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Texas Instruments CD74ACT540M96G4
- Part No.:
- CD74ACT540M96G4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CD74ACT540M96G4.pdf
- Description:
- IC BUFF INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,593
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Product details
Overview
CD74ACT540M96G4 from Texas Instruments is an octal inverting 3-state buffer/line driver with dual active-low output enables, designed for high-speed bus interface and data routing in industrial and military-grade systems. It operates at 4.5–5.5 V, delivers ±24 mA output drive, supports 50-Ω transmission-line driving, and features balanced propagation delays (tPLH/tPHL ≤ 7.2 ns at 5 V) across its eight channels.
For engineers reviewing the CD74ACT540M96G4 datasheet, CD74ACT540M96G4 pinout, CD74ACT540M96G4 application, or CD74ACT540M96G4 equivalent, key selection criteria include TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V), 3-state leakage current (±10 µA max), thermal resistance (RθJA = 101.2 °C/W), and SOIC-20 packaging for space-constrained PCB layouts.
Technical Context
The CD74ACT540M96G4 implements Advanced CMOS (ACT) logic with TTL-compatible input thresholds and rail-to-rail output swing. Its dual active-low output-enable inputs (OE1, OE2) allow independent control of output states-high-impedance when asserted, inverted logic pass-through when deasserted.
It targets noise-immune digital bus buffering where simultaneous switching of multiple outputs must be managed: VOHV (min. 4 V) and VOLP (max. 1 V) are specified during adjacent-output switching events, and CPD = 60 pF defines dynamic power consumption per channel under 50-pF load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5–5.5 V - Ensures compatibility with 5-V TTL and mixed-voltage logic systems without level shifting. |
| Output Drive | ±24 mA - Sufficient to directly drive 15 FAST® ICs or terminate 50-Ω transmission lines without external drivers. |
| Propagation Delay | ≤ 7.2 ns (tPHL, 5 V) - Enables reliable operation in high-speed address/data buses up to ~100 MHz clock domains. |
| Input Thresholds | VIH = 2 V, VIL = 0.8 V - Matches standard TTL logic levels for seamless interfacing with legacy controllers and FPGAs. |
| 3-State Leakage | ±10 µA (max, −55 to +125°C) - Guarantees low standby current in high-impedance mode across full military temperature range. |
| Thermal Resistance | RθJA = 101.2 °C/W (SOIC-20) - Supports continuous operation at up to +125°C ambient with minimal derating in typical PCB layouts. |
| ESD Rating | ±2000 V HBM - Meets industrial handling requirements without additional protection circuitry. |
Pinout & Package
CD74ACT540M96G4 is housed in a 20-pin SOIC (DW) package measuring 12.8 mm × 10.3 mm (body: 12.8 mm × 7.5 mm), RoHS-compliant with NiPdAu lead finish and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (!MR) | Master Reset (active-low) | Global asynchronous reset that forces all outputs to high-impedance regardless of OE state; used for system initialization or fault recovery. |
| 2 (Q0)–9 (Q3), 12 (Q4)–19 (Q7) | Inverted Output (Y = !A) | Eight buffered, inverted outputs with 3-state capability; each sinks or sources up to ±24 mA into loads. |
| 3 (D0)–4 (D1), 7 (D2)–8 (D3), 13 (D4)–14 (D5), 17 (D6)–18 (D7) | Data Input (A) | Eight parallel TTL-compatible inputs; VIH/VIL thresholds ensure robust noise margin in electrically noisy environments. |
| 10 (GND) | Ground Reference | Primary return path for logic and output currents; requires local 0.1 µF bypass capacitor per VCC pin. |
| 11 (CP) | Clock Input | Rising-edge-triggered clock input used in synchronous applications; not required for basic buffer operation but enables timing-critical latching. |
| 20 (VCC) | Power Supply | Single 4.5–5.5 V supply; ICC quiescent current ≤ 160 µA ensures low static power in always-on subsystems. |
Key Features
| Feature | Design Value |
|---|---|
| SCR-latchup-resistant process | Guarantees immunity to destructive latch-up under transient overvoltage or ESD stress in harsh industrial/military environments. |
| Balanced tPLH/tPHL delays | Minimizes skew between rising/falling edges across all eight channels, critical for clean bus timing and reduced setup/hold violations. |
| 50-Ω transmission-line drive | Validated at +85°C and +125°C - eliminates need for external series termination resistors in high-speed backplane or board-level interconnects. |
| TTL-compatible input thresholds | VIH = 2 V / VIL = 0.8 V - enables direct connection to legacy microcontrollers, CPLDs, and ASICs without level-shifting components. |
| Two independent OE controls | OE1 and OE2 allow partitioned bus control (e.g., upper/lower byte enable), supporting flexible memory-mapped I/O or multi-drop bus arbitration schemes. |
Applications
| Memory Address Buffering | Industrial PLC I/O Expansion |
|---|---|
Use Scenario: Buffering 8-bit address lines between microcontroller and SRAM/Flash memory in embedded control systems operating at extended temperature ranges. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing isolation, fanout amplification, and bus contention prevention during memory read/write cycles. Use Value: ±24 mA drive strength ensures signal integrity across 10+ cm PCB traces; balanced propagation delays prevent address skew-induced memory access errors. | Use Scenario: Expanding digital input/output capacity in programmable logic controllers deployed in factory automation cabinets with ambient temperatures up to +85°C. IC Role / Device Role / Timing Role: Octal line driver translating controller logic levels to ruggedized field-side signals while enabling/disabling groups via dual OE pins. Use Value: SCR-latchup resistance prevents failure during voltage transients on industrial I/O lines; 125°C operation supports convection-cooled enclosures. |
| Military Data Bus Interface | Test Equipment Signal Conditioning |
