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Texas Instruments CD74AC245M96
- Part No.:
- CD74AC245M96
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CD74AC245M96.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,271
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Product details
Overview
CD74AC245M96 from Texas Instruments is an octal non-inverting three-state bidirectional bus transceiver in SOIC-20 package, operating from 1.5V to 5.5V, with ±24mA output drive, 4ns typical propagation delay at 5V/25°C/50pF, and SCR-latchup-resistant CMOS logic - used for level-shifting and bidirectional data flow control between microcontroller buses and peripheral subsystems.
For engineers reviewing the CD74AC245M96 datasheet, CD74AC245M96 pinout, CD74AC245M96 application, or CD74AC245M96 equivalent, key selection criteria include its wide VCC range (1.5–5.5V), balanced noise immunity (30% of supply), 50Ω transmission-line drive capability, and compatibility with FAST™-level timing while consuming significantly less power.
Technical Context
The CD74AC245M96 implements a dual-bus bidirectional interface controlled by DIR (direction) and OE (output enable) pins, enabling A-to-B or B-to-A data transfer under positive-logic control. Its Advanced CMOS process ensures latchup resistance and stable operation across –55°C to +125°C.
It features buffered inputs, balanced propagation delays (tPLH ≈ tPHL), and three-state outputs with low leakage (±5µA max at 5.5V). The device supports mixed-voltage interfacing due to its 1.5V–5.5V supply range and TTL-compatible input thresholds at 5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.5V to 5.5V - enables interoperability across 1.8V, 3.3V, and 5V logic domains without level shifters. |
| Propagation Delay (tPLH/tPHL) | 4ns typical at VCC = 5V, TA = 25°C, CL = 50pF - matches FAST™ speed grade with CMOS power efficiency. |
| Output Drive | ±24mA per pin - drives 15 FAST™ ICs or directly terminates 50Ω transmission lines. |
| Three-State Leakage (IOZ) | ±5µA max at VCC = 5.5V - ensures minimal bus contention during high-impedance state. |
| Input Thresholds (VIH/VIL) | VIH = 3.85V min, VIL = 1.65V max at VCC = 5.5V - provides robust TTL-compatible switching margins. |
| Quiescent Current (ICC) | 160µA max over full temperature range - supports low-power standby modes in battery-sensitive systems. |
| ESD Rating | SCR-latchup-resistant design - withstands system-level ESD events without functional disruption. |
Pinout & Package
CD74AC245M96 uses a 20-pin SOIC (DW) package measuring 12.80mm × 10.3mm (body: 12.80mm × 7.50mm), with standard JEDEC MS-013 outline and Level-1 moisture sensitivity rating (260°C reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | Determines data flow direction: LOW = B→A, HIGH = A→B; must be driven to avoid undefined bus state. |
| 2–9 (A0–A7) | Bidirectional I/O port A | Connects to source bus (e.g., microcontroller data bus); functions as input or output depending on DIR. |
| 10 (GND) | Ground reference | Primary return path for all signals and power; requires low-inductance connection to system ground plane. |
| 11–18 (B0–B7) | Bidirectional I/O port B | Connects to destination bus (e.g., peripheral or memory bus); complements A-port under DIR control. |
| 19 (OE) | Output enable input | Active-LOW: HIGH disables both A and B ports into high-impedance state, isolating buses. |
| 20 (VCC) | Power supply | Single supply input (1.5–5.5V); requires local 0.1µF bypass capacitor placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply voltage range | 1.5V–5.5V operation enables direct interface between 1.8V FPGAs and 5V legacy peripherals without external level shifters. |
| High-speed CMOS performance | 4ns typical propagation delay at 5V matches bipolar FAST™ timing while reducing dynamic power by >50% versus equivalent TTL. |
| Robust output drive | ±24mA per pin sustains signal integrity on 50Ω PCB traces up to 15cm, eliminating need for external line drivers in short-haul bus designs. |
| Three-state bus isolation | Low IOZ (±5µA max) and fast disable/enable times (12.7ns typ) prevent bus contention during hot-swap or multi-master arbitration. |
| Latchup immunity | SCR-latchup-resistant process eliminates risk of destructive latchup when driving capacitive loads or experiencing supply sequencing faults. |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module Bus Extension |
|---|---|
Use Scenario: Isolating and extending CAN or LIN controller data buses to distributed I/O modules across a metal chassis. IC Role / Device Role / Timing Role: Bidirectional bus transceiver managing data flow between MCU and remote sensor/actuator clusters via shielded twisted-pair cabling. Use Value: ±24mA drive ensures reliable 50Ω line termination over 1m runs; wide VCC range accommodates 3.3V MCU and 5V analog front-end supplies. |
Use Scenario: Bridging infotainment SoC (1.8V/3.3V) with legacy 5V HVAC or lighting driver ICs in centralized body control units. IC Role / Device Role / Timing Role: Voltage-tolerant level-shifting transceiver enabling synchronous read/write operations across mixed-voltage subsystems. Use Value: 1.5V–5.5V operation eliminates discrete level shifters; 4ns delay preserves timing margins in 20MHz parallel control buses. |
| Test Equipment Digital Pattern Generator | Medical Imaging Data Acquisition Interface |
