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Texas Instruments CD74HC253E
- Part No.:
- CD74HC253E
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
CD74HC253E.pdf
- Description:
- IC MULTIPLEXER 2 X 4:1 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:620
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Product details
Overview
CD74HC253E from Texas Instruments is a dual 4-to-1 line selector/multiplexer with three-state outputs, designed for digital signal routing in logic systems. It features common S0/S1 select inputs, independent 1OE/2OE output-enable controls, 2V–6V operation, -55°C to +125°C temperature range, and TTL-compatible fanout of 10 LSTTL loads.
For engineers reviewing the CD74HC253E datasheet, CD74HC253E pinout, CD74HC253E application, or CD74HC253E equivalent, this device supports high-reliability multiplexing in industrial control, test equipment, and data acquisition where wide supply voltage tolerance and robust three-state bus interfacing are required.
Technical Context
The CD74HC253E implements two independent 4-input multiplexers sharing S0 and S1 select lines, enabling simultaneous selection of one of four data sources per section. Each output (1Y, 2Y) enters high-impedance state when its respective OE input is HIGH, allowing direct connection to shared buses without external isolation.
It uses high-speed CMOS (HC) logic with balanced propagation delay (30–53 ns at VCC = 6V/4.5V, CL = 50 pF), low quiescent current (≤160 µA over full temperature range), and high noise immunity (NIL/NIH = 30% of VCC at 5V), making it suitable for mixed-signal environments with switching noise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | High-Speed CMOS (HC), not TTL-compatible at 2V–3.3V but fully functional across 2V–6V supply |
| Supply Voltage Range | 2V to 6V - enables interoperability with 3.3V and 5V systems without level shifters |
| Operating Temperature | -55°C to +125°C - qualified for aerospace, automotive under-hood, and industrial embedded use |
| Propagation Delay | 30 ns max (VCC = 6V, CL = 50 pF) - supports >10 MHz multiplexed data rates in synchronous logic |
| Output Drive | ±25 mA per output - sufficient to drive 10 LSTTL loads or moderate PCB trace capacitance |
| Three-State Leakage | ±10 µA max (VCC = 5.5V, -55°C to +125°C) - ensures bus integrity during disable with minimal standby current |
| Input Capacitance | 10 pF - limits loading on upstream drivers and preserves signal edge integrity |
Pinout & Package
CD74HC253E is housed in a 16-lead plastic dual in-line package (PDIP) with 0.3-inch body width and through-hole mounting. Pin spacing is 0.1 inch, compatible with standard 0.1" pitch protoboards and wave-solder fixtures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15 | Output Enable (1OE, 2OE) | Active-LOW enables corresponding Y output; HIGH forces high-impedance state for bus sharing |
| 2, 14 | Data Inputs (1I0–1I3, 2I0–2I3) | Four parallel data sources per multiplexer section; inputs tolerate 0V to VCC |
| 3, 4, 12, 13 | Select Inputs (S0, S1) | Common binary address lines selecting one of four inputs per section (00–11) |
| 5, 11 | Outputs (1Y, 2Y) | Three-state buffered outputs; sink/source ±25 mA, support bus-oriented architectures |
| 7 | GND | Ground reference for all logic and I/O; must be low-inductance connection for noise immunity |
| 16 | VCC | Positive supply (2V–6V); decoupling capacitor (0.1 µF ceramic) required adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4:1 multiplexers | Reduces component count vs. discrete mux ICs; enables parallel channel selection in data concentrators |
| Common S0/S1 select lines | Simplifies control logic and timing-only two address lines needed for both sections |
| Separate 1OE/2OE inputs | Allows selective enable/disable of each output independently, supporting time-multiplexed bus arbitration |
| Three-state outputs with low leakage | Enables safe wired-OR or shared-bus topologies without contention or shoot-through current |
| Wide 2V–6V supply range | Eliminates need for separate voltage regulators in mixed-voltage systems (e.g., 3.3V logic + 5V peripherals) |
Applications
| Industrial PLC I/O Expansion | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Multiplexing analog sensor readings or digital status signals from multiple field devices into a single ADC or microcontroller input port. IC Role / Device Role / Timing Role: Signal routing switch that selects one of four input channels per section under microcontroller GPIO control. Use Value: Reduces microcontroller pin count and simplifies firmware by consolidating up to eight discrete inputs into two controlled paths. | Use Scenario: Routing stimulus signals or measurement returns between DUT interface connectors and instrument resources in modular ATE racks. IC Role / Device Role / Timing Role: High-reliability digital path selector enabling flexible test sequence configuration without relay wear or latency. Use Value: Supports sub-50 ns propagation delay and stable operation across temperature extremes encountered in production burn-in chambers. |
| Data Acquisition Front-End | Legacy System Bus Interface |
