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Texas Instruments CD74ACT253EG4
- Part No.:
- CD74ACT253EG4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
CD74ACT253EG4.pdf
- Description:
- IC MULTIPLEXER 2 X 4:1 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,563
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Product details
Overview
CD74ACT253EG4 from Texas Instruments is a dual 4-input three-state multiplexer IC designed for high-speed digital signal routing in logic systems. It features ±24mA output drive, 5.7ns typical propagation delay (S0/S1 to Y at VCC = 5V), and operates across 4.5V–5.5V supply range. Used in address/data bus switching, function selection, and data path control in industrial controllers and test equipment.
For engineers reviewing the CD74ACT253EG4 datasheet, CD74ACT253EG4 pinout, CD74ACT253EG4 application, or CD74ACT253EG4 equivalent, key selection criteria include TTL-compatible input thresholds, 16-pin PDIP package compatibility, three-state enable timing (tPLZ/tPHZ ≤ 11.5ns), and ESD robustness (≥2kV per MIL-STD-883 Method 3015).
Technical Context
The CD74ACT253EG4 implements two independent 4:1 multiplexers sharing common select inputs S0 and S1, with individual three-state output enables (1OE, 2OE). Its ACT-series CMOS process delivers bipolar FAST™ speed with CMOS power efficiency and SCR-latchup immunity.
Each section selects one of four data inputs (nI0–nI3) based on binary S1/S0 state; when nOE is HIGH, the corresponding output (nY) enters high-impedance mode. Propagation delays are balanced between input-to-output (4.6ns typ.) and select-to-output (5.7ns typ.) paths at 5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5V to 5.5V - Ensures direct compatibility with standard 5V TTL/CMOS logic rails without level shifting. |
| Propagation Delay (nI to Y) | 4.6ns typical at VCC = 5V - Enables sub-10ns data path switching critical for high-speed control sequencing. |
| Propagation Delay (S0/S1 to Y) | 5.7ns typical at VCC = 5V - Supports synchronized multiplexer updates aligned with clock edges in state machines. |
| Output Drive Current | ±24mA - Drives 50Ω transmission lines directly and fans out to 15 FAST™ ICs without buffers. |
| ESD Protection | ≥2kV per MIL-STD-883 Method 3015 - Provides robust handling margin during board assembly and field service. |
| Input Thresholds | VIH = 2.0V min, VIL = 0.8V max - Guarantees reliable recognition of TTL-level signals across temperature (-55°C to 125°C). |
| Three-State Enable Time | tPLZ/tPHZ = 3.2ns typ. at VCC = 5V - Minimizes bus contention windows during output enable/disable transitions. |
Pinout & Package
CD74ACT253EG4 is supplied in a 16-lead plastic dual in-line package (PDIP), with 0.3-inch body width and through-hole mounting compatibility. Pin 1 is located at the top-left corner adjacent to the notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE | Section 1 Output Enable | Active-low control: HIGH forces 1Y into high-impedance; required for bus isolation in shared-data-path designs. |
| S1, S0 | Common Select Inputs | Binary address lines selecting one of four inputs per section; shared use reduces PCB routing complexity. |
| 1I0–1I3, 2I0–2I3 | Data Inputs | Eight total inputs accepting TTL/CMOS logic levels; each section independently selectable via S1/S0. |
| 1Y, 2Y | Three-State Outputs | Outputs drive 50Ω lines or interface with other logic; high-impedance state eliminates loading when disabled. |
| GND (Pin 8), VCC (Pin 16) | Power Terminals | Standard dual-rail supply connection; decoupling capacitor placement near Pin 8/16 minimizes switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Buffered Inputs | Reduces capacitive loading on upstream drivers and improves noise immunity on select/data lines. |
| Balanced Propagation Delays | Ensures consistent timing between select-to-output and data-to-output paths for glitch-free state transitions. |
| SCR-Latchup Resistant Process | Prevents destructive latch-up under transient overvoltage or ESD events in industrial environments. |
| 1.5V to 5.5V Operation (AC variant only) | Not applicable to CD74ACT253EG4 - this part is ACT-series only, specified for 4.5V–5.5V operation. |
| ±24mA Output Drive | Eliminates need for external line drivers when interfacing with 50Ω backplanes or long PCB traces. |
Applications
| Industrial PLC I/O Expansion | Digital Test Equipment Signal Routing |
|---|---|
Use Scenario: Multiplexing multiple sensor inputs or actuator outputs onto a shared microcontroller data bus in programmable logic controllers. IC Role / Device Role / Timing Role: Dual 4:1 selector enabling dynamic reconfiguration of analog/digital I/O channels under firmware control. Use Value: Reduces microcontroller GPIO count by 50% while maintaining deterministic 5.7ns select-to-output latency for real-time response. |
Use Scenario: Switching calibration reference signals, stimulus waveforms, or DUT feedback paths in automated test systems. IC Role / Device Role / Timing Role: High-speed signal path selector supporting <10ns timing resolution in pattern generators and ATE front-ends. Use Value: ±24mA drive capability allows direct connection to 50Ω coaxial cabling without impedance-matching components. |
| Legacy Bus Arbitration Interface | Embedded System Function Selection |
Use Scenario: Isolating competing peripherals (e.g., UART, SPI, memory) on a shared 8-bit data bus in retro-computing or avionics subsystems. IC Role / Device Role / Timing Role: Three-state multiplexer acting as bidirectional bus gate controlled by address decode logic. Use Value: 3.2ns enable/disable timing prevents bus contention during arbitration handshaking sequences. |
