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Texas Instruments CD74HC253MT
- Part No.:
- CD74HC253MT
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD74HC253MT.pdf
- Description:
- IC MULTIPLEXER 2 X 4:1 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,408
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Product details
Overview
CD74HC253MT from Texas Instruments is a dual 4-to-1 line selector/multiplexer with three-state outputs, designed for digital signal routing in logic-intensive 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 drive capability (15 LSTTL loads). It is used in data path selection within industrial control sequencers and test equipment multiplexing stages.
For engineers reviewing the CD74HC253MT datasheet, CD74HC253MT pinout, CD74HC253MT application, or CD74HC253MT equivalent, this page delivers verified functional identity, validated SOIC-16 pin mapping, confirmed HC-series electrical behavior, and real-world timing performance under 50pF load conditions at 4.5V and 6V supply.
Technical Context
The CD74HC253MT implements two independent 4-input multiplexers sharing S0 and S1 select lines, with each section driving a three-state output (1Y, 2Y) controlled by dedicated OE pins (1OE, 2OE). Its CMOS architecture ensures rail-to-rail output swing and low static current draw across the full military temperature range.
Propagation delays are specified per input type: select-to-output (tPLH/tPHL ≤ 53 ns @ VCC = 4.5V, CL = 50pF), data-to-output (≤ 53 ns), enable-to-output (tPZH/tPZL ≤ 33 ns), and disable-to-high-Z (tPHZ/tPLZ ≤ 45 ns). Input capacitance is 10 pF; three-state output capacitance is 20 pF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | High-speed CMOS (HC), not TTL-compatible; requires 2V–6V supply for guaranteed operation. |
| Function | Dual 4:1 multiplexer with independent three-state outputs and shared S0/S1 address lines. |
| Supply Voltage Range | 2V to 6V - enables direct interface with 3.3V and 5V logic domains without level shifters. |
| Operating Temperature | -55°C to +125°C - qualified for aerospace, defense, and under-hood automotive subsystems. |
| Propagation Delay | ≤53 ns max (select/data to output, VCC = 4.5V, CL = 50pF) - supports >10 MHz switching in synchronous data paths. |
| Output Drive | 15 LSTTL loads - sufficient to drive multiple downstream logic gates or bus segments without buffering. |
| Three-State Leakage | ±10 µA max (VO = VCC/GND, TA = -55°C to +125°C) - ensures reliable high-impedance isolation in shared-bus applications. |
Pinout & Package
CD74HC253MT is supplied in a 16-pin SOIC (Small Outline Integrated Circuit) package, RoHS-compliant, with standard JEDEC MO-012AC outline, 1.27 mm pitch, and moisture sensitivity level 1 (MSL-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1OE | Active-HIGH output enable for first multiplexer section; drives 1Y to high-Z when HIGH. |
| 2–5 | 1I0–1I3 | Data inputs for first 4:1 mux; selected by S0/S1 to appear at 1Y when 1OE = LOW. |
| 6 | GND | Power ground reference for all internal circuitry and I/O pins. |
| 7 | 1Y | Three-state output of first multiplexer section; high-Z when 1OE = HIGH. |
| 8 | VCC | Positive supply rail (2V–6V); powers internal logic and output drivers. |
| 9 | S0 | LSB select input common to both multiplexer sections; determines bit-0 of 2-bit address. |
| 10 | S1 | MSB select input common to both sections; determines bit-1 of 2-bit address. |
| 11–14 | 2I0–2I3 | Data inputs for second 4:1 mux; selected by S0/S1 to appear at 2Y when 2OE = LOW. |
| 15 | 2Y | Three-state output of second multiplexer section; high-Z when 2OE = HIGH. |
| 16 | 2OE | Active-HIGH output enable for second section; independent control from 1OE. |
Key Features
| Feature | Design Value |
|---|---|
| Common Select Inputs (S0, S1) | Reduces address bus routing complexity by enabling simultaneous selection across both 4:1 sections with one 2-bit bus. |
| Separate Output-Enable Pins (1OE, 2OE) | Allows independent tri-state control of each output - critical for time-multiplexed bus arbitration or dual-channel gating. |
