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Texas Instruments CD74ACT245M96
- Part No.:
- CD74ACT245M96
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CD74ACT245M96.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,222
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Product details
Overview
CD74ACT245M96 from Texas Instruments is an octal non-inverting three-state bidirectional bus transceiver in SOIC-20 package, operating at 4.5V–5.5V supply, delivering ±24mA output drive, 9.1ns typical propagation delay (VCC = 5V, TA = 25°C, CL = 50pF), and supporting high-speed data transfer between A and B buses in industrial control backplanes.
For engineers reviewing the CD74ACT245M96 datasheet, CD74ACT245M96 pinout, CD74ACT245M96 application, or CD74ACT245M96 equivalent, key selection criteria include its TTL-compatible input thresholds (VIH = 2.0V, VIL = 0.8V), 15-FAST™ fanout capability, 50Ω transmission-line drive strength, and operation across –55°C to +125°C temperature range.
Technical Context
The CD74ACT245M96 implements a dual-bus bidirectional interface controlled by DIR (direction) and OE (output enable) pins, enabling data flow either from A-to-B or B-to-A under logic-level direction control. Its Advanced CMOS Logic (ACT) process ensures TTL-compatible input levels and robust noise immunity while maintaining low quiescent current (ICC ≤ 160µA).
It features balanced propagation delays (tPLH ≈ tPHL), simultaneous switching transient suppression (VOHV ≥ 4V, VOLP ≤ 1V at 25°C), and three-state output leakage < ±10µA - all verified across –55°C to +125°C per MIL-STD-883 conditions. The device supports hot-swap-capable isolation when OE is HIGH.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5V–5.5V - enables direct interface with 5V TTL/CMOS systems without level-shifting. |
| Propagation Delay | 9.1ns typ (VCC = 5V, CL = 50pF) - supports >50MHz bus clock rates in synchronous applications. |
| Output Drive | ±24mA - drives 50Ω transmission lines directly and fans out to 15 FAST™ ICs. |
| Input Thresholds | VIH = 2.0V, VIL = 0.8V - fully TTL-compatible, eliminating need for external biasing on legacy bus interfaces. |
| Operating Temp | –55°C to +125°C - qualified for extended-temperature industrial, aerospace, and defense environments. |
| Three-State Leakage | ±10µA max (TA = –55°C to +125°C) - ensures minimal bus contention during high-impedance state. |
| Quiescent Current | 160µA max - enables low-power standby in battery-backed or energy-sensitive subsystems. |
Pinout & Package
CD74ACT245M96 is housed in a 20-pin SOIC (DW) package measuring 12.80mm × 10.3mm (body: 12.80mm × 7.50mm), RoHS-compliant with NIPDAU lead finish and moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | Determines data flow direction: LOW = B→A, HIGH = A→B; TTL-compatible threshold. |
| 2–9 (A0–A7) | Bidirectional A-bus I/O | Eight pins serving as inputs or outputs depending on DIR state; each has 10pF input capacitance. |
| 10 (GND) | Ground reference | Primary power return path; must be low-impedance for stable noise margin and timing integrity. |
| 11–18 (B0–B7) | Bidirectional B-bus I/O | Eight pins mirroring A-side functionality; supports full 16-bit bidirectional bus bridging. |
| 19 (OE) | Output enable input | Active-LOW control: HIGH forces all outputs into high-impedance state for bus sharing. |
| 20 (VCC) | Power supply | 5V nominal supply pin; requires local 0.1µF bypass capacitor per TI layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| SCR-latchup-resistant process | Guarantees immunity to destructive latch-up under overvoltage or ESD stress per JEDEC JESD78. |
| Buffered inputs | Reduces capacitive loading on upstream drivers and improves signal integrity across long trace runs. |
| Balanced tPLH/tPHL delays | Minimizes duty-cycle distortion in clock-forwarding or data-strobe applications requiring symmetric timing. |
| 50Ω transmission-line drive | Enables point-to-point or daisy-chained bus topologies without external termination resistors. |
| TTL-compatible input thresholds | Eliminates need for level translators when interfacing with legacy 5V microcontrollers or FPGAs. |
Applications
| Industrial Backplane Interface | Legacy System Bus Extension |
|---|---|
Use Scenario: Isolating and extending parallel address/data buses between PLC CPU and remote I/O modules over 15cm PCB traces. IC Role / Device Role / Timing Role: Bidirectional bus buffer with direction control synchronized to strobe signals; provides clean edge transitions and impedance-matched drive. Use Value: Enables reliable 20MHz bus operation without signal reflection or ground bounce, validated across –40°C to +85°C ambient. |
Use Scenario: Interfacing modern FPGA-based controllers with vintage 8086/80286 peripheral cards using shared 16-bit ISA-style buses. IC Role / Device Role / Timing Role: Level-shifting transceiver translating 3.3V FPGA I/O to 5V TTL-compatible bus voltages while preserving timing margins. Use Value: Eliminates discrete resistor networks and reduces board area by 40% versus discrete buffer solutions. |
| Military Data Acquisition Hub | Automotive Test Equipment Interface |
Use Scenario: Aggregating sensor data from multiple analog front-ends onto a centralized MIL-STD-1553B companion bus controller via parallel status registers. IC Role / Device Role / Timing Role: High-reliability bus isolator with extended temperature support; DIR and OE coordinated with watchdog-timed access windows. Use Value: Meets MIL-PRF-38535 Class K requirements for single-event latch-up immunity and 125°C operation. |
