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Texas Instruments CD74AC240M96
- Part No.:
- CD74AC240M96
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CD74AC240M96.pdf
- Description:
- IC BUFF INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,105
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Product details
Overview
CD74AC240M96 from Texas Instruments is an octal 3-state inverting buffer/line driver in SOIC-20 package, operating from 1.5 V to 5.5 V, delivering ±24 mA output drive per pin, with balanced propagation delays (max 10.1 ns at 5 V), and designed for bus interface and data routing in industrial control and instrumentation systems.
For engineers reviewing the CD74AC240M96 datasheet, CD74AC240M96 pinout, CD74AC240M96 application, or CD74AC240M96 equivalent, key selection criteria include its dual active-low output enables (1OE, 2OE), 50-Ω transmission-line drive capability, SCR-latch-up-resistant CMOS process, and −40°C to +85°C industrial temperature range.
Technical Context
The CD74AC240M96 implements two independent 4-bit inverting buffer banks, each controlled by a dedicated active-low output enable (1OE for Bank 1, 2OE for Bank 2). Its RCA Advanced CMOS process ensures compatibility with TTL input levels while maintaining low power consumption versus bipolar FAST logic.
It supports mixed-voltage system interfacing via 1.5–5.5 V operation, exhibits balanced noise immunity (30% of VCC), and features tightly matched tPLH/tPHL propagation delays-critical for skew-sensitive parallel bus applications such as address/data latching and memory I/O buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.5 V to 5.5 V - Enables direct interface with 1.8 V, 3.3 V, and 5 V logic domains without level shifters. |
| Output Drive | ±24 mA per output - Sufficient to fan out to 15 FAST ICs or directly drive 50 Ω PCB traces. |
| Propagation Delay | Max 10.1 ns at VCC = 5 V - Supports >50 MHz bus operation with deterministic timing margins. |
| Input Thresholds | VIH = 3.85 V, VIL = 1.65 V at 5 V - TTL-compatible inputs ensure robust noise margin in mixed-signal environments. |
| Quiescent Current | Max 160 μA at +125°C - Ultra-low static power enables use in thermally constrained industrial modules. |
| ESD Rating | ≥2 kV HBM - Meets standard handling requirements for automated assembly without special ESD controls. |
| Operating Temp | −40°C to +85°C - Qualified for industrial-grade embedded systems including PLC I/O modules and sensor hubs. |
Pinout & Package
CD74AC240M96 is housed in a 20-pin SOIC (DW) package measuring 12.8 mm × 10.3 mm (including pins), with body size 12.8 mm × 7.5 mm. The thermal pad is optional and may be left floating or connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE | Active-low enable for Bank 1 (pins 12,14,16,18) | Drives all four Bank 1 outputs to high-impedance when high; enables inversion when low. |
| 2OE | Active-low enable for Bank 2 (pins 3,5,7,9) | Independent control allows time-multiplexed or isolated bus access between two data paths. |
| 1A0–1A3 | Bank 1 input channels | Invert and route signals to corresponding 1Y outputs (1Y0–1Y3); support asynchronous data flow. |
| 2A0–2A3 | Bank 2 input channels | Parallel but electrically isolated path; enables dual-bus buffering without crosstalk. |
| 1Y0–1Y3 | Bank 1 inverted outputs | Matched delay outputs suitable for synchronous latch interfaces (e.g., 8080/8086-style data buses). |
| 2Y0–2Y3 | Bank 2 inverted outputs | Phase-aligned with Bank 1 outputs-enables simultaneous 8-bit bidirectional bus control. |
| VCC, GND | Power and reference | Dual power pins (pin 20, pin 10) reduce supply impedance and improve noise rejection on dense PCBs. |
Key Features
| Feature | Design Value |
|---|---|
| SCR-latch-up resistance | Guaranteed immunity to latch-up under transient overvoltage conditions per JEDEC JESD78, enabling reliable operation in noisy industrial environments. |
| Balanced propagation delays | tPLH and tPHL match within 0.5 ns at 5 V - eliminates setup/hold skew in parallel bus timing-critical designs. |
| 1.5–5.5 V wide supply range | Eliminates need for external voltage translators when interfacing legacy 5 V peripherals with modern 1.8 V/3.3 V controllers. |
| ±24 mA output drive | Directly drives terminated 50 Ω transmission lines without external buffers-reduces BOM count and layout area. |
| 3-State output control | Dual independent OE pins allow dynamic bus arbitration and hot-swap-safe peripheral isolation in modular backplane systems. |
Applications
| Industrial PLC I/O Modules | Test Equipment Signal Routing |
|---|---|
Use Scenario: Isolating and buffering digital I/O signals between microcontroller units and field actuators/sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing galvanically isolated signal conditioning and bus contention prevention on shared backplane data lines. Use Value: Enables deterministic 8-bit parallel read/write cycles with <10 ns propagation delay and ±24 mA drive into long cable runs or relay coils. | Use Scenario: Multiplexing stimulus/response signals between FPGA-based pattern generators and DUTs in automated test equipment. IC Role / Device Role / Timing Role: Dual-bank inverting buffer acting as reconfigurable signal path selector with independent enable control per bank. Use Value: Allows time-division multiplexing of two independent 4-bit data streams without cross-talk or timing skew between banks. |
| Medical Instrumentation Data Acquisition | Automotive Body Control Units |
