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Texas Instruments CD74HC253M
- Part No.:
- CD74HC253M
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD74HC253M.pdf
- Description:
- IC MULTIPLEXER 2 X 4:1 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:575
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Product details
Overview
CD74HC253M from Texas Instruments is a dual 4-to-1 line selector/multiplexer with three-state outputs, designed for digital signal routing in bus-oriented systems. It features common S0/S1 select inputs, independent 1OE/2OE enable controls, operates from 2V to 6V, supports -55°C to +125°C industrial temperature range, and delivers 30ns typical propagation delay at 4.5V with 50pF load.
For engineers reviewing the CD74HC253M datasheet, CD74HC253M pinout, CD74HC253M application, or CD74HC253M equivalent, this device is selected for high-reliability multiplexing in aerospace data acquisition, test equipment channel switching, and industrial PLC I/O expansion where wide VCC tolerance and robust three-state bus driving are required.
Technical Context
The CD74HC253M implements two independent 4-input multiplexers sharing S0 and S1 select lines, each with dedicated output-enable (1OE, 2OE) controlling high-impedance state entry. Its HC logic family ensures CMOS-level input thresholds and rail-to-rail output swing across 2–6V supply.
Propagation delay is balanced between select-to-output (35ns typ @4.5V) and data-to-output paths, while disable/enable timing (30ns/22ns typ @4.5V) enables precise bus arbitration. Input leakage remains ≤±1µA over full temperature range, supporting low-power standby operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | High-speed CMOS (HC), compatible with 2V–6V supply rails |
| Function | Dual 4-to-1 multiplexer with three-state outputs and common S0/S1 selects |
| Propagation Delay | 35ns typical (S0/S1 or data → Y, CL = 50pF, VCC = 4.5V) |
| Operating Temperature | -55°C to +125°C - suitable for extended-environment industrial and aerospace use |
| Output Drive | Three-state CMOS outputs capable of sinking/sourcing ±25mA per pin |
| Input Thresholds | VIH = 1.5V min (2V VCC), 3.15V min (4.5V), 4.2V min (6V); VIL = 0.5V max (2V), 1.35V max (4.5V) |
| Power Consumption | ICC ≤ 160µA max over full temp range; CPD = 46pF for dynamic power calculation |
Pinout & Package
CD74HC253M is supplied in a 16-lead SOIC (Small Outline Integrated Circuit) package with 1.27mm lead pitch, JEDEC MS-012 compliant, moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15 | 1OE, 2OE | Active-HIGH output enable for section 1 and section 2; HIGH forces Y outputs into high-impedance state |
| 2, 14 | S1, S0 | Common binary select inputs: S1S0 = 00→1I0/2I0, 01→1I1/2I1, 10→1I2/2I2, 11→1I3/2I3 |
| 3–6, 10–13 | 1I0–1I3, 2I0–2I3 | Data inputs for multiplexer sections 1 and 2; TTL- and CMOS-compatible voltage levels |
| 7 | GND | Ground reference for all internal logic and output drivers |
| 8, 16 | 1Y, 2Y | Three-state outputs; driven only when respective OE is LOW and S0/S1 select active input |
| 9 | VCC | Positive supply rail (2V–6V); powers internal logic and output buffers |
Key Features
| Feature | Design Value |
|---|---|
| Common Select Architecture | Shared S0/S1 pins reduce control-line count and simplify PCB routing for dual-channel selection |
| Independent Output Enables | 1OE and 2OE allow asynchronous gating of each multiplexer output-critical for time-multiplexed bus arbitration |
| Three-State Outputs | Enable direct connection to shared data buses without external isolation; eliminates need for additional bus transceivers |
| Wide Supply Range | 2V–6V operation supports mixed-voltage system integration (e.g., 3.3V logic interfacing with 5V legacy peripherals) |
| High Noise Immunity | NIL/NIH = 30% of VCC at 5V ensures reliable operation in electrically noisy industrial environments |
Applications
| Test Equipment Channel Selection | Aerospace Data Acquisition |
|---|---|
|
Use Scenario: Automated test systems switch between multiple sensor inputs or DUT signals using a single ADC or logic analyzer channel. IC Role / Device Role: Dual 4-to-1 multiplexer routes up to eight analog or digital signals to two shared measurement paths. Use Value: Reduces component count versus discrete mux solutions; three-state outputs prevent signal contention during channel changes. |
Use Scenario: Flight data recorders collect telemetry from redundant sensor sets across avionics bays under extreme thermal conditions. IC Role / Device Role: Signal selector consolidates sensor outputs before digitization, operating reliably from -55°C to +125°C. Use Value: Extended temperature rating and low ICC ensure uninterrupted operation in unheated compartments without derating. |
| Industrial PLC I/O Expansion | Medical Instrument Multiplexing |
|
Use Scenario: Programmable logic controllers add modular analog/digital input cards requiring flexible signal routing to central processing units. IC Role / Device Role: Bus-compatible multiplexer interfaces field sensors to backplane data lanes with controlled enable timing. Use Value: Independent OE pins allow synchronized release of multiple mux outputs onto shared bus, avoiding glitches. |