Use Scenario: Driving high-speed digital stimulus patterns from FPGA-based pattern generators into DUTs with varying logic families (TTL, CMOS, LVTTL). IC Role / Device Role / Timing Role: Programmable-direction bus buffer synchronizing test vectors with precise edge alignment and load-driven signal integrity. Use Value: Balanced tPLH/tPHL minimizes skew between parallel data bits; ±24mA drive maintains clean edges into 50Ω scope probes or DUT inputs. |
Use Scenario: Interfacing high-resolution ADC/DAC modules (5V analog domain) with low-power ARM-based processing units (1.8V/3.3V I/O). IC Role / Device Role / Timing Role: Bidirectional data conduit for real-time sensor data streaming and calibration command delivery in safety-critical imaging pipelines. Use Value: SCR-latchup resistance prevents field failure during ESD-prone cable insertion; –55°C to +125°C rating supports fanless enclosure operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245A | Lower VCC range (1.65–3.6V), 24mA drive, 3.5ns delay at 3.3V - optimized for 3.3V-only systems. | Not suitable for 5V bus interfacing or mixed 1.8V/5V domains without additional translation. | Select when operating exclusively within 1.65–3.6V logic and requiring lower static current (10µA ICC). |
| 74AC245SCX | Same AC logic family, PDIP-20 package (not SOIC), identical electrical specs but different thermal resistance (RθJA = 69°C/W vs. 98.6°C/W). | Preferred for prototyping or through-hole assembly; unsuitable for high-density SMT layouts requiring SOIC footprint. | Choose for breadboard evaluation or legacy board rework where SOIC mounting is unavailable. |
Compared with SN74LVC245A and 74AC245SCX, CD74AC245M96 uniquely supports 1.5V–5.5V operation in a space-efficient SOIC-20 package with proven latchup immunity - making it the only option for robust, mixed-voltage, surface-mount bus extension in industrial and automotive environments.
Availability
CD74AC245M96 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, automated test equipment, and medical imaging interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74AC245M96 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 and industrial-grade qualification.
CD74AC245M96 belongs to TI's CDx4AC advanced CMOS logic series, engineered for robust bidirectional bus interfacing in harsh environments - targeting applications demanding wide voltage tolerance, latchup immunity, and extended temperature operation.
FAQ
What is the maximum operating temperature for CD74AC245M96?
The CD74AC245M96 is rated for operation from –55°C to +125°C ambient temperature, validated across its full recommended supply range (1.5V–5.5V). This extended temperature capability is confirmed in Section 4.2 of the official datasheet and supports deployment in under-hood automotive and industrial control cabinet environments where passive cooling is used.
Does CD74AC245M96 support 1.8V logic levels?
Yes, CD74AC245M96 fully supports 1.8V logic operation: its minimum VCC is 1.5V, VIH is guaranteed at 1.2V (min) when VCC = 1.5V, and VOL remains ≤0.1V at 1.8V with 24mA sink - enabling direct interface with 1.8V FPGAs and low-voltage microcontrollers without level translation.
Can CD74AC245M96 replace CD74ACT245M96 in a design?
CD74AC245M96 can replace CD74ACT245M96 only if the system operates below 4.5V supply - because CD74ACT245 requires minimum 4.5V VCC, while CD74AC245 functions down to 1.5V. At 5V, both share identical pinout and timing, but AC types offer wider voltage flexibility and lower input thresholds.
What is the purpose of the DIR pin on CD74AC245M96?
The DIR (Direction) pin on CD74AC245M96 controls bidirectional data flow: when DIR = LOW, data transfers from B-port to A-port; when DIR = HIGH, data flows from A-port to B-port. It must be actively driven - floating DIR causes undefined bus behavior and potential contention.
Is CD74AC245M96 RoHS compliant and lead-free?
Yes, CD74AC245M96 is RoHS compliant and features NiPdAu (NIPDAU) lead finish, as confirmed in the Package Option Addendum. It carries MSL Level-1 rating (unlimited floor life at ≤30°C/60% RH) and is qualified for lead-free reflow up to 260°C peak temperature.
CD74AC245M96 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AC
- 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:
- 1.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
CD74AC245M96 FAQ
1.How can I place an order for CD74AC245M96 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74AC245M96 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 CD74AC245M96 reliable?
The price and inventory of CD74AC245M96 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74AC245M96 is usually 5 days.
3.What payment methods are accepted for CD74AC245M96?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74AC245M96 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74AC245M96?
CD74AC245M96 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74AC245M96 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 CD74AC245M96?
For technical support, including CD74AC245M96 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74AC245M96 requirements.
6.How does Aetrix verify that CD74AC245M96 is sourced from the original manufacturer or authorized distributors?
All CD74AC245M96 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 CD74AC245M96 meets industry standards.
7.What is the process for return or replacement of CD74AC245M96?
All CD74AC245M96 units undergo pre-shipment inspection (PSI). If there is an issue with CD74AC245M96, 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 CD74AC245M96 part is unused and in its original packaging.
Return procedure for CD74AC245M96:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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