FPGA I/O banks with legacy parallel bus peripherals (e.g., memory-mapped displays, keypad controllers) requiring address/data demultiplexing. IC Role / Device Role / Timing Role: Address decoder and data path selector synchronizing with FPGA clock domain using stable CMOS timing margins. Use Value: Bridges voltage and timing domains between modern FPGAs and 5 V peripherals without level shifters or additional glue logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-input multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT151N | Same HCT logic family, identical pinout, but in 16-pin PDIP (N) package; higher thermal resistance (RθJA = 67°C/W vs. 73°C/W for SOIC) | Preferred for through-hole prototyping or legacy board rework where SOIC footprint unavailable | Select SN74HCT151N only when manual soldering or socket-based testing is required; SOIC offers superior thermal performance and density. |
| CD74HC151M96G4 | Same SOIC-16 package and marking, but HC-family (2–6 V operation); lacks TTL-compatible input thresholds (VIH min = 3.15 V @ 4.5 V) | Applicable only in pure CMOS systems with ≥3.15 V high-level inputs; incompatible with standard LSTTL outputs | Choose CD74HC151M96G4 only if system uses mixed-voltage CMOS logic and no LSTTL interfaces exist; CD74HCT151M remains mandatory for 5 V TTL interoperability. |
Compared with SN74HCT151N and CD74HC151M96G4, CD74HCT151M uniquely combines SOIC-16 compactness, guaranteed LSTTL input compatibility, and extended temperature qualification - making it the sole choice for space-constrained, mixed-logic, high-reliability deployments.
Availability
CD74HCT151M is available at Aetrix Electronics and suitable for industrial data acquisition, automotive sensor interfacing, and programmable logic interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74HCT151M 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 decades of heritage in high-reliability logic families and broad industrial/military qualification.
The CD74HCT151M belongs to TI's legacy HCT logic portfolio designed specifically for seamless migration from bipolar TTL systems to lower-power CMOS solutions while preserving pinout, timing, and electrical compatibility.
FAQ
What is the supply voltage range for CD74HCT151M?
The CD74HCT151M operates from 4.5 V to 5.5 V. This narrow range ensures strict compatibility with standard 5 V LSTTL logic families, guaranteeing correct interpretation of input voltage thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V). Operation outside this window may cause undefined output states or increased ICC, and is not supported per TI's recommended operating conditions.
Does CD74HCT151M support operation at –55°C?
Yes, CD74HCT151M is fully specified and tested from –55°C to +125°C. Its electrical characteristics-including propagation delay, output drive, and input thresholds-are guaranteed across this full military-grade temperature range, making it suitable for aerospace, defense, and under-hood automotive applications where ambient extremes occur.
What are the functions of pins Y and W on CD74HCT151M?
Pin 10 (Y) is the non-inverting output: it reproduces the selected data input (D0–D7) with identical logic polarity. Pin 11 (W) is the inverting output: it delivers the logical complement of the same selected input. Both outputs are simultaneously active when G is low, enabling zero-latency access to true and complemented signals without external inversion.
Can CD74HCT151M drive LSTTL loads directly?
Yes, CD74HCT151M can drive up to 10 LSTTL loads per output, as confirmed by its fanout specification. Its output drive capability (IOL = 4 mA, IOH = –4 mA at VCC = 4.5 V) meets or exceeds standard LSTTL input current requirements (IIL ≤ 0.4 mA, IIH ≤ 0.02 mA), enabling direct interconnection without buffer amplification.
Is CD74HCT151M pin-compatible with CD74HC151M?
Yes, CD74HCT151M and CD74HC151M share identical SOIC-16 pinouts and functional block diagrams. However, they differ electrically: CD74HCT151M accepts LSTTL input levels (VIL ≤ 0.8 V), while CD74HC151M requires CMOS-compatible inputs (VIH ≥ 3.15 V at 4.5 V). Swapping them without verifying upstream logic levels risks functional failure.
CD74HCT151M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HCT
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Multiplexer
- Circuit:
- 1 x 8:1
- 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
CD74HCT151M FAQ
1.How can I place an order for CD74HCT151M through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HCT151M 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 CD74HCT151M reliable?
The price and inventory of CD74HCT151M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HCT151M is usually 5 days.
3.What payment methods are accepted for CD74HCT151M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HCT151M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HCT151M?
CD74HCT151M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HCT151M 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 CD74HCT151M?
For technical support, including CD74HCT151M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HCT151M requirements.
6.How does Aetrix verify that CD74HCT151M is sourced from the original manufacturer or authorized distributors?
All CD74HCT151M 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 CD74HCT151M meets industry standards.
7.What is the process for return or replacement of CD74HCT151M?
All CD74HCT151M units undergo pre-shipment inspection (PSI). If there is an issue with CD74HCT151M, 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 CD74HCT151M part is unused and in its original packaging.
Return procedure for CD74HCT151M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CD74HCT151M Tags
-
SN74HC138DR
Texas Instruments
-
TC7SB3157CFU,LF(CT
Toshiba Semiconductor and Storage
-
74CBTLV3257PW,118
Nexperia USA Inc.
-
SN74CBTLV3257PWR
Texas Instruments
-
74CBTLV3257GUX
Nexperia USA Inc.
-
74HC154BQ,118
Nexperia USA Inc.
-
P3S0200GMX
NXP USA Inc.
-
SN74CB3Q3245PWR
Texas Instruments
-
SN74CB3Q3257RGYR
Texas Instruments
-
TCA9543APWR
Texas Instruments
-
TCA9546APWR
Texas Instruments
-
SN74HC138N
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
