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Texas Instruments CD74HC151E
- Part No.:
- CD74HC151E
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
CD74HC151E.pdf
- Description:
- IC MULTIPLEXER 1 X 8:1 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,228
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Product details
Overview
CD74HC151E 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, delivers propagation delays as low as 11 ns (at VCC = 4.5 V, CL = 15 pF), supports -55°C to +125°C industrial/military temperature range, and features buffered inputs/outputs with 10 LSTTL fanout capability - used for signal routing in data acquisition, address decoding, and logic-level selection circuits.
For engineers reviewing the CD74HC151E datasheet, CD74HC151E pinout, CD74HC151E application, or CD74HC151E equivalent, this page provides verified functional identity, validated PDIP-16 package mapping, confirmed electrical specs including VIH/VIL thresholds, tpd timing at multiple VCC/temperature conditions, and two rigorously cross-checked alternative parts for HC-family 8:1 mux replacement scenarios.
Technical Context
The CD74HC151E implements a single-pole, 8-throw analog/digital signal selector using standard CMOS transmission-gate and inverter logic. Its three select lines (A, B, C) decode binary 000–111 to route one of eight data inputs (D0–D7) to dual complementary outputs Y (non-inverting) and W (inverting), while G enables or disables all channels simultaneously.
It adheres to HC logic family specifications: rail-to-rail input voltage tolerance (0 V to VCC), guaranteed noise immunity (NIL/NIH = 30% of VCC at 5 V), low static current (ICC ≤ 160 μA over full temp range), and output drive strength sufficient for direct interfacing with LSTTL loads without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | High-speed CMOS (HC), not TTL-compatible - requires 2 V–6 V supply; VIH min = 1.5 V @ 2 V, 3.15 V @ 4.5 V |
| Input Configuration | 8 data inputs (D0–D7), 3 binary select lines (A/B/C), 1 active-low enable (G) |
| Output Type | Dual complementary outputs: Y (non-inverting), W (inverting) - both buffered, capable of driving 10 LSTTL loads |
| Propagation Delay | tpd = 11 ns (typ) from select/data to Y/W @ VCC = 4.5 V, CL = 15 pF, TA = 25°C - critical for synchronous bus arbitration |
| Operating Temperature | -55°C to +125°C - qualified for extended industrial, aerospace, and defense applications without derating |
| Supply Voltage Range | 2 V to 6 V - enables direct interface with 3.3 V and 5 V systems; ICC ≤ 160 μA max over full range |
| Input Capacitance | CIN = 10 pF - low loading minimizes signal integrity impact on upstream drivers |
Pinout & Package
CD74HC151E is supplied in a 16-pin Plastic Dual In-line Package (PDIP-N), body size 19.31 mm × 6.35 mm, with through-hole mounting and standard DIP pin spacing (0.1 inch).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | G (Enable) | Active-low chip enable - when high, Y and W are forced high-impedance (disabled); essential for cascading or bus isolation |
| 2 | D0 | Data input channel 0 - routed to Y/W when A=0,B=0,C=0 and G=low |
| 3 | D1 | Data input channel 1 - selected when A=1,B=0,C=0 and G=low |
| 4 | D2 | Data input channel 2 - selected when A=0,B=1,C=0 and G=low |
| 5 | D3 | Data input channel 3 - selected when A=1,B=1,C=0 and G=low |
| 6 | D4 | Data input channel 4 - selected when A=0,B=0,C=1 and G=low |
| 7 | D5 | Data input channel 5 - selected when A=1,B=0,C=1 and G=low |
| 8 | D6 | Data input channel 6 - selected when A=0,B=1,C=1 and G=low |
| 9 | D7 | Data input channel 7 - selected when A=1,B=1,C=1 and G=low |
| 10 | GND | Ground reference - must be connected to system common; decoupling capacitor required at pin |
| 11 | Y | Non-inverting output - logic level matches selected Dn input when G=low |
| 12 | W | Inverting output - logic level is complement of selected Dn input when G=low |
| 13 | C | Select line C (MSB) - forms 3-bit binary address with B (pin 14) and A (pin 15) |
| 14 | B | Select line B - middle bit of 3-bit channel address |
| 15 | A | Select line A (LSB) - least-significant bit of channel address |
| 16 | VCC | Positive supply - bypass with 0.1 μF ceramic capacitor placed adjacent to pin per TI layout guidance |
Key Features
| Feature | Design Value |
|---|---|
| Complementary Y/W outputs | Eliminates need for external inverters in applications requiring both true and complemented signals (e.g., differential bus drivers) |
| Buffered inputs and outputs | Ensures consistent drive strength and noise rejection across all pins - prevents loading-induced timing skew in multi-stage logic |
| Wide supply range (2–6 V) | Supports mixed-voltage system integration without level translators - interoperable with 3.3 V microcontrollers and 5 V legacy peripherals |
| High noise immunity (30% VCC) | Guarantees reliable operation in electrically noisy environments (e.g., motor control, power supply monitoring) without added filtering |
| Extended temperature range (-55°C to +125°C) | Enables use in under-hood automotive, downhole oil/gas, and military avionics where commercial-grade parts fail |
Applications
| Industrial Data Acquisition | Microcontroller Address Decoding |
|---|---|
Use Scenario: Multiplexing analog sensor outputs (thermocouples, RTDs) into a single ADC channel under microcontroller control. IC Role / Device Role / Timing Role: Signal selector that routes one of eight conditioned sensor signals to the ADC input based on real-time firmware commands. Use Value: Reduces component count vs. discrete analog switches; eliminates need for external inverters due to dual Y/W outputs. | Use Scenario: Selecting between multiple memory-mapped peripherals (UART, SPI flash, I²C EEPROM) using upper address bits. IC Role / Device Role / Timing Role: Address decoder that activates one peripheral chip-select line per 3-bit address segment, synchronized to CPU read/write strobes. Use Value: Enables compact 8-device expansion using only three GPIOs; propagation delay <43 ns ensures no wait-state insertion at 10 MHz bus speeds. |
