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Texas Instruments CD74ACT240M96
- Part No.:
- CD74ACT240M96
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CD74ACT240M96.pdf
- Description:
- IC BUFF INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,951
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Product details
Overview
CD74ACT240M96 from Texas Instruments is a 20-pin SOIC-packaged octal buffer/line driver with dual active-low 3-state outputs, ±24mA drive capability, 7.8ns max propagation delay at 5V, and operation across −40°C to +85°C. It serves as a bidirectional bus interface or address/data line driver in industrial control backplanes and legacy TTL-compatible logic systems.
For engineers reviewing the CD74ACT240M96 datasheet, CD74ACT240M96 pinout, CD74ACT240M96 application, or CD74ACT240M96 equivalent, key selection criteria include its ACT-series 5V-only operation, balanced tPLH/tPHL timing, 50Ω transmission-line drive support, and dual independent output-enable control for banked data routing.
Technical Context
The CD74ACT240M96 implements two independent 4-bit non-inverting buffer banks (Bank 1: pins 2,4,6,8 → 18,16,14,12; Bank 2: pins 11,13,15,17 → 3,5,7,9), each controlled by separate active-low OE signals (1OE on pin 1, 2OE on pin 19). Its RCA Advanced CMOS process ensures SCR latch-up resistance and TTL-compatible input thresholds (VIH = 2.0V min, VIL = 0.8V max at VCC = 4.5–5.5V).
It operates strictly within 4.5V–5.5V supply range and delivers rail-to-rail output swing with VOH ≥ 3.7V (at IO = −24mA, VCC = 4.5V) and VOL ≤ 0.5V (at IO = 24mA, VCC = 4.5V), enabling direct interfacing with standard 5V TTL and CMOS loads without level translation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5V to 5.5V - mandates dedicated 5V rail; incompatible with 3.3V or mixed-voltage systems |
| Propagation Delay | 7.8ns max (tPLH/tPHL, VCC = 5V) - supports >100MHz bus toggling with deterministic timing margins |
| Output Drive | ±24mA per pin - drives 15 FAST ICs or single-ended 50Ω transmission lines directly |
| Input Thresholds | VIH = 2.0V min, VIL = 0.8V max - ensures robust noise immunity and TTL-level compatibility |
| Operating Temp | −40°C to +85°C - qualified for industrial ambient environments without derating |
| Quiescent Current | 160μA max (ICC) - enables low-static-power operation in always-on control logic |
| 3-State Leakage | ±10μA max (IOZ) - prevents signal corruption during high-impedance bus sharing |
Pinout & Package
CD74ACT240M96 uses a 20-pin SOIC (DW) package measuring 12.8mm × 10.3mm (including pins), with body size 12.8mm × 7.5mm. Pin 10 is GND, pin 20 is VCC, and thermal pad is not present (RKS package only; DW has no thermal pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (1OE) | Active-low enable for Bank 1 | Assert low to enable outputs Y0–Y3 (pins 18,16,14,12); high places them in high-Z |
| 2,4,6,8 (1A0–1A3) | Bank 1 inputs | Non-inverting data inputs routed to corresponding Bank 1 outputs when 1OE active |
| 12,14,16,18 (1Y0–1Y3) | Bank 1 outputs | Driven copies of 1A0–1A3; tri-stated when 1OE high |
| 11,13,15,17 (2A0–2A3) | Bank 2 inputs | Non-inverting data inputs routed to corresponding Bank 2 outputs when 2OE active |
| 3,5,7,9 (2Y0–2Y3) | Bank 2 outputs | Driven copies of 2A0–2A3; tri-stated when 2OE high |
| 19 (2OE) | Active-low enable for Bank 2 | Assert low to enable outputs Y0–Y3 (pins 3,5,7,9); high places them in high-Z |
| 10 (GND) | Ground reference | Primary return path for all I/O and supply currents; must be low-impedance |
| 20 (VCC) | Positive supply | 5V power input; requires local 0.1μF bypass capacitor per TI layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| SCR-latch-up-resistant CMOS | Prevents destructive latch-up under transient overvoltage or ESD events in industrial environments |
| Balanced propagation delays | tPLH and tPHL match within 0.9ns (5V, −40°C to +85°C), minimizing skew in parallel bus applications |
| 50Ω transmission-line drive | Validated at +85°C to drive 50Ω PCB traces directly-eliminates need for external series termination |
| TTL-compatible input thresholds | VIH/VIL thresholds aligned to 5V TTL logic families, enabling seamless integration into legacy systems |
| Independent dual-bank control | Separate 1OE/2OE pins allow asynchronous enable/disable of two 4-bit data groups-critical for multiplexed address/data buses |
Applications
| Industrial Backplane Interface | Legacy System Bus Extender |
|---|---|
Use Scenario: Interfacing microcontroller address/data buses to modular I/O cards in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Bidirectional octal buffer isolating CPU bus from noisy field-side peripherals while maintaining timing integrity across 20cm backplane traces. Use Value: ±24mA drive ensures signal integrity on long 50Ω-controlled traces; dual OE allows staggered enable for glitch-free card hot-swap sequencing. | Use Scenario: Upgrading aging 74LS240-based instrumentation racks with lower-power, higher-speed logic. IC Role / Device Role / Timing Role: Pin-compatible replacement providing identical 20-pin SOIC footprint and function but with 3× faster propagation and 10× lower ICC. Use Value: Maintains full backward compatibility while reducing system power by >80% and enabling 25% higher clock rates in timing-critical sequencers. |
| Test Equipment Signal Routing | Automated Test Fixture Driver |