Use Scenario: Selecting among multiple transducer outputs (e.g., thermocouples, strain gauges) prior to amplification and digitization in environmental monitoring hardware. IC Role / Device Role / Timing Role: Low-noise, high-impedance input selector minimizing signal degradation before conditioning stages. Use Value: Input leakage ≤1 µA and 10 pF capacitance preserve signal integrity for high-impedance sensors. | Use Scenario: Interfacing modern microcontrollers to legacy parallel buses (e.g., ISA, GPIB auxiliary lines) requiring dynamic signal gating and direction control. IC Role / Device Role / Timing Role: Three-state bus buffer enabling bidirectional data flow control and conflict-free bus arbitration. Use Value: ±25 mA drive strength and 10 LSTTL fanout ensure compatibility with aging TTL-based backplanes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 4:1 multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC153N | Same pinout, identical function, TI HC-family; slightly higher ICC (max 160 µA vs. CD74HC253E's 160 µA), identical timing specs | No functional difference; SN74HC153N is newer TI branding but electrically equivalent per datasheet revision history | Select SN74HC153N for new designs where TI's current production roadmap and longer-term availability are prioritized. |
| MC74HC153ANG | Onsemi part; same 16-pin PDIP, identical truth table and DC specs; propagation delay 33 ns (typ) at 4.5V vs. CD74HC253E's 35 ns (max) | Valid for drop-in replacement in existing CD74HC253E layouts; qualified to same -55°C to +125°C range | Choose MC74HC153ANG when dual-sourcing or qualifying alternate suppliers for long-lifecycle industrial programs. |
Compared with CD74HC253E, SN74HC153N offers identical functionality and footprint with updated TI manufacturing support, while MC74HC153ANG provides a second-source option with marginally faster typical propagation delay and full temperature-range qualification-both avoid redesign but differ in supply chain positioning and long-term roadmap alignment.
Availability
CD74HC253E is available at Aetrix Electronics and suitable for industrial control, automated test equipment, and data acquisition systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for CD74HC253E 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 solutions for industrial, automotive, and communications markets.
The CD74HC253E belongs to TI's legacy high-speed CMOS logic family, engineered for robust digital signal routing in harsh environments where wide voltage operation, thermal stability, and bus-sharing capability are critical.
FAQ
What is the maximum operating supply voltage for CD74HC253E?
The CD74HC253E supports a maximum DC supply voltage of 6V, with absolute maximum rating at 7V. Operation above 6V violates recommended conditions and risks parametric shift or reliability degradation. The device is specified for reliable performance from 2V to 6V across its full -55°C to +125°C temperature range, making it suitable for battery-backed or multi-rail systems where supply may vary.
Does CD74HC253E support 3.3V logic systems?
Yes, CD74HC253E operates fully within 3.3V ±10% (2.97V–3.63V), meeting all AC and DC specifications including VIH ≥1.89V and VIL ≤0.99V at VCC = 3.3V. Its HC logic family ensures compatibility with 3.3V microcontrollers and FPGAs without level translation, and its 10 pF input capacitance minimizes loading on low-drive-strength I/O pins.
How does the three-state output behavior work on CD74HC253E?
Each output (1Y and 2Y) of CD74HC253E enters high-impedance state when its corresponding output-enable input (1OE or 2OE) is driven HIGH. When OE is LOW, the selected input (per S0/S1) appears at Y with standard CMOS drive strength. This allows multiple CD74HC253E devices or other three-state drivers to share a common bus without contention, provided only one device has OE asserted at any time.
What is the propagation delay from S0/S1 to Y on CD74HC253E?
The propagation delay from select inputs S0 or S1 to output Y on CD74HC253E is 30 ns maximum at VCC = 6V and CL = 50 pF, and 44 ns maximum at VCC = 4.5V under the same load. This delay is consistent across both sections and enables deterministic timing in synchronous multiplexing applications such as digital waveform generation or channel-switched ADC sampling control.
Is CD74HC253E RoHS compliant and lead-free?
Yes, CD74HC253E is RoHS compliant and lead-free, as confirmed by Texas Instruments' packaging addendum: "Green (RoHS & no Sb/Br)" with "NIPDAU" (nickel-palladium-gold) lead finish. It meets EU RoHS Directive 2011/65/EU requirements for all 10 restricted substances, with homogeneous material concentrations below 0.1% by weight, and is suitable for lead-free reflow soldering processes.
CD74HC253E 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:
- 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:
- Through Hole
- Supplier Device Package:
- 16-PDIP
CD74HC253E FAQ
1.How can I place an order for CD74HC253E through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HC253E 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 CD74HC253E reliable?
The price and inventory of CD74HC253E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HC253E is usually 5 days.
3.What payment methods are accepted for CD74HC253E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HC253E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HC253E?
CD74HC253E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HC253E 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 CD74HC253E?
For technical support, including CD74HC253E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HC253E requirements.
6.How does Aetrix verify that CD74HC253E is sourced from the original manufacturer or authorized distributors?
All CD74HC253E 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 CD74HC253E meets industry standards.
7.What is the process for return or replacement of CD74HC253E?
All CD74HC253E units undergo pre-shipment inspection (PSI). If there is an issue with CD74HC253E, 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 CD74HC253E part is unused and in its original packaging.
Return procedure for CD74HC253E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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