Use Scenario: Portable diagnostic devices sample ECG, SpO₂, and temperature channels sequentially using one precision ADC. IC Role / Device Role: Low-leakage (<±1µA), rail-to-rail multiplexer preserves signal integrity for high-impedance biopotential sources. Use Value: CMOS input structure minimizes loading on sensitive front-end amplifiers; 46pF CPD limits dynamic power in battery-powered units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 4-to-1 multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC153DR | Same pinout, identical function, TI-manufactured HC variant; slightly higher ICC (200µA max) and lower noise immunity (20% of VCC) | Valid for commercial-temp designs (–40°C to +85°C); not rated for –55°C operation | Select SN74HC153DR only if operating temperature stays above –40°C and layout reuse is critical. |
| MC74HC253ADR2G | Onsemi part with identical logic function and pinout; wider VCC range (2V–6.5V); higher max output current (±35mA vs ±25mA) | Better suited for driving heavier capacitive loads or longer traces; same –55°C to +125°C rating | Choose MC74HC253ADR2G when driving >50pF loads or requiring margin on output drive capability. |
Compared with CD74HC253M, SN74HC153DR trades extended temperature support for broader commercial availability, while MC74HC253ADR2G offers enhanced drive strength and voltage margin without altering footprint or logic behavior.
Availability
CD74HC253M is available at Aetrix Electronics and suitable for aerospace data acquisition, industrial PLC I/O expansion, and portable medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74HC253M 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, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The CD74HC253M belongs to TI's High-Speed CMOS Logic (74HC) product line, engineered for low-power, wide-supply digital signal routing in harsh-environment applications demanding reliability beyond commercial-grade specifications.
FAQ
What is the maximum supply voltage for CD74HC253M?
The absolute maximum DC supply voltage for CD74HC253M is 7V, but the recommended operating range is 2V to 6V per the datasheet. Operation at 6V yields optimal speed (30ns propagation delay) and noise immunity, while maintaining compatibility with both 3.3V and 5V system rails. Exceeding 6V risks accelerated aging and violates the specified functional range.
Does CD74HC253M support true three-state outputs?
Yes, CD74HC253M provides true three-state outputs on pins 1Y and 2Y. When either 1OE or 2OE is driven HIGH, the corresponding output enters high-impedance mode with leakage current ≤±10µA over full temperature range. This allows safe connection to shared buses without external pull-ups or contention protection circuitry.
Can CD74HC253M operate at -55°C?
Yes, CD74HC253M is fully specified and tested for operation from -55°C to +125°C. All key parameters-including propagation delay, output drive, and input thresholds-are guaranteed across this extended industrial temperature range, making it suitable for aerospace, downhole, and military applications where ambient extremes occur.
What is the input capacitance of CD74HC253M?
The input capacitance (CI) of CD74HC253M is 10pF maximum per input pin, consistent across all operating conditions and temperatures. This low value minimizes loading on upstream drivers and supports clean signal integrity in high-speed digital routing, especially important when cascading multiple logic stages or driving long PCB traces.
Is CD74HC253M pin-compatible with CD74HCT253M?
Yes, CD74HC253M and CD74HCT253M share identical pinout, package (16-pin SOIC), and functional block diagram. However, they differ in input threshold compatibility: CD74HC253M uses CMOS thresholds (VIH = 3.15V min @4.5V), while CD74HCT253M matches LSTTL inputs (VIH = 2V min). Swapping requires verifying upstream driver compatibility.
CD74HC253M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Multiplexer
- Circuit:
- 2 x 4:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- 7.8mA, 7.8mA
- 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
CD74HC253M FAQ
1.How can I place an order for CD74HC253M through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HC253M 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 CD74HC253M reliable?
The price and inventory of CD74HC253M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HC253M is usually 5 days.
3.What payment methods are accepted for CD74HC253M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HC253M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HC253M?
CD74HC253M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HC253M 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 CD74HC253M?
For technical support, including CD74HC253M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HC253M requirements.
6.How does Aetrix verify that CD74HC253M is sourced from the original manufacturer or authorized distributors?
All CD74HC253M 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 CD74HC253M meets industry standards.
7.What is the process for return or replacement of CD74HC253M?
All CD74HC253M units undergo pre-shipment inspection (PSI). If there is an issue with CD74HC253M, 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 CD74HC253M part is unused and in its original packaging.
Return procedure for CD74HC253M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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