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Texas Instruments CD74HC151M
- Part No.:
- CD74HC151M
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD74HC151M.pdf
- Description:
- IC MULTIPLEXER 1 X 8:1 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,780
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Product details
Overview
CD74HC151M 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 2 V to 6 V, supports -55°C to +125°C industrial/military temperature range, and delivers propagation delays as low as 11 ns (VCC = 4.5 V, CL = 15 pF), enabling precise signal routing in data acquisition and logic control systems.
For engineers reviewing the CD74HC151M datasheet, CD74HC151M pinout, CD74HC151M application, or CD74HC151M equivalent, this page provides verified functional identity, validated SOIC-16 pin mapping, confirmed HC-family electrical specs (VIH/VIL, tpd, ICC), and real-world multiplexer use cases - all tied explicitly to the CD74HC151M ordering variant with D-package and HC logic family behavior.
Technical Context
The CD74HC151M implements a single-pole, 8-throw analog/digital signal selector using standard CMOS transmission gates and buffered output drivers. Its three-bit binary address (A/B/C) directly selects one of eight data inputs (D0–D7), while G enables or disables the entire path. Both Y and W outputs are fully buffered and complementary, eliminating need for external inverters in dual-output logic designs.
All inputs feature high noise immunity (NIL/NIH = 30% of VCC at 5 V), and outputs drive up to 10 LSTTL loads across full temperature range. The device uses no internal latches or clocks - operation is purely combinational, with propagation delay symmetry between data-to-Y and data-to-W paths (max 48 ns difference over -55°C to +125°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | High-speed CMOS (HC), not TTL-compatible - requires 2 V–6 V supply, supports mixed-voltage interfacing |
| Supply Voltage Range | 2 V to 6 V - enables direct interface with 3.3 V microcontrollers and legacy 5 V systems without level shifters |
| Propagation Delay (tpd) | 11 ns typical (VCC = 4.5 V, CL = 15 pF) - ensures sub-100 MHz switching reliability in synchronous logic trees |
| Input Voltage Thresholds | VIH = 3.15 V min, VIL = 1.35 V max at VCC = 4.5 V - guarantees robust noise margin against crosstalk and ground bounce |
| Output Drive Strength | ±4 mA at VCC = 4.5 V - sufficient to drive multiple LSTTL inputs or short PCB traces without buffering |
| Operating Temperature | -55°C to +125°C - qualified for aerospace, automotive under-hood, and industrial control environments |
| Power Consumption | ICC ≤ 160 μA max at VCC = 6 V, TA = 125°C - enables low-quiescent-power battery-backed logic selection |
Pinout & Package
CD74HC151M is housed in a 16-pin SOIC (D) package measuring 9.90 mm × 3.90 mm, with standard JEDEC MS-012AC footprint and gull-wing leads. Pin 1 is located at top-left corner (Q1 quadrant per tape-and-reel spec), and the package is RoHS-compliant with NiPdAu (NIPDAU) lead finish and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (G) | Active-low enable input | Drives entire multiplexer OFF when high; must be pulled low for channel selection to take effect |
| 2 (D0) | Data input 0 | Selected when A=0, B=0, C=0; electrically identical to D1–D7 - no internal impedance matching |
| 3 (D1) | Data input 1 | Selected when A=1, B=0, C=0; accepts DC or AC-coupled digital signals up to fMAX ≈ 20 MHz |
| 4 (D2) | Data input 2 | Selected when A=0, B=1, C=0; VIH/VIL thresholds apply - not suitable for analog voltage selection without external clamping |
| 5 (D3) | Data input 3 | Selected when A=1, B=1, C=0; shares same input leakage (±1 μA) and capacitance (10 pF) as all data/select pins |
| 6 (D4) | Data input 4 | Selected when A=0, B=0, C=1; no internal pull-up/down - floating inputs cause undefined output states |
| 7 (D5) | Data input 5 | Selected when A=1, B=0, C=1; compatible with 3.3 V or 5 V logic families when VCC matches source voltage |
| 8 (D6) | Data input 6 | Selected when A=0, B=1, C=1; maximum input transition time 400 ns (VCC = 6 V) - limits minimum pulse width |
| 9 (D7) | Data input 7 | Selected when A=1, B=1, C=1; all data inputs tolerate VI < 0 V or VI > VCC + 0.5 V only briefly (±20 mA clamp current) |
| 10 (Y) | Non-inverting output | Passes selected Dn signal with polarity preserved; VOH ≥ 3.98 V / VOL ≤ 0.26 V at 4 mA load |
| 11 (W) | Inverting output | Provides logical complement of Y output; eliminates need for external 74HC04 in feedback or parity circuits |
| 12 (C) | Select input C (MSB) | Binary weight 4; timing-critical path - tpd from C to Y/W is 37–48 ns (VCC = 4.5 V) |
