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Texas Instruments SN74HC253QDREP
- Part No.:
- SN74HC253QDREP
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74HC253QDREP.pdf
- Description:
- IC MULTIPLEXER 2 X 4:1 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,716
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Product details
Overview
SN74HC253QDREP from Texas Instruments is a dual 4-line to 1-line data selector/multiplexer with independent 3-state outputs, operating across 2 V to 6 V supply, supporting −40°C to 125°C extended temperature range, featuring 9 ns typical propagation delay at 5 V and ±6-mA output drive capability - used in bus-organized digital systems for signal routing and parallel-to-serial conversion.
For engineers reviewing the SN74HC253QDREP datasheet, SN74HC253QDREP pinout, SN74HC253QDREP application, or SN74HC253QDREP equivalent, this page delivers verified functional identity, validated SOIC-16 pin mapping, confirmed electrical specs (VCC range, tpd, IOH/IOL), thermal and reliability pedigree (enhanced DMS, HAST-tested), and real-world multiplexing use cases in industrial control and automotive subsystems.
Technical Context
The SN74HC253QDREP implements two independent 4:1 multiplexer sections sharing common select inputs A and B, each with dedicated active-low output-enable (1OE, 2OE) controlling high-impedance 3-state outputs (1Y, 2Y). Each section decodes binary-select lines to route one of four CMOS-compatible data inputs (C0–C3) to its output.
It uses standard HC logic architecture with buffered inverters and AND-OR gating, delivering rail-to-rail output swing, low input current (≤1 µA), and low power consumption (ICC ≤ 160 µA at 6 V). The device supports bus interfacing via independent output enables and meets JEDEC JESD22-A108 qualified reliability standards for extended temperature operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 6 V - enables direct interface with 3.3 V and 5 V logic domains without level shifters. |
| tpd (Typical) | 9 ns at VCC = 5 V, CL = 50 pF - ensures timing compatibility with medium-speed synchronous digital systems. |
| Output Drive | ±6 mA at VCC = 5 V - sufficient to drive 15 LSTTL loads, supporting legacy TTL bus loading requirements. |
| ICC (Max) | 160 µA at VCC = 6 V - enables low-static-power operation in battery-backed or energy-constrained embedded modules. |
| Operating Temp | −40°C to 125°C - qualified per JEDEC JESD22-A108 (HAST, temp cycle, bond intermetallic life) for under-hood automotive and industrial control environments. |
| Input Leakage | ±1 µA max - prevents unintended logic state drift on floating or high-impedance control lines. |
| 3-State Enable | Separate active-low OE per section (1OE, 2OE) - allows independent bus arbitration and dynamic channel isolation without external gating. |
Pinout & Package
SN74HC253QDREP is housed in a 16-pin SOIC (D) package with 1.27 mm pitch, JEDEC MS-012AC compliant, moisture sensitivity level 1 (260°C peak reflow), and RoHS-compliant NiPdAu lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1OE | Active-low output enable for first multiplexer section - drives 1Y to high-Z when high. |
| 2 | B | Common binary select bit (MSB) shared by both sections - determines C2/C3 vs C0/C1 group selection. |
| 3 | 1C3 | Data input 3 for first section - routed to 1Y when A=1, B=1. |
| 4 | 1C2 | Data input 2 for first section - routed to 1Y when A=0, B=1. |
| 5 | 1C1 | Data input 1 for first section - routed to 1Y when A=1, B=0. |
| 6 | 1C0 | Data input 0 for first section - routed to 1Y when A=0, B=0. |
| 7 | 1Y | Inverting 3-state output of first section - active low-true output with full rail swing. |
| 8 | GND | Ground reference for all internal logic and I/O - must be connected to system ground plane. |
| 9 | VCC | Positive supply rail - accepts 2 V to 6 V; bypass capacitor recommended near pin. |
| 10 | 2OE | Active-low output enable for second multiplexer section - controls high-Z state of 2Y independently. |
| 11 | A | Common binary select bit (LSB) shared by both sections - pairs with B to select C0–C3. |
| 12 | 2C3 | Data input 3 for second section - routed to 2Y when A=1, B=1. |