Use Scenario: Interfacing ADC/DAC data buses to microcontrollers in portable diagnostic devices requiring low-power, noise-immune signal transfer. IC Role / Device Role / Timing Role: Low-noise, high-drive buffer ensuring clean sampling clock and data strobe integrity across multi-layer PCBs. Use Value: Delivers 30% noise immunity margin at 3.3 V supply and consumes only 160 μA max quiescent current-extending battery life. | Use Scenario: Managing discrete switch inputs (door locks, window switches) and LED driver outputs in centralized automotive body modules. IC Role / Device Role / Timing Role: Robust 3-state buffer translating 12 V switch signals to 3.3 V MCU inputs while driving high-current indicator LEDs. Use Value: Withstands automotive load dump transients up to 6 V and provides ±24 mA sink/source for direct LED control without external drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AC240N | Same AC logic family, identical electrical specs, but in PDIP-20 package (24.33 mm × 9.4 mm) with wider body and through-hole mounting. | Preferred for prototyping, manual assembly, or legacy through-hole PCBs; lacks SOIC thermal performance and density. | Select SN74AC240N when hand-soldering or board rework is required; CD74AC240M96 is optimal for automated SMT production. |
| CD74ACT240M96 | TTL-compatible input thresholds (VIH = 2.0 V), faster propagation (7.8 ns typ), but limited to 4.5–5.5 V supply range. | Better suited for pure 5 V systems with legacy TTL peripherals; incompatible with 1.8 V or 3.3 V logic without level shifting. | Choose CD74ACT240M96 only if interfacing exclusively with TTL sources; CD74AC240M96 offers broader voltage flexibility and lower static power. |
Compared with SN74AC240N and CD74ACT240M96, CD74AC240M96 uniquely combines wide 1.5–5.5 V operation, industrial temperature range, SOIC-20 surface-mount packaging, and ultra-low quiescent current-making it the most versatile choice for new industrial and portable electronics designs.
Availability
CD74AC240M96 is available at Aetrix Electronics and suitable for industrial automation, test equipment, medical instrumentation, and automotive body control applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for CD74AC240M96 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 for industrial, automotive, and communications markets.
The CD74AC240M96 belongs to TI's legacy Advanced CMOS (AC) logic family, engineered for high-speed, low-power bus interface applications where reliability, wide supply tolerance, and noise immunity are critical in harsh operating environments.
FAQ
What is the maximum operating temperature range for CD74AC240M96?
The CD74AC240M96 is rated for operation from −40°C to +85°C, meeting industrial-grade environmental requirements. This range is validated per TI's qualification standards and applies specifically to the M96 SOIC package variant, supporting deployment in factory-floor controllers, outdoor instrumentation, and other thermally demanding settings where extended temperature stability is essential.
Does CD74AC240M96 support 3.3 V logic systems?
Yes, CD74AC240M96 fully supports 3.3 V operation: its recommended supply range includes 3.3 V (within 1.5–5.5 V), input thresholds (VIH = 2.1 V, VIL = 0.9 V at 3 V) provide 1.2 V noise margin, and output drive (±24 mA) meets LVTTL and LVCMOS loading requirements-making CD74AC240M96 ideal for mixed-voltage 3.3 V/5 V system interfacing.
How does the dual output-enable architecture of CD74AC240M96 benefit system design?
The CD74AC240M96 features two independent active-low output enables (1OE and 2OE), allowing separate control of its two 4-bit inverting banks. This enables time-multiplexed bus sharing, isolated peripheral addressing, and hot-swap-safe signal gating-critical in modular backplanes and reconfigurable test fixtures where CD74AC240M96 prevents bus contention without software overhead.
Can CD74AC240M96 drive 50 Ω transmission lines directly?
Yes, CD74AC240M96 is explicitly characterized to drive 50 Ω transmission lines at +85°C, verified per TI's datasheet Section 4.4 footnote (2). Its ±24 mA output drive ensures clean signal integrity on controlled-impedance PCB traces up to 15 cm, eliminating need for external line drivers in compact industrial and instrumentation layouts using CD74AC240M96.
Is CD74AC240M96 pin-compatible with CD74ACT240M96?
Yes, CD74AC240M96 and CD74ACT240M96 share identical SOIC-20 pinout, package dimensions, and terminal functions-including matching 1OE, 2OE, input/output assignments, and power pin locations. However, they differ in input threshold voltages and supply range; CD74AC240M96 accepts 1.5–5.5 V while CD74ACT240M96 requires 4.5–5.5 V, so substitution requires voltage domain verification.
CD74AC240M96 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:
- Buffer, Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
CD74AC240M96 FAQ
1.How can I place an order for CD74AC240M96 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74AC240M96 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 CD74AC240M96 reliable?
The price and inventory of CD74AC240M96 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74AC240M96 is usually 5 days.
3.What payment methods are accepted for CD74AC240M96?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74AC240M96 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74AC240M96?
CD74AC240M96 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74AC240M96 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 CD74AC240M96?
For technical support, including CD74AC240M96 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74AC240M96 requirements.
6.How does Aetrix verify that CD74AC240M96 is sourced from the original manufacturer or authorized distributors?
All CD74AC240M96 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 CD74AC240M96 meets industry standards.
7.What is the process for return or replacement of CD74AC240M96?
All CD74AC240M96 units undergo pre-shipment inspection (PSI). If there is an issue with CD74AC240M96, 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 CD74AC240M96 part is unused and in its original packaging.
Return procedure for CD74AC240M96:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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