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Texas Instruments CD74ACT253E
- Part No.:
- CD74ACT253E
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
CD74ACT253E.pdf
- Description:
- IC MULTIPLEXER 2 X 4:1 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:598
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Product details
Overview
CD74ACT253E from Texas Instruments is a dual 4-input three-state multiplexer in PDIP-16 package, implementing Advanced CMOS Logic with TTL-compatible inputs and ±24mA output drive. It features 5.7ns typical propagation delay (S→Y) at 5V, operates across -55°C to +125°C, and supports high-impedance outputs via independent 1OE/2OE controls for bus-sharing applications.
For engineers reviewing the CD74ACT253E datasheet, CD74ACT253E pinout, CD74ACT253E application, or CD74ACT253E equivalent, this device is selected for deterministic signal routing in industrial control logic, legacy TTL-compatible backplanes, and multi-source data selection where low skew, rail-to-rail output swing, and ESD-hardened operation are required.
Technical Context
The CD74ACT253E uses ACT-series CMOS process with TTL-level input thresholds (VIH = 2.0V min, VIL = 0.8V max at 4.5–5.5V), enabling direct interface with 74LS/74F families without level shifting. Its dual-section architecture shares S0/S1 select lines while maintaining independent output enables (1OE, 2OE) and outputs (1Y, 2Y).
All inputs are buffered, and the device exhibits balanced tPLH/tPHL delays (≤20ns max over temperature), SCR-latchup-resistant design, and guaranteed 50Ω transmission-line drive capability at 85°C per output - verified under worst-case switching conditions with CL = 50pF and input tr/tf = 3ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | ACT (Advanced CMOS with TTL input compatibility) |
| Supply Voltage Range | 4.5V to 5.5V - ensures stable operation in 5V systems with ±10% tolerance |
| Propagation Delay (S→Y) | 5.7ns typ / 22ns max at 5V, -40°C to +85°C - enables sub-45MHz multiplexing clock rates |
| Output Drive | ±24mA per output - directly drives 15 FAST™ ICs or 50Ω PCB traces without buffers |
| ESD Protection | ≥2kV HBM - meets MIL-STD-883 Method 3015 for handling in non-EPA environments |
| Operating Temperature | -55°C to +125°C - qualified for extended industrial and aerospace applications |
| Three-State Leakage | ±5µA max at 125°C - ensures minimal bus contention current during disable |
Pinout & Package
CD74ACT253E is housed in a 16-lead plastic dual in-line package (PDIP-N), with 0.3-inch body width and standard through-hole mounting footprint. Pin 1 is located at the top-left corner when the notch faces upward.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1OE | Active-HIGH enable for first multiplexer section; asserts high-impedance on 1Y when HIGH |
| 2 | S1 | MSB select input common to both sections; selects one of four data inputs per section |
| 3 | 1I3 | Data input 3 for first section; routed to 1Y when S1S0 = 11 |
| 4 | 1I2 | Data input 2 for first section; routed to 1Y when S1S0 = 10 |
| 5 | 1I1 | Data input 1 for first section; routed to 1Y when S1S0 = 01 |
| 6 | 1I0 | Data input 0 for first section; routed to 1Y when S1S0 = 00 |
| 7 | GND | Ground reference for all internal circuitry and I/O |
| 8 | 1Y | Three-state output for first section; reflects selected 1In when 1OE = LOW |
| 9 | VCC | Positive supply (4.5–5.5V); powers internal logic and output drivers |
| 10 | S0 | LSB select input common to both sections |
| 11 | 2I3 | Data input 3 for second section; routed to 2Y when S1S0 = 11 |
| 12 | 2I2 | Data input 2 for second section; routed to 2Y when S1S0 = 10 |
| 13 | 2I1 | Data input 1 for second section; routed to 2Y when S1S0 = 01 |
| 14 | 2I0 | Data input 0 for second section; routed to 2Y when S1S0 = 00 |
| 15 | 2Y | Three-state output for second section; reflects selected 2In when 2OE = LOW |
| 16 | 2OE | Active-HIGH enable for second multiplexer section |
Key Features
| Feature | Design Value |
|---|---|
| Buffered inputs | Reduces capacitive loading on upstream drivers and improves noise immunity on S0/S1 and data lines |
| Balanced propagation delays | tPLH and tPHL differ by ≤1.5ns - minimizes duty-cycle distortion in clock/data routing paths |
| SCR-latchup-resistant process | Guarantees immunity to latch-up events under transient overvoltage or hot-swap conditions |
| 1.5V to 5.5V AC compatibility | Not applicable to CD74ACT253E - this part is ACT-only (4.5–5.5V), unlike AC variants |
| ±24mA output drive | Enables fanout to 15 FAST™ loads or direct termination of 50Ω transmission lines without external resistors |
Applications
| Industrial PLC I/O Multiplexing | Legacy Bus Arbitration |
|---|---|
Use Scenario: Selecting among multiple analog sensor digitization channels before feeding into a shared ADC interface in a programmable logic controller. IC Role / Device Role / Timing Role: Dual-channel data selector synchronizing two independent 4-channel input banks onto a single serial data path with deterministic latency. Use Value: Eliminates need for discrete analog switches or additional logic gates; maintains <22ns channel-to-channel skew across full temperature range. |
Use Scenario: Managing access to a shared memory-mapped peripheral bus between multiple microcontroller units in an avionics subsystem. IC Role / Device Role / Timing Role: Three-state bus gate controlling which MCU's address/data signals propagate to the peripheral, using OE-controlled isolation. Use Value: Provides clean, glitch-free bus handoff with <12ns enable/disable delay and <5µA leakage in high-Z state at 125°C. |
| TTL-Compatible Test Equipment | Redundant Signal Routing |