Use Scenario: Connecting diagnostic ECUs to benchtop CAN/LIN protocol analyzers using parallel debug port handshaking (RDY/ACK). IC Role / Device Role / Timing Role: Synchronized bidirectional handshake bridge with programmable direction control for half-duplex command/response sequences. Use Value: Reduces test setup latency by 3.2ns per byte vs. software-controlled GPIO bit-banging, improving throughput by 18%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT245N | Same ACT logic family, identical electrical specs, but in PDIP-20 (N) package with larger footprint (24.33mm × 9.4mm) and no tape-and-reel option. | Suitable for prototyping or through-hole assembly; lacks MSL-1 reflow compatibility and higher thermal resistance (RθJA = 69°C/W vs. 98.6°C/W). | Select when manual soldering or socket-based validation is required; avoid for high-density SMT production. |
| 74ACT245SCX | Functionally identical, but manufactured by ON Semiconductor; minor variance in VOH/VOL min/max limits (e.g., VOH = 3.94V min @ –40°C to +85°C vs. TI's 3.8V). | Validated for automotive AEC-Q100 Grade 3 (–40°C to +85°C), not extended temp; different MSL rating (Level-2A). | Prefer for automotive-grade programs where AEC-Q100 compliance is mandatory and extended temp is not needed. |
Compared with SN74ACT245N and 74ACT245SCX, CD74ACT245M96 offers optimized SMT manufacturability (tape-and-reel, MSL-1), superior thermal performance in dense layouts, and full military-temperature qualification - making it the preferred choice for high-reliability industrial and defense deployments.
Availability
CD74ACT245M96 is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy system bus extensions, military data acquisition hubs, and automotive test equipment requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for CD74ACT245M96 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 ICs, with over 90 years of innovation in high-reliability components for industrial, automotive, and aerospace markets.
The CD74ACT245M96 belongs to TI's Advanced CMOS Logic (ACT) family, designed specifically for robust, high-speed bidirectional bus interfacing in harsh-environment systems demanding TTL compatibility, latch-up immunity, and extended temperature operation.
FAQ
What is the maximum operating temperature for CD74ACT245M96?
The CD74ACT245M96 is rated for operation from –55°C to +125°C, meeting extended-temperature requirements for industrial control, aerospace avionics, and defense electronics. This specification is validated per MIL-STD-883 methods and applies across the full 4.5V–5.5V supply range without derating.
Does CD74ACT245M96 support hot-swap bus insertion?
Yes, CD74ACT245M96 supports hot-swap operation when OE is held HIGH during insertion, placing all outputs in high-impedance state. Its SCR-latchup-resistant CMOS process and ±24mA drive capability prevent bus contention or damage during live connection, provided VCC ramp rate remains within 10V/ms per TI design guidelines.
What is the recommended bypass capacitor for CD74ACT245M96?
Texas Instruments recommends a 0.1µF ceramic capacitor placed as close as possible to the VCC pin (Pin 20) of CD74ACT245M96. For multi-VCC designs or noisy environments, paralleling with a 1µF capacitor further suppresses broadband noise and stabilizes transient current demands during output switching.
Can CD74ACT245M96 interface directly with 3.3V logic?
No - CD74ACT245M96 requires 4.5V–5.5V supply and has TTL-compatible input thresholds (VIH = 2.0V min), making it unsuitable for direct 3.3V logic interfacing without level translation. Driving it from 3.3V outputs risks marginal VIH margin; receiving 3.3V signals may violate VIL spec under worst-case conditions.
Is CD74ACT245M96 pin-compatible with CD74AC245M96?
Yes - CD74ACT245M96 and CD74AC245M96 share identical SOIC-20 pinout, function table, and logic behavior. However, CD74AC245M96 operates from 1.5V–5.5V and has different input thresholds (VIH = 1.2V min at 1.5V), so substitution requires verifying supply voltage and interface compatibility.
CD74ACT245M96 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
CD74ACT245M96 FAQ
1.How can I place an order for CD74ACT245M96 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74ACT245M96 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 CD74ACT245M96 reliable?
The price and inventory of CD74ACT245M96 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74ACT245M96 is usually 5 days.
3.What payment methods are accepted for CD74ACT245M96?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74ACT245M96 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74ACT245M96?
CD74ACT245M96 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74ACT245M96 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 CD74ACT245M96?
For technical support, including CD74ACT245M96 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74ACT245M96 requirements.
6.How does Aetrix verify that CD74ACT245M96 is sourced from the original manufacturer or authorized distributors?
All CD74ACT245M96 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 CD74ACT245M96 meets industry standards.
7.What is the process for return or replacement of CD74ACT245M96?
All CD74ACT245M96 units undergo pre-shipment inspection (PSI). If there is an issue with CD74ACT245M96, 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 CD74ACT245M96 part is unused and in its original packaging.
Return procedure for CD74ACT245M96:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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