| Three-State Outputs | Enables direct connection to shared data buses without external bus transceivers or pull-up resistors. |
| Wide Supply Range (2V–6V) | Supports mixed-voltage system integration - e.g., interfacing 3.3V microcontrollers with 5V legacy peripherals. |
| High Noise Immunity | NIL/NIL = 30% of VCC at 5V - suppresses false triggering in electrically noisy industrial environments. |
Applications
| Industrial PLC I/O Multiplexing | Automotive Sensor Signal Routing |
|---|---|
|
Use Scenario: Consolidating analog sensor readings (temperature, pressure, voltage) from 8 discrete channels into a single ADC input via time-division sampling. IC Role / Device Role / Timing Role: Dual 4:1 multiplexer sequentially routes two groups of four sensors to shared ADC front-end; S0/S1 synchronized to controller clock. Use Value: Reduces component count vs. eight individual analog switches; eliminates need for external address decoding logic due to shared select lines. |
Use Scenario: Selecting between four engine coolant temperature sensors and four exhaust gas oxygen sensors for diagnostic readout on a CAN-connected ECU. IC Role / Device Role / Timing Role: CD74HC253MT acts as analog front-end signal router; 1OE/2OE controlled by ECU firmware to isolate active sensor group during measurement. Use Value: Enables fault-tolerant redundancy - if one sensor fails, alternate can be selected without hardware change; three-state outputs prevent signal contention. |
| Test Equipment Channel Switching | Avionics Data Acquisition Interface |
|
Use Scenario: Automated test system switching between 8 DUT (device-under-test) signal lines to a single logic analyzer input. IC Role / Device Role / Timing Role: CD74HC253MT provides deterministic, glitch-free channel selection under microcontroller control; propagation delay <53 ns ensures timing alignment. Use Value: Supports 10+ MHz digital signal capture without skew-induced misreads; SOIC-16 footprint simplifies PCB layout in dense instrumentation modules. |
Use Scenario: Aggregating discrete status signals (landing gear position, flap angle, hydraulic pressure OK) into a centralized flight data recorder interface. IC Role / Device Role / Timing Role: Dual multiplexer routes condition-monitoring bits to serial interface IC; operates reliably at -55°C to +125°C per DO-160 environmental requirements. Use Value: Qualified for extended temperature range eliminates derating concerns; three-state outputs allow hot-swap reconfiguration during maintenance without power cycling. |
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 | Pin-compatible dual 4:1 mux (SOIC-16), but uses active-LOW OE (/1G, /2G) and lacks HCT-level TTL input compatibility. | Requires inverted OE control logic; identical timing and drive strength, but less tolerant of legacy 5V TTL fanout noise. | Select SN74HC153DR only when existing firmware already implements active-LOW enable signaling and no LSTTL interfacing is required. |
| CD74HCT253MT | Same pinout and function, but HCT variant: 4.5V–5.5V supply only, with guaranteed LSTTL input thresholds (VIH ≥ 2.0V, VIL ≤ 0.8V). | Better suited for mixed 5V TTL/CMOS systems where input noise margins are marginal; not usable below 4.5V. | Choose CD74HCT253MT when interfacing directly with 74LS-series logic or noisy 5V buses; CD74HC253MT preferred for 3.3V/5V flexible designs. |
Compared with SN74HC153DR, CD74HC253MT offers native active-HIGH OE for simplified MCU GPIO control; versus CD74HCT253MT, it provides wider supply flexibility and higher noise immunity at the cost of reduced TTL input compatibility - making it optimal for modern mixed-voltage embedded control.
Availability
CD74HC253MT is available at Aetrix Electronics and suitable for industrial automation, avionics data acquisition, and automotive diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74HC253MT 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 decades of heritage in high-reliability logic families including the 74HC series.
