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Texas Instruments CD74ACT253M
- Part No.:
- CD74ACT253M
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD74ACT253M.pdf
- Description:
- IC MULTIPLEXER 2 X 4:1 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:415
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Product details
Overview
CD74ACT253M from Texas Instruments is a dual 4-input three-state multiplexer IC in SOIC-16 package, designed for high-speed digital signal routing with ±24mA output drive, 5.7ns typical propagation delay (S0/S1 to Y at VCC = 5V), and TTL-compatible input thresholds. It operates across -55°C to +125°C and supports common select lines S0/S1 for both sections, with independent output enables (1OE/2OE) enabling bus-sharing in industrial control and data acquisition systems.
For engineers reviewing the CD74ACT253M datasheet, CD74ACT253M pinout, CD74ACT253M application, or CD74ACT253M equivalent, this page delivers verified functional behavior, real-world timing constraints, SOIC-16 thermal and layout considerations, and validated drop-in alternatives for legacy logic upgrades and mixed-voltage system integration.
Technical Context
The CD74ACT253M implements two independent 4:1 multiplexers sharing S0 and S1 select inputs, each with dedicated three-state output enable (1OE, 2OE). Its ACT-series CMOS process ensures TTL-compatible input levels (VIH = 2.0V min, VIL = 0.8V max at VCC = 4.5–5.5V) and robust noise immunity at 30% of supply voltage.
It delivers balanced propagation delays (tPLH/tPHL ≤ 22ns max at 5V, -55°C to +125°C), supports 50Ω transmission-line driving, and features SCR-latchup resistance plus 2kV ESD protection per MIL-STD-883 Method 3015 - critical for ruggedized instrumentation and automotive body electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5V to 5.5V - ensures compatibility with standard 5V TTL and mixed-signal systems without level-shifting. |
| Propagation Delay (S0/S1 → Y) | 5.7ns typical at VCC = 5V, TA = 25°C - enables sub-100MHz clock-domain switching in synchronous logic designs. |
| Output Drive Current | ±24mA - directly drives 15 FAST™ ICs or terminates 50Ω PCB traces, eliminating external buffers in compact layouts. |
| Input Thresholds | VIH ≥ 2.0V, VIL ≤ 0.8V - guarantees reliable interfacing with legacy 5V TTL outputs without interface logic. |
| Operating Temperature | -55°C to +125°C - qualified for under-hood automotive, industrial PLC, and aerospace avionics environments. |
| Three-State Leakage | ±5µA max at 125°C - minimizes bus contention current and power loss during high-impedance states in shared-data-path systems. |
| ESD Protection | ≥2kV HBM - meets MIL-STD-883 Class 3015 requirements for handling and board-level reliability. |
Pinout & Package
CD74ACT253M is housed in a 16-pin SOIC (Small Outline Integrated Circuit) package, 3.9mm wide, with 1.27mm pitch, RoHS-compliant NiPdAu lead finish, and MSL Level-1 rating for unlimited reflow exposure.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15 | 1OE, 2OE | Active-HIGH output enable controls high-impedance state for each multiplexer section independently. |
| 2, 14 | S1, S0 | Common binary select inputs determining which of four data inputs (nI0–nI3) routes to output nY. |
| 3–6, 10–13 | 1I0–1I3, 2I0–2I3 | Eight data inputs - four per section - accepting TTL- or CMOS-level signals for routing selection. |
| 7 | GND | Ground reference for all internal circuitry and output drivers; requires low-inductance connection to minimize switching noise. |
| 8, 16 | 1Y, 2Y | Three-state outputs - driven low/high when OE active, high-Z when OE inactive - suitable for bidirectional bus arbitration. |
| 9, 16 | VCC | Positive supply pin - must be decoupled with 0.1µF ceramic capacitor near pin to suppress high-frequency supply ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Buffered Inputs | Reduces capacitive loading on upstream drivers and improves signal integrity across long PCB traces or fanout-heavy nodes. |
| Balanced Propagation Delays | Ensures consistent timing between rising/falling edges (tPLH ≈ tPHL), simplifying setup/hold margin analysis in synchronous designs. |
| SCR-Latchup Resistant Process | Prevents destructive latch-up events during transient overvoltage or hot-insertion, enhancing field-reliability in industrial backplanes. |
| 1.5V to 5.5V Operation (AC variant only) | Not applicable to CD74ACT253M - this part is ACT-series only (4.5–5.5V), ensuring strict TTL compatibility and noise margin. |
| ±24mA Output Drive | Eliminates need for external line drivers in 50Ω impedance-matched applications such as test equipment front-ends and sensor multiplexing. |
Applications
| Industrial Data Acquisition | Automotive Body Control Module |
|---|---|
Use Scenario: Multiplexing analog sensor signals (temperature, pressure, position) into a single ADC channel via external analog switches controlled by digital logic. IC Role / Device Role / Timing Role: Digital selector routing discrete control signals to configure analog switch addresses or enable specific sensor channels. Use Value: Enables 8-channel sensor scanning using one 4:1 mux pair and address sequencing logic, reducing component count and PCB area vs. discrete gate solutions. |
Use Scenario: Consolidating status signals (door open, seatbelt fastened, headlight status) onto a shared diagnostic bus within a BCM microcontroller subsystem. IC Role / Device Role / Timing Role: Three-state bus interface device allowing multiple status sources to share a common reporting line without contention. Use Value: Prevents bus collisions via independent 1OE/2OE control, supporting deterministic polling sequences and fault-isolation diagnostics. |
| Test Equipment Signal Routing | Legacy System Logic Upgrade |
Use Scenario: Switching between multiple DUT (device-under-test) signal paths in automated test fixtures requiring precise timing and low crosstalk. IC Role / Device Role / Timing Role: High-speed digital path selector synchronizing with pattern generator clocks to route stimulus/response signals. Use Value: 5.7ns propagation delay and 15pF output capacitance ensure minimal skew and clean edge fidelity up to 50MHz signal rates. |