Use Scenario: Routing stimulus signals from multiple pattern generators to a DUT in automated test equipment where legacy TTL-level timing margins must be preserved. IC Role / Device Role / Timing Role: Level-transparent multiplexer preserving TTL voltage thresholds and drive strength while adding selectability. Use Value: Delivers VIH ≥2.0V and VOL ≤0.1V at 24mA sink - matches 74F/74AS performance without translation circuitry. |
Use Scenario: Providing failover path selection between primary and backup sensor feeds in safety-critical engine control modules. IC Role / Device Role / Timing Role: Dual independent mux sections allow simultaneous monitoring of both paths while selecting one active output. Use Value: Enables real-time comparison and seamless switchover with identical propagation characteristics for both sections (Δt < 0.8ns). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 4-input multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT253N | Same ACT logic family, identical pinout and DC/AC specs; manufactured by TI with identical marking and packaging | No functional difference - SN74ACT253N is TI's standardized prefix; CD74ACT253E uses legacy Harris-derived prefix | Select SN74ACT253N for new designs requiring TI's current product lifecycle support and documentation alignment. |
| 74ACT253PC | Identical functionality and pinout; manufactured by ON Semiconductor with same AC/ACT specs but different MSL rating (Level-1 vs N/A) | Same electrical behavior; differs only in packaging traceability and reflow profile compliance | Choose 74ACT253PC when sourcing from ON Semi's authorized channels or requiring alternate supply chain diversification. |
Compared with CD74ACT253E, SN74ACT253N offers identical performance with updated TI branding and full lifecycle visibility, while 74ACT253PC provides second-source assurance with matched timing and drive strength but distinct manufacturing traceability.
Availability
CD74ACT253E is available at Aetrix Electronics and suitable for industrial control systems, legacy avionics interfaces, and test instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74ACT253E 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 since 1930.
The CD74ACT253E belongs to TI's legacy logic portfolio derived from Harris Semiconductor acquisition, designed specifically for high-reliability, TTL-compatible digital signal routing in harsh-environment applications.
FAQ
What is the maximum operating supply voltage for CD74ACT253E?
The CD74ACT253E has an absolute maximum supply voltage of 6V, but its specified operational range is strictly 4.5V to 5.5V. Operating outside this window may cause undefined logic states or excessive ICC, and is not guaranteed per the datasheet's ACT-type specifications. The CD74ACT253E is not rated for 3.3V or 2.5V operation - use CD74AC253E for wider voltage support.
Does CD74ACT253E support independent enable control for each multiplexer section?
Yes, CD74ACT253E provides fully independent output enable inputs: 1OE controls the first section's 1Y output, and 2OE controls the second section's 2Y output. When either enable is HIGH, its corresponding output enters high-impedance state regardless of select or input states - allowing true bidirectional bus isolation per channel.
What is the guaranteed propagation delay variation between S→Y and I→Y paths in CD74ACT253E?
At 5V and -40°C to +85°C, CD74ACT253E guarantees tPLH/tPHL(S→Y) ≤22ns and tPLH/tPHL(I→Y) ≤18ns. The maximum skew between these paths is therefore bounded at 4ns, ensuring predictable timing margins when cascading select and data signals in synchronous systems.
Can CD74ACT253E drive a 50Ω transmission line directly without external termination?
Yes, CD74ACT253E is explicitly characterized to drive 50Ω transmission lines at 85°C with 75mA sink/source capability verified per output. Its ±24mA drive strength and low output impedance (<10Ω typical) provide adequate edge rate control and signal integrity for short-to-medium length PCB traces up to 15cm.
Is CD74ACT253E pin-compatible with CD74AC253E?
Yes, CD74ACT253E and CD74AC253E share identical PDIP-16 pinout, terminal functions, and truth table behavior. However, CD74AC253E operates from 1.5V to 5.5V and has different input thresholds (VIH = 1.2V min at 1.5V), whereas CD74ACT253E is optimized for 4.5–5.5V with TTL-compatible inputs - voltage range mismatch prevents direct substitution without system-level validation.
CD74ACT253E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- 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:
- 75mA, 75mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
CD74ACT253E FAQ
1.How can I place an order for CD74ACT253E through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74ACT253E 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 CD74ACT253E reliable?
The price and inventory of CD74ACT253E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74ACT253E is usually 5 days.
3.What payment methods are accepted for CD74ACT253E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74ACT253E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74ACT253E?
CD74ACT253E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74ACT253E 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 CD74ACT253E?
For technical support, including CD74ACT253E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74ACT253E requirements.
6.How does Aetrix verify that CD74ACT253E is sourced from the original manufacturer or authorized distributors?
All CD74ACT253E 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 CD74ACT253E meets industry standards.
7.What is the process for return or replacement of CD74ACT253E?
All CD74ACT253E units undergo pre-shipment inspection (PSI). If there is an issue with CD74ACT253E, 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 CD74ACT253E part is unused and in its original packaging.
Return procedure for CD74ACT253E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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