Use Scenario: Configuring operating modes (e.g., debug vs. production, low-power vs. performance) in medical or automotive ECUs. IC Role / Device Role / Timing Role: Hardware-based function selector decoding boot-time strap pins or configuration EEPROM bits. Use Value: TTL-compatible input thresholds ensure reliable detection of weak pull-up/pull-down states across wide temperature ranges. |
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 | Identical pinout, AC/ACT electrical specs, and functional behavior; manufactured by TI with same die and packaging process. | No functional or timing difference; SN74ACT253N is TI's current-standardized prefix for the same device family. | Select SN74ACT253N for new designs requiring TI's latest qualification and long-term availability assurance. |
| 74ACT253PC | Same logic function and pinout; manufactured by ON Semiconductor with identical ACT-series specifications and 4.5V–5.5V operation. | Validated for same industrial temperature range (-55°C to 125°C); RoHS-compliant lead finish differs (NiPdAu vs. NIPDAU). | Choose 74ACT253PC when dual-sourcing or second-source qualification is required for supply chain resilience. |
Compared with CD74ACT253EG4, SN74ACT253N offers identical performance with updated TI branding and lifecycle support, while 74ACT253PC provides a fully compatible second-source alternative with equivalent timing, drive strength, and thermal rating - both avoid PCB redesign but differ in manufacturer-specific reliability reporting and traceability protocols.
Availability
CD74ACT253EG4 is available at Aetrix Electronics and suitable for industrial automation, test instrumentation, and embedded control applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74ACT253EG4 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 specializing in analog, embedded processing, and logic solutions, with decades of leadership in high-reliability logic families.
The CD74ACT253EG4 belongs to TI's Advanced CMOS Logic (ACT) series, engineered for applications demanding TTL-compatible speed with CMOS power efficiency and robustness in harsh environments.
FAQ
What is the operating temperature range for CD74ACT253EG4?
The CD74ACT253EG4 is rated for operation from -55°C to +125°C, making it suitable for aerospace, military, and industrial applications where extreme ambient conditions are expected. This full military-grade temperature range is confirmed in the Absolute Maximum Ratings table and supported across all DC and AC electrical specifications in the datasheet.
Does CD74ACT253EG4 support 3.3V logic interfaces?
No, CD74ACT253EG4 does not support 3.3V operation. It is an ACT-series device specified only for 4.5V to 5.5V supply voltage. Its input thresholds (VIH ≥ 2.0V, VIL ≤ 0.8V) and output drive characteristics are optimized for 5V TTL compatibility - using it at 3.3V violates datasheet operating conditions and risks unreliable switching or increased static current.
How many output enable controls does CD74ACT253EG4 have?
The CD74ACT253EG4 has two independent active-low output enable inputs: 1OE controls the first multiplexer section (1Y), and 2OE controls the second (2Y). This allows selective three-state control of each output, enabling time-multiplexed bus sharing or independent channel gating without affecting the other section.
What is the maximum fanout capability of CD74ACT253EG4?
The CD74ACT253EG4 provides ±24mA output drive, enabling direct fanout to up to 15 FAST™ logic ICs or driving 50Ω transmission lines. This specification is verified under worst-case conditions (VCC = 4.5V, TA = 125°C) and eliminates the need for external buffer stages in most high-speed digital interconnect scenarios.
Is CD74ACT253EG4 pin-compatible with CD74AC253E?
Yes, CD74ACT253EG4 is pin-compatible with CD74AC253E - both share identical 16-pin PDIP footprint, pin numbering, and functional assignment. However, CD74AC253E operates from 1.5V to 5.5V and has different input thresholds and propagation delays; substituting them requires verifying supply voltage and timing margins in the target design.
CD74ACT253EG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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
CD74ACT253EG4 FAQ
1.How can I place an order for CD74ACT253EG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74ACT253EG4 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 CD74ACT253EG4 reliable?
The price and inventory of CD74ACT253EG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74ACT253EG4 is usually 5 days.
3.What payment methods are accepted for CD74ACT253EG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74ACT253EG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74ACT253EG4?
CD74ACT253EG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74ACT253EG4 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 CD74ACT253EG4?
For technical support, including CD74ACT253EG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74ACT253EG4 requirements.
6.How does Aetrix verify that CD74ACT253EG4 is sourced from the original manufacturer or authorized distributors?
All CD74ACT253EG4 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 CD74ACT253EG4 meets industry standards.
7.What is the process for return or replacement of CD74ACT253EG4?
All CD74ACT253EG4 units undergo pre-shipment inspection (PSI). If there is an issue with CD74ACT253EG4, 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 CD74ACT253EG4 part is unused and in its original packaging.
Return procedure for CD74ACT253EG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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