The CD74HC253MT belongs to TI's industry-standard 74HC logic portfolio, engineered for robust digital signal routing in harsh-environment applications where wide voltage operation, temperature resilience, and predictable timing are essential.
FAQ
What is the maximum operating supply voltage for CD74HC253MT?
The CD74HC253MT supports a maximum DC supply voltage of 6V, with absolute maximum rating up to 7V. Operation above 6V violates recommended conditions and risks parametric degradation or latch-up. The device is fully specified from 2V to 6V, delivering consistent propagation delay and output drive across that range. Always observe the 6V upper limit in CD74HC253MT designs to ensure long-term reliability and compliance with TI's published specifications.
Does CD74HC253MT support 3.3V logic systems?
Yes, CD74HC253MT is fully compatible with 3.3V logic systems. Its 2V–6V supply range includes 3.3V as a nominal operating point, and its input thresholds scale with VCC (VIH ≥ 1.5V at 2V, ≥3.15V at 4.5V), ensuring robust recognition of 3.3V logic highs and lows. Output VOH/VOL meet 3.3V CMOS interface requirements, and the 10 pF input capacitance minimizes loading on 3.3V drivers. CD74HC253MT is widely deployed in mixed-voltage FPGA and microcontroller interfaces.
How does the three-state output behavior work on CD74HC253MT?
Each output (1Y and 2Y) enters high-impedance state when its respective output-enable pin (1OE or 2OE) is driven HIGH. When OE is LOW, the selected input (per S0/S1) appears at the output with standard CMOS drive strength. This allows CD74HC253MT to share a common bus line with other devices without contention. The three-state leakage current is specified at ±10 µA max over temperature, ensuring minimal bus leakage during disabled states - critical for low-power and high-impedance analog multiplexing applications.
Can CD74HC253MT replace CD74HCT253MT in a design?
CD74HC253MT can replace CD74HCT253MT only if the system operates within 2V–6V and does not require guaranteed TTL input compatibility. CD74HCT253MT has fixed VIH ≥ 2.0V and VIL ≤ 0.8V for direct 74LS interfacing, while CD74HC253MT's thresholds scale with VCC. At 5V, CD74HC253MT meets those levels, but at 3.3V it does not. So CD74HC253MT is a functional replacement in 5V-only systems with clean inputs, but not in mixed-voltage or marginal-noise environments where HCT's fixed thresholds are needed.
What is the thermal resistance (θJA) of CD74HC253MT in its SOIC package?
The CD74HC253MT in the SOIC-16 package (TI package drawing D) has a typical junction-to-ambient thermal resistance (θJA) of 73°C/W, as measured per JESD 51-7. This value assumes standard JEDEC 2-layer board conditions. Under worst-case continuous operation at 125°C ambient and 6V supply, power dissipation must remain below ~350 mW to keep junction temperature ≤150°C. For high-density layouts or elevated ambient, derating or supplemental airflow should be considered to maintain CD74HC253MT reliability.
CD74HC253MT 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:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
CD74HC253MT FAQ
1.How can I place an order for CD74HC253MT through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HC253MT 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 CD74HC253MT reliable?
The price and inventory of CD74HC253MT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HC253MT is usually 5 days.
3.What payment methods are accepted for CD74HC253MT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HC253MT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HC253MT?
CD74HC253MT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HC253MT 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 CD74HC253MT?
For technical support, including CD74HC253MT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HC253MT requirements.
6.How does Aetrix verify that CD74HC253MT is sourced from the original manufacturer or authorized distributors?
All CD74HC253MT 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 CD74HC253MT meets industry standards.
7.What is the process for return or replacement of CD74HC253MT?
All CD74HC253MT units undergo pre-shipment inspection (PSI). If there is an issue with CD74HC253MT, 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 CD74HC253MT part is unused and in its original packaging.
Return procedure for CD74HC253MT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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