Use Scenario: Replacing obsolete 74LS253 or 74F253 in aging industrial controllers where board space and power are constrained. IC Role / Device Role / Timing Role: Pin-compatible logic upgrade delivering identical functionality with lower ICCQ (8µA vs. >10mA for LS) and higher noise immunity. Use Value: Reduces system power by >99% in standby while maintaining full 5V TTL interoperability and PCB layout reuse. |
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 | PDIP-16 package; same electrical specs, higher θJA (~70°C/W vs. ~100°C/W for SOIC); no tape-and-reel option. | Preferred for prototyping or through-hole assembly; unsuitable for high-density SMT production or thermally constrained enclosures. | Select SN74ACT253N only when manual soldering or socket-based validation is required. |
| CD74HC253M | HC-series: wider 2–6V supply range, slower 16ns typical delay at 5V, ±5.2mA drive, no TTL input compatibility (VIH = 3.15V min). | Applicable in battery-powered or mixed-voltage systems but incompatible with legacy 5V TTL drivers without level translation. | Choose CD74HC253M only if supply flexibility or ultra-low static power (<2µA ICC) outweighs speed and interface compatibility needs. |
Compared with CD74ACT253M, SN74ACT253N offers identical logic and timing in through-hole form but limits thermal performance and automation readiness, while CD74HC253M trades speed and TTL compatibility for broader voltage operation and lower quiescent current - making CD74ACT253M optimal for high-integrity 5V industrial signal routing where timing precision and interface certainty are non-negotiable.
Availability
CD74ACT253M is available at Aetrix Electronics and suitable for industrial data acquisition, automotive body control modules, test equipment signal routing, and legacy system logic upgrades requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74ACT253M 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 technologies, with decades of heritage in high-reliability logic families including the 74ACT series.
The CD74ACT253M belongs to TI's Advanced CMOS Logic (ACT) product line, engineered specifically for drop-in replacement of bipolar TTL in high-speed, low-power industrial and automotive control systems requiring robust noise immunity and extended temperature operation.
FAQ
What is the maximum operating temperature range for CD74ACT253M?
The CD74ACT253M is fully specified from -55°C to +125°C across all electrical parameters, including propagation delay, output drive, and leakage current. This extended range is validated per TI's qualification standards and makes CD74ACT253M suitable for under-hood automotive, industrial motor drives, and aerospace environmental control units where thermal stress is severe.
Is CD74ACT253M pin-compatible with older 74LS253 or 74F253 devices?
Yes, CD74ACT253M uses the same 16-pin SOIC footprint and identical pinout as 74LS253 and 74F253, including matching assignments for S0, S1, I0–I3, Y, and OE pins. No PCB redesign is needed when upgrading, though users must verify that the reduced ICCQ (8µA vs. >10mA) and improved noise margins do not require changes to upstream pull-up/pull-down networks.
Does CD74ACT253M support 3.3V logic interfaces?
No - CD74ACT253M is an ACT-series device with a mandatory 4.5V–5.5V supply range and TTL-compatible input thresholds (VIH ≥ 2.0V, VIL ≤ 0.8V). It cannot reliably accept 3.3V logic-high signals without external level shifting, unlike AC-series variants such as CD74AC253M which operate down to 1.5V and support mixed-voltage interfacing.
What is the output drive capability of CD74ACT253M and how does it affect PCB layout?
CD74ACT253M provides ±24mA per output, sufficient to drive 15 FAST™ ICs or terminate 50Ω transmission lines. This eliminates need for external buffers but demands careful PCB layout: use short, impedance-controlled traces for high-speed outputs, place 0.1µF decoupling capacitors within 3mm of VCC/GND pins, and avoid routing sensitive analog lines adjacent to Y outputs to prevent coupling.
How does the three-state enable function work on CD74ACT253M?
CD74ACT253M has two independent active-HIGH output enables: 1OE controls the first multiplexer's output (1Y), and 2OE controls the second (2Y). When either OE is HIGH, its corresponding Y output enters high-impedance state regardless of select or input states - enabling time-multiplexed bus sharing, isolated signal routing, or safe power-down sequencing without signal contention on shared lines.
CD74ACT253M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
CD74ACT253M FAQ
1.How can I place an order for CD74ACT253M through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74ACT253M 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 CD74ACT253M reliable?
The price and inventory of CD74ACT253M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74ACT253M is usually 5 days.
3.What payment methods are accepted for CD74ACT253M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74ACT253M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74ACT253M?
CD74ACT253M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74ACT253M 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 CD74ACT253M?
For technical support, including CD74ACT253M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74ACT253M requirements.
6.How does Aetrix verify that CD74ACT253M is sourced from the original manufacturer or authorized distributors?
All CD74ACT253M 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 CD74ACT253M meets industry standards.
7.What is the process for return or replacement of CD74ACT253M?
All CD74ACT253M units undergo pre-shipment inspection (PSI). If there is an issue with CD74ACT253M, 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 CD74ACT253M part is unused and in its original packaging.
Return procedure for CD74ACT253M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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