Use Scenario: Interfacing FPGA-based avionics modules to MIL-STD-1553 or ARINC-429 bus transceivers requiring precise timing and high-reliability buffering. IC Role / Device Role / Timing Role: High-speed inverting buffer with deterministic 7.2 ns delay and simultaneous switching noise suppression (VOHV ≥ 4 V). Use Value: Guaranteed operation from −55°C to +125°C meets MIL-PRF-38535 Class K requirements; MSL Level-1 simplifies reflow assembly. | Use Scenario: Driving calibration reference signals and multiplexed test stimuli in automated test equipment (ATE) with strict jitter and edge-rate specifications. IC Role / Device Role / Timing Role: Precision line driver delivering fast, low-skew transitions to DUT inputs while maintaining high-Z isolation during signal reconfiguration. Use Value: 3-state leakage < ±10 µA ensures no DC loading during idle states; CPD = 60 pF enables predictable dynamic power modeling for thermal management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD74ACT540M96 | Same SOIC-20 package, identical electrical specs, but marked "ACT540M" (no G4 suffix); RoHS-compliant with same NiPdAu finish and MSL-1 rating. | No functional difference; G4 denotes specific tape-and-reel packaging variant (quadrant Q1 orientation), not performance divergence. | Select CD74ACT540M96G4 when quadrant-specific tape alignment is required for automated pick-and-place; otherwise CD74ACT540M96 is functionally interchangeable. |
| SN74ACT540N | PDIP-20 package (24.33 mm × 9.4 mm), wider body, higher RθJA (69 °C/W), same ACT logic family and pinout. | Suitable for prototyping, through-hole assembly, or legacy designs where SOIC footprint is incompatible. | Choose SN74ACT540N for hand-soldered evaluation or legacy board redesigns; avoid in thermally constrained or high-density surface-mount layouts. |
Compared with CD74ACT540M96G4, CD74ACT540M96 offers identical performance in a functionally equivalent reel variant, while SN74ACT540N trades thermal efficiency and miniaturization for mechanical robustness and assembly flexibility in through-hole systems.
Availability
CD74ACT540M96G4 is available at Aetrix Electronics and suitable for industrial control systems, military avionics interfaces, automated test equipment, and high-reliability embedded computing applications requiring stable component supply across extended temperature ranges.
Supply support for CD74ACT540M96G4 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 over 90 years of innovation in high-reliability electronics.
The CD74ACT540M96G4 belongs to TI's Advanced CMOS (ACT) logic family, engineered for TTL-compatible operation in demanding industrial, automotive, and defense applications where speed, noise immunity, and wide temperature range are critical.
FAQ
What is the maximum operating temperature range for CD74ACT540M96G4?
The CD74ACT540M96G4 is rated for operation from −55°C to +125°C, meeting extended industrial and military temperature requirements. This range is validated per JEDEC JESD22-A108 and confirmed in Section 4.3 of the official datasheet, with all electrical characteristics guaranteed across this full span.
Does CD74ACT540M96G4 require external pull-up or pull-down resistors on its input pins?
No, CD74ACT540M96G4 does not require external biasing on data or enable inputs. Its TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V) and low input leakage (±1 µA max) allow direct connection to CMOS or TTL outputs. Unused inputs should be tied to VCC or GND per Section 7.2.1 to prevent floating states.
Can CD74ACT540M96G4 drive a 50-Ω transmission line at +125°C?
Yes, CD74ACT540M96G4 is explicitly characterized to drive 50-Ω transmission lines at +125°C, as verified in Section 4.5 footnote (2) and Table 4-6. At 5.5 V supply and full temperature range, it maintains sufficient output current to meet the 75-Ω effective load requirement specified for high-temperature operation.
What is the meaning of the "G4" suffix in CD74ACT540M96G4?
The "G4" suffix in CD74ACT540M96G4 indicates a specific tape-and-reel packaging configuration with Pin 1 located in Quadrant Q1 of the carrier tape, per TI's Package Materials Information document. It does not denote a functional or parametric revision - electrical specs and SOIC-20 footprint match CD74ACT540M96 exactly.
Is CD74ACT540M96G4 pin-compatible with CD74AC540M96?
No, CD74ACT540M96G4 is not pin-compatible with CD74AC540M96. While both share the same SOIC-20 package and pinout, they differ in supply voltage range (ACT: 4.5–5.5 V; AC: 1.5–5.5 V), input thresholds, and propagation delay. Interchanging them risks incorrect logic levels or timing violations in 3.3-V or mixed-voltage systems.
CD74ACT540M96G4 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:
- Discontinued at Digi-Key
- Logic Type:
- Buffer, 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
CD74ACT540M96G4 FAQ
1.How can I place an order for CD74ACT540M96G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74ACT540M96G4 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 CD74ACT540M96G4 reliable?
The price and inventory of CD74ACT540M96G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74ACT540M96G4 is usually 5 days.
3.What payment methods are accepted for CD74ACT540M96G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74ACT540M96G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74ACT540M96G4?
CD74ACT540M96G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74ACT540M96G4 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 CD74ACT540M96G4?
For technical support, including CD74ACT540M96G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74ACT540M96G4 requirements.
6.How does Aetrix verify that CD74ACT540M96G4 is sourced from the original manufacturer or authorized distributors?
All CD74ACT540M96G4 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 CD74ACT540M96G4 meets industry standards.
7.What is the process for return or replacement of CD74ACT540M96G4?
All CD74ACT540M96G4 units undergo pre-shipment inspection (PSI). If there is an issue with CD74ACT540M96G4, 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 CD74ACT540M96G4 part is unused and in its original packaging.
Return procedure for CD74ACT540M96G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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