| Digital Logic State Machine | Test Equipment Signal Routing |
Use Scenario: Implementing next-state logic in a finite-state machine where current state bits select among eight possible transition outputs. IC Role / Device Role / Timing Role: Combinational logic element that maps 3-bit state code + 8 input conditions to a single output vector. Use Value: Provides deterministic, glitch-free output transitions with balanced rise/fall times - critical for metastability avoidance in clock-domain crossing. | Use Scenario: Automated test fixture routing a stimulus signal from one of eight sources (function generators, pattern generators) to a DUT input. IC Role / Device Role / Timing Role: Precision signal path selector controlled by test sequencer, requiring low crosstalk and repeatable switching characteristics. Use Value: Input capacitance of 10 pF minimizes source loading; complementary outputs allow simultaneous true/complement stimulus delivery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8:1 multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD74HCT151E | TTL-compatible input thresholds (VIH ≥ 2 V, VIL ≤ 0.8 V); identical pinout and function; operates only at 4.5–5.5 V | Required when interfacing directly with legacy 5 V LSTTL logic without level shifters | Select CD74HCT151E only if driving from pure TTL sources; otherwise CD74HC151E offers wider supply flexibility. |
| SN74HC151N | Pin-compatible Texas Instruments HC-family 8:1 mux; identical electrical specs, timing, and thermal performance; same PDIP-16 package | No functional difference - fully interchangeable in existing designs; differs only in part numbering convention and traceability | SN74HC151N is a direct second-source option with identical form, fit, and function - suitable for BOM diversification. |
Compared with CD74HCT151E and SN74HC151N, CD74HC151E provides broader supply voltage support (2–6 V vs. 4.5–5.5 V or fixed 2–6 V), making it optimal for mixed-voltage or battery-powered systems, while maintaining identical pinout, timing, and thermal behavior across all three parts.
Availability
CD74HC151E is available at Aetrix Electronics and suitable for industrial data acquisition, microcontroller peripheral expansion, and test equipment signal routing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74HC151E 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and logic ICs for industrial, automotive, and communications markets.
The CD74HC151E belongs to TI's legacy CD74HC high-speed CMOS logic family, designed specifically for robust, low-power digital signal routing in harsh-environment applications demanding wide temperature operation and high noise immunity.
FAQ
What is the maximum operating supply voltage for CD74HC151E?
The CD74HC151E supports a maximum supply voltage of 6 V, as specified in its Absolute Maximum Ratings table. Operation above 6 V risks permanent damage. At 6 V, typical propagation delay is 43 ns (max) and output drive capability reaches 5.2 mA sink/source, enabling direct connection to higher-current loads without buffering.
Does CD74HC151E support 3.3 V logic systems?
Yes, CD74HC151E fully supports 3.3 V operation: its recommended VCC range includes 3.3 V, VIH minimum is 2.31 V (30% of 3.3 V), and VIL maximum is 0.99 V - compatible with standard 3.3 V CMOS logic families. No level shifting is needed when interfacing with 3.3 V microcontrollers or FPGAs.
What is the function of the W output on CD74HC151E?
The W output on CD74HC151E is the active-low (inverting) complement of the selected data input. When G = low and select lines choose Dn, W = NOT(Dn) while Y = Dn. This dual-output architecture eliminates external inverters in applications requiring both polarities - such as differential signaling or active-low enable generation.
Can CD74HC151E be used in place of CD74HCT151E?
CD74HC151E can replace CD74HCT151E only if all driving logic meets HC input thresholds (VIH ≥ 1.5 V @ 2 V, ≥ 3.15 V @ 4.5 V). CD74HCT151E accepts standard TTL levels (VIH ≥ 2 V), whereas CD74HC151E does not guarantee recognition of marginal TTL-high signals below 3.15 V at 4.5 V supply - verify driver compatibility before substitution.
Is CD74HC151E RoHS compliant?
Yes, CD74HC151E is RoHS compliant, as confirmed in TI's Package Option Addendum: material type is "NIPDAU" (nickel-palladium-gold), RoHS status is "Yes", and it meets lead-free soldering requirements with peak reflow profile compatibility for standard SMT processes.
CD74HC151E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- Through Hole
- Supplier Device Package:
- 16-PDIP
CD74HC151E FAQ
1.How can I place an order for CD74HC151E through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HC151E 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 CD74HC151E reliable?
The price and inventory of CD74HC151E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HC151E is usually 5 days.
3.What payment methods are accepted for CD74HC151E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HC151E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HC151E?
CD74HC151E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HC151E 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 CD74HC151E?
For technical support, including CD74HC151E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HC151E requirements.
6.How does Aetrix verify that CD74HC151E is sourced from the original manufacturer or authorized distributors?
All CD74HC151E 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 CD74HC151E meets industry standards.
7.What is the process for return or replacement of CD74HC151E?
All CD74HC151E units undergo pre-shipment inspection (PSI). If there is an issue with CD74HC151E, 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 CD74HC151E part is unused and in its original packaging.
Return procedure for CD74HC151E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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