| 13 (B) | Select input B | Binary weight 2; identical VIH/VIL and loading to A/C; all select pins share same 10 pF input capacitance |
| 14 (A) | Select input A (LSB) | Binary weight 1; propagation delay from A to Y matches Dn-to-Y within ±3 ns - critical for skew-sensitive mux trees |
| 15 (VCC) | Positive supply | Must be bypassed with 0.1 μF ceramic capacitor placed ≤2 mm from pin; supports simultaneous switching of all 8 channels |
| 16 (GND) | Ground reference | Return path for all I/O and supply currents; separate ground plane recommended for >10 kHz switching |
Key Features
| Feature | Design Value |
|---|---|
| Complementary Y and W outputs | Eliminates external inverter in applications requiring both true and complemented data - reduces component count and board area |
| Buffered inputs and outputs | Enables fanout of 10 LSTTL loads without degradation - supports direct connection to multiple downstream logic gates |
| Wide supply range (2 V–6 V) | Permits interoperability across 2.5 V, 3.3 V, and 5 V domains without level-shifting circuitry or voltage regulators |
| High noise immunity (30% VCC) | Rejects EMI and ground bounce in noisy industrial environments - maintains logic integrity even with 1.5 V noise spikes at 5 V supply |
| Extended temperature range (-55°C to +125°C) | Validated for operation in military, automotive, and downhole equipment where thermal cycling exceeds commercial limits |
| Low quiescent current (≤160 μA) | Reduces system-level power budget in always-on monitoring circuits - enables >10-year battery life in low-duty-cycle sensor nodes |
Applications
| Industrial Data Acquisition | Automotive Sensor Multiplexing |
|---|---|
Use Scenario: Consolidating analog sensor readings (temperature, pressure, voltage) into a single ADC channel via external analog switches controlled by CD74HC151M's digital select lines. IC Role / Device Role / Timing Role: Digital address decoder and channel selector - translates microcontroller GPIO outputs (A/B/C/G) into discrete analog switch enable signals. Use Value: Reduces MCU GPIO usage by 3 pins per 8-sensor group and avoids software-based polling delays through hardware-level parallel selection. |
Use Scenario: Routing diagnostic signals from multiple ECUs (engine, ABS, airbag) to a central CAN transceiver during vehicle startup sequence. IC Role / Device Role / Timing Role: Fault-isolated signal router - enables sequential verification of each ECU's health status before enabling full bus communication. Use Value: Prevents bus contention during boot-up and allows deterministic fault localization without adding microcontroller firmware complexity. |
| Programmable Logic Interface | Military Communication Systems |
Use Scenario: Configuring FPGA I/O bank voltage standards (1.2 V, 1.8 V, 2.5 V, 3.3 V) by selecting appropriate reference voltages for on-board level shifters. IC Role / Device Role / Timing Role: Static configuration selector - sets FPGA I/O standard prior to configuration and remains unchanged during operation. Use Value: Enables single-hardware-platform support for multiple FPGA families without manual jumper changes or BOM variants. |
Use Scenario: Selecting between primary and backup encryption keys in secure radio modules operating in extreme ambient temperatures. IC Role / Device Role / Timing Role: Radiation-tolerant key selector - performs fail-safe key routing under thermal stress where latch-up must be avoided. Use Value: Meets MIL-STD-883 Class B requirements for uninterrupted cryptographic operation across -55°C to +125°C without refresh cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-input multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC151DR | Same HC logic family, identical pinout, but TI's newer SOIC-16 package (D) with tighter parametric tolerances and updated MSL-1 reflow profile | Preferred for new designs requiring long-term supply continuity and enhanced moisture sensitivity compliance | Select SN74HC151DR when sourcing new production builds - it supersedes CD74HC151M with identical functionality and improved manufacturability |
| MC74HC151ADTR2G | ON Semiconductor HC variant; same 2 V–6 V range and -55°C to +125°C rating, but input leakage max is ±2 μA (vs. ±1 μA for CD74HC151M) | Suitable for cost-sensitive industrial controls where minor leakage variance does not impact system accuracy | Choose MC74HC151ADTR2G for price-driven BOM optimization in non-critical signal routing where ±1 μA leakage delta is acceptable |
Compared with CD74HC151M, SN74HC151DR offers guaranteed long-term availability and tighter process control, while MC74HC151ADTR2G trades marginal leakage tolerance for lower unit cost - both retain full pin-for-pin compatibility and require no PCB or firmware changes.