Use Scenario: Multiplexing multiple DUT (device-under-test) signal lines through a shared test head interface. IC Role / Device Role / Timing Role: 3-state octal driver enabling dynamic reconfiguration of signal paths under microcontroller control. Use Value: Independent 1OE/2OE control permits simultaneous enable of different signal groups-reducing test cycle time by eliminating sequential bus arbitration delays. | Use Scenario: Driving high-capacitance relay matrices and LED status indicators in production test jigs. IC Role / Device Role / Timing Role: High-current buffer stage translating low-drive MCU GPIOs to robust 24mA outputs capable of switching mechanical relays. Use Value: Eliminates need for discrete transistor drivers; integrated 50Ω drive capability reduces trace ringing on 15cm fixture wiring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer/line driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT240N | Same ACT-series specs, but in 20-pin PDIP (N) package; RθJA = 40°C/W vs. 101.2°C/W for SOIC | Preferred for prototyping or through-hole assembly; unsuitable for space-constrained SMT layouts | Select when manual soldering, breadboarding, or thermal dissipation >1W is required |
| CD74AC240M96 | AC-series variant: wider 1.5–5.5V supply range, slower 10.1ns max delay, lower ±24mA drive at 3.3V | Supports mixed-voltage systems (e.g., 3.3V MCU + 5V peripherals); less suitable for high-speed 5V-only buses | Select when supply voltage flexibility or multi-rail interoperability outweighs speed requirements |
Compared with SN74ACT240N and CD74AC240M96, CD74ACT240M96 uniquely balances high-speed 5V operation, compact SOIC packaging, and industrial temperature rating-making it optimal for volume SMT production of 5V bus interfaces where board area and thermal management are constrained.
Availability
CD74ACT240M96 is available at Aetrix Electronics and suitable for industrial control backplanes, legacy system upgrades, automated test fixtures, and instrumentation signal routing requiring stable component supply and long-term manufacturability.
Supply support for CD74ACT240M96 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The CD74ACT240M96 belongs to TI's legacy logic portfolio designed for robust, pin-compatible replacements of bipolar TTL devices-emphasizing reliability, wide temperature operation, and direct interoperability with existing 5V infrastructure.
FAQ
What is the maximum operating supply voltage for CD74ACT240M96?
The CD74ACT240M96 has an absolute maximum supply voltage of 6V, but its recommended operating range is strictly 4.5V to 5.5V per TI's datasheet Section 4.2. Operation outside this window risks undefined logic behavior or accelerated parametric drift. The CD74ACT240M96 is not rated for 3.3V operation-unlike AC-series variants-and must be powered from a regulated 5V source.
Does CD74ACT240M96 support hot-swapping or live insertion into a powered bus?
The CD74ACT240M96 features SCR-latch-up-resistant CMOS technology and specified I/O diode current limits (±20mA), enabling limited hot-swap tolerance when proper current-limiting and slew-rate control are implemented externally. However, TI does not guarantee safe live insertion without additional protection circuitry; the CD74ACT240M96 itself lacks built-in hot-swap controllers or soft-start features.
Can CD74ACT240M96 drive standard RS-422 or RS-485 differential receivers?
No, the CD74ACT240M96 is a single-ended CMOS buffer and cannot directly drive RS-422 or RS-485 differential receivers. Its outputs swing rail-to-rail (0V to VCC) and lack differential pair generation or common-mode biasing. To interface with such standards, external differential line drivers (e.g., SN65LVDS1) must be used downstream of the CD74ACT240M96.
What is the meaning of the 'M96' suffix in CD74ACT240M96?
The 'M96' suffix denotes Texas Instruments' standard SOIC (DW) package supplied in large tape-and-reel format (2000 units per reel) with RoHS-compliant NiPdAu lead finish and Moisture Sensitivity Level 1 (unlimited floor life at ≤30°C/60% RH). It distinguishes this production-grade SMT variant from obsolete tube-packaged versions (e.g., CD74ACT240M) and PDIP alternatives (e.g., CD74ACT240E).
How does the dual-output-enable architecture of CD74ACT240M96 improve system timing?
The independent 1OE and 2OE pins allow precise, asynchronous control of two 4-bit data banks-enabling staggered enable/disable sequences that eliminate bus contention glitches during state transitions. This architecture reduces setup/hold timing violations in multiplexed address/data buses and simplifies FPGA or MCU firmware by removing the need for synchronized gating logic. The CD74ACT240M96 leverages this to achieve deterministic timing in real-time industrial communication layers.
CD74ACT240M96 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:
- 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
CD74ACT240M96 FAQ
1.How can I place an order for CD74ACT240M96 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74ACT240M96 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 CD74ACT240M96 reliable?
The price and inventory of CD74ACT240M96 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74ACT240M96 is usually 5 days.
3.What payment methods are accepted for CD74ACT240M96?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74ACT240M96 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74ACT240M96?
CD74ACT240M96 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74ACT240M96 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 CD74ACT240M96?
For technical support, including CD74ACT240M96 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74ACT240M96 requirements.
6.How does Aetrix verify that CD74ACT240M96 is sourced from the original manufacturer or authorized distributors?
All CD74ACT240M96 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 CD74ACT240M96 meets industry standards.
7.What is the process for return or replacement of CD74ACT240M96?
All CD74ACT240M96 units undergo pre-shipment inspection (PSI). If there is an issue with CD74ACT240M96, 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 CD74ACT240M96 part is unused and in its original packaging.
Return procedure for CD74ACT240M96:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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