| 13 | 2C2 | Data input 2 for second section - routed to 2Y when A=0, B=1. |
| 14 | 2C1 | Data input 1 for second section - routed to 2Y when A=1, B=0. |
| 15 | 2C0 | Data input 0 for second section - routed to 2Y when A=0, B=0. |
| 16 | 2Y | Inverting 3-state output of second section - electrically isolated from 1Y; supports independent bus driving. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4:1 multiplexers | Enables simultaneous routing of two separate 4-input data streams using shared select lines - reduces control logic overhead in multi-channel monitoring systems. |
| Individual 3-state output enables | Allows time-multiplexed bus sharing between 1Y and 2Y without contention - eliminates need for external bus buffers or arbitration logic. |
| Extended temperature qualification | Validated per JEDEC JESD22-A108 (HAST, temperature cycling, electromigration) - supports deployment in engine control units and industrial PLCs without derating. |
| Low ICC and high noise immunity | 160 µA max supply current and 1.5 V min VIH at 2 V VCC - ensures stable operation in low-power sensor nodes with noisy supply rails. |
| CMOS input compatibility | ≤1 µA input leakage and rail-referenced VIH/VIL thresholds - eliminates need for pull-up/pull-down resistors on select and enable lines in microcontroller-driven designs. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Multiplexing |
|---|---|
|
Use Scenario: Routing analog sensor signals (MAP, TPS, O2) through a single ADC channel using digital select lines from MCU. IC Role / Device Role / Timing Role: Dual 4:1 multiplexer providing time-sliced analog front-end selection with independent channel enable for fault-isolation. Use Value: Reduces component count by replacing two discrete mux ICs; 125°C rating ensures uninterrupted operation near engine bay heat sources. |
Use Scenario: Consolidating status inputs from 8 discrete field devices onto a shared backplane data bus in modular I/O racks. IC Role / Device Role / Timing Role: Bus-interface multiplexer with per-section 3-state control enabling dynamic channel assignment without bus contention. Use Value: Eliminates need for external bus transceivers; ±6-mA drive sustains signal integrity across 20 cm PCB traces at 1 MHz update rates. |
| Avionics Sensor Data Aggregation | Test Equipment Signal Routing |
|
Use Scenario: Selecting among four redundant air data computer outputs for primary flight display based on health monitoring flags. IC Role / Device Role / Timing Role: Fault-tolerant data selector with independent OE pins allowing hot-swappable channel disable during diagnostics. Use Value: −40°C to 125°C qualification and enhanced DMS support ensure long-term supply continuity for certified avionics hardware lifecycles. |
Use Scenario: Configuring stimulus/response paths between arbitrary instrument channels (DMM, SMU, scope) in automated test fixtures. IC Role / Device Role / Timing Role: Reconfigurable signal router with sub-10 ns propagation delay enabling precise timing alignment across measurement channels. Use Value: 9 ns tpd and 50 pF load compatibility allow synchronization of multi-instrument triggers within <15 ns jitter budget. |
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 |
|---|---|---|---|
| SN74HC153DR | Non-3-state outputs; single OE for both sections; no independent output disables. | Lacks per-section bus arbitration - requires external tri-state buffers for shared-bus use. | Select when cost sensitivity outweighs bus-driving flexibility and temperature range is limited to 0°C–70°C. |
| SN74LVC253APWR | 3.3 V only (1.65–3.6 V); higher speed (tpd = 5.1 ns typ); lower drive (±24 mA). | Not suitable for 5 V systems or mixed-voltage buses; optimized for low-voltage portable instrumentation. | Prefer for new 3.3 V designs requiring faster switching and smaller footprint (TSSOP-16), but verify VCC compatibility. |
Compared with SN74HC253QDREP, SN74HC153DR lacks independent 3-state control and extended temperature support, limiting bus use and harsh-environment deployment; SN74LVC253APWR offers speed and density gains but sacrifices voltage flexibility and industrial temperature coverage.