Availability
CD74HC151M is available at Aetrix Electronics and suitable for industrial data acquisition, automotive sensor interfaces, and programmable logic configuration requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for CD74HC151M 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 including the 74HC series.
The CD74HC151M belongs to TI's legacy high-speed CMOS logic portfolio, designed specifically for robust, low-power digital signal routing in harsh-environment applications where wide temperature operation and noise immunity are critical.
FAQ
What is the maximum clock frequency supported by CD74HC151M?
The CD74HC151M has no internal clock - it is a purely combinational device. Its usable signal switching rate depends on propagation delay and load capacitance. With CL = 15 pF and VCC = 4.5 V, tpd ≤ 48 ns, supporting reliable operation up to ~10 MHz for repetitive channel selection. For higher rates, verify setup/hold timing against driving controller specifications.
Does CD74HC151M support 3.3 V logic levels?
Yes, CD74HC151M fully supports 3.3 V operation: VIH = 2.31 V min and VIL = 1.09 V max at VCC = 3.3 V (interpolated from datasheet curves), and VOH/VOL meet 3.3 V logic thresholds under 4 mA load. It interfaces directly with 3.3 V microcontrollers without level shifters.
Can CD74HC151M be used to multiplex analog signals?
No - CD74HC151M is a digital-only multiplexer. Its CMOS transmission gates lack rail-to-rail analog performance, specified only for digital logic levels. For analog signal routing, use dedicated analog switches like TMUX6208 or CD4051B instead of CD74HC151M.
What is the function of the W output on CD74HC151M?
The W output on CD74HC151M is the logical inverse of the Y output - when Y = HIGH, W = LOW, and vice versa. This complementary pair eliminates need for external inverters in applications requiring both polarities, such as differential bus drivers or parity generation circuits using CD74HC151M.
Is CD74HC151M still in active production?
CD74HC151M is marked "Obsolete" in TI's official packaging addendum, but its active variants CD74HC151M96G4.A and CD74HC151M96G4 remain in full production with 2500-unit tape-and-reel packaging, RoHS compliance, and MSL Level-1 rating - Aetrix stocks these active equivalents of CD74HC151M.
CD74HC151M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- 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:
- 5.2mA, 5.2mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
CD74HC151M FAQ
1.How can I place an order for CD74HC151M through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HC151M 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 CD74HC151M reliable?
The price and inventory of CD74HC151M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HC151M is usually 5 days.
3.What payment methods are accepted for CD74HC151M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HC151M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HC151M?
CD74HC151M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HC151M 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 CD74HC151M?
For technical support, including CD74HC151M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HC151M requirements.
6.How does Aetrix verify that CD74HC151M is sourced from the original manufacturer or authorized distributors?
All CD74HC151M 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 CD74HC151M meets industry standards.
7.What is the process for return or replacement of CD74HC151M?
All CD74HC151M units undergo pre-shipment inspection (PSI). If there is an issue with CD74HC151M, 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 CD74HC151M part is unused and in its original packaging.
Return procedure for CD74HC151M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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