Availability
SN74HC253QDREP is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O modules, avionics sensor aggregation, and automated test equipment requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for SN74HC253QDREP 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 solutions, with over 50 years of innovation in high-reliability interface and control ICs.
The SN74HC253QDREP belongs to TI's enhanced-product (EP) logic family, designed specifically for mission-critical industrial, automotive, and defense applications demanding extended temperature operation, controlled baseline manufacturing, and long-term DMS support.
FAQ
What is the function of SN74HC253QDREP in a digital system?
The SN74HC253QDREP functions as a dual 4-line to 1-line data selector/multiplexer with independent 3-state outputs. It routes one of four input signals per section (C0–C3) to its respective output (1Y or 2Y) based on binary select lines A and B. Its separate OE pins (1OE, 2OE) allow independent bus arbitration, making SN74HC253QDREP ideal for time-multiplexed signal routing in industrial and automotive control systems where channel isolation and bus compatibility are critical.
Does SN74HC253QDREP support 5 V logic systems?
Yes, SN74HC253QDREP fully supports 5 V logic systems. Its specified VCC range is 2 V to 6 V, and key parameters - including ±6-mA output drive, 9 ns typical propagation delay, and VIH/VIL thresholds - are guaranteed at VCC = 5 V. The device maintains rail-to-rail output swing and interfaces directly with standard TTL and CMOS loads without level-shifting circuitry, confirming SN74HC253QDREP as a drop-in solution for legacy 5 V digital designs.
What is the significance of the "Q" and "REP" suffixes in SN74HC253QDREP?
The "Q" denotes TI's enhanced-product (EP) qualification level, indicating extended temperature operation (−40°C to 125°C), controlled baseline manufacturing, and qualification per JEDEC JESD22-A108 reliability standards (HAST, temperature cycling, electromigration). The "REP" suffix signifies tape-and-reel packaging (2500 units per reel) with RoHS-compliant NiPdAu lead finish and moisture sensitivity level 1. Together, these suffixes confirm SN74HC253QDREP as a high-reliability, production-ready component for long-lifecycle industrial and automotive applications.
Can SN74HC253QDREP replace SN74HC153 in existing designs?
SN74HC253QDREP can replace SN74HC153 in most functional contexts but requires layout review due to key differences: SN74HC253QDREP provides independent 3-state outputs (1Y/2Y) with separate OE pins, whereas SN74HC153 has non-3-state outputs and a single OE. If the original design relies on shared bus driving or hot-swappable channel disable, SN74HC253QDREP adds value; however, pin compatibility is maintained (both are SOIC-16), so no PCB changes are required beyond verifying OE logic polarity and bus termination.
What thermal and reliability testing applies to SN74HC253QDREP?
SN74HC253QDREP undergoes JEDEC JESD22-A108 qualification, including Highly Accelerated Stress Test (HAST) or biased 85/85, temperature cycling, autoclave or unbiased HAST, electromigration, bond intermetallic life, and mold compound life testing. These tests validate reliable operation across −40°C to 125°C and support long-term deployment in under-hood automotive and industrial environments. The device's θJA of 73°C/W further confirms thermal performance suitability for convection-cooled PCB layouts, reinforcing SN74HC253QDREP's role in thermally demanding applications.
SN74HC253QDREP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SN74HC253QDREP FAQ
1.How can I place an order for SN74HC253QDREP through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC253QDREP 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 SN74HC253QDREP reliable?
The price and inventory of SN74HC253QDREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC253QDREP is usually 5 days.
3.What payment methods are accepted for SN74HC253QDREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC253QDREP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HC253QDREP?
SN74HC253QDREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC253QDREP 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 SN74HC253QDREP?
For technical support, including SN74HC253QDREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC253QDREP requirements.
6.How does Aetrix verify that SN74HC253QDREP is sourced from the original manufacturer or authorized distributors?
All SN74HC253QDREP 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 SN74HC253QDREP meets industry standards.
7.What is the process for return or replacement of SN74HC253QDREP?
All SN74HC253QDREP units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC253QDREP, 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 SN74HC253QDREP part is unused and in its original packaging.
Return procedure for SN74HC253QDREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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