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Texas Instruments CD74AC540M96
- Part No.:
- CD74AC540M96
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CD74AC540M96.pdf
- Description:
- IC BUFF INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,388
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Product details
Overview
CD74AC540M96 from Texas Instruments is an octal inverting 3-state buffer/line driver with dual active-low output enables, designed for bus interface and data routing in industrial control and instrumentation systems. It operates from 1.5V to 5.5V, delivers ±24mA output drive, supports 50Ω transmission-line driving, and features balanced propagation delays (e.g., 6.2ns max at 5V, -55°C to +125°C).
For engineers reviewing the CD74AC540M96 datasheet, CD74AC540M96 pinout, CD74AC540M96 application, or CD74AC540M96 equivalent, key selection criteria include its AC-series voltage flexibility (1.5–5.5V), 3-state output control architecture, SOIC-20 package compatibility, and verified 50Ω line-drive capability across full temperature range.
Technical Context
The CD74AC540M96 implements RCA Advanced CMOS technology with SCR-latchup resistance. Its functional mode relies on two independent active-low output enable inputs (OE1, OE2) controlling eight inverting outputs simultaneously - all outputs enter high-impedance state when either enable is high.
It exhibits balanced AC-series timing: tPLH/tPHL propagation delays are matched within ±0.5ns at 5V, and switching characteristics (tPZL/tPLZ = 10.9ns max at 5V, -55°C to +125°C) ensure deterministic bus release and acquisition in synchronous digital systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5V to 5.5V - enables interoperability with 1.8V, 3.3V, and 5V logic families without level shifters |
| Output Drive Current | ±24mA per output - sufficient to directly drive 50Ω PCB traces or fan out to 15 FAST® ICs |
| Propagation Delay | 6.2ns max (tPHL, VCC=5V, TA=−55°C to +125°C) - supports >80MHz bus operation with margin |
| 3-State Enable/Disable Time | 10.9ns max (tPZL/tPLZ, VCC=5V, TA=−55°C to +125°C) - ensures clean bus arbitration in multi-driver systems |
| Input Threshold Voltage | VIH = 3.85V, VIL = 1.65V at VCC = 5.5V - provides 0.9V noise margin against TTL-compatible signals |
| Quiescent Supply Current | 160µA max (ICC, TA=−55°C to +125°C) - enables low-static-power operation in battery-backed or energy-sensitive designs |
| ESD Rating | ±2000V HBM - meets industrial handling requirements without additional protection circuitry |
Pinout & Package
CD74AC540M96 is housed in a 20-pin SOIC (DW) package measuring 12.8mm × 10.3mm (body: 12.8mm × 7.5mm), 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 input; forces all outputs low regardless of OE state |
| 2 (Q0) – 9 (Q7) | Inverting buffered outputs | Eight complementary outputs; each mirrors inverted Dn input when enabled |
| 3–4, 7–8, 13–14, 17–18 (D0–D7) | Data inputs | Eight independent TTL/CMOS-compatible inputs routed through inverting buffers |
| 10 (GND) | Ground reference | Primary return path for logic and output current; requires local 0.1µF bypass |
| 11 (CP) | Clock input | Rising-edge-triggered clock for synchronous operation; not used in basic buffer mode |
| 12 (Q4), 15–16 (Q5–Q6), 19 (Q7) | Additional outputs | Continuation of Q0–Q7 sequence; all eight outputs share identical electrical specs |
| 20 (VCC) | Power supply | Single-supply rail supporting 1.5–5.5V; must be decoupled near pin with 0.1µF capacitor |
Key Features
| Feature | Design Value |
|---|---|
| SCR-latchup-resistant process | Guarantees immunity to destructive latch-up under transient overvoltage or ESD stress in industrial environments |
| Balanced propagation delays | Ensures simultaneous assertion/release of all eight outputs - critical for glitch-free bus handoff |
| 1.5V to 5.5V wide supply range | Eliminates need for external voltage translators when interfacing mixed-voltage subsystems (e.g., 1.8V MCU to 5V peripheral bus) |
| ±24mA output drive | Directly drives terminated 50Ω transmission lines without external drivers - reduces BOM count and layout complexity |
| Two independent active-low OEs | Enables hierarchical bus control: one OE for coarse-grained device enable, second for fine-grained channel gating |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Isolating and buffering I/O expansion cards in modular programmable logic controllers with hot-swap capability. IC Role / Device Role / Timing Role: Inverting 3-state buffer managing bidirectional data flow between CPU backplane and field I/O modules. Use Value: ±24mA drive and 10.9ns disable time prevent bus contention during card insertion/removal while maintaining signal integrity over 20cm backplane traces. | Use Scenario: Driving multiplexed sensor/actuator lines in centralized body electronics units with shared CAN/LIN communication buses. IC Role / Device Role / Timing Role: Octal inverting buffer isolating microcontroller GPIOs from high-noise power-switching loads (e.g., door lock solenoids, mirror motors). Use Value: 1.5–5.5V operation matches automotive MCU core voltages; SCR-latchup resistance withstands load-dump transients up to ±60V. |
| Test Equipment Digital Pattern Generator | Medical Diagnostic Imaging Data Bus |
Use Scenario: Generating synchronized parallel stimulus patterns for ASIC validation using FPGA-controlled vector memory. IC Role / Device Role / Timing Role: High-speed octal buffer translating FPGA I/O bank outputs to 5V-tolerant test head interface. Use Value: 6.2ns max propagation delay enables >80MHz pattern rates; balanced tPLH/tPHL minimizes skew-induced timing violations. | Use Scenario: Buffering real-time pixel data streams between image sensor array and FPGA-based reconstruction engine in portable ultrasound devices. IC Role / Device Role / Timing Role: Low-noise 3-state driver conditioning 8-bit parallel video bus between analog front-end and digital processing unit. Use Value: 160µA max ICC extends battery life; 50Ω line-drive capability maintains signal fidelity across flex-cable interconnects without termination resistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AC540N | Same AC-series specs but in PDIP-20 package; higher RθJA (69°C/W vs. 101.2°C/W); no tape-and-reel option | Suitable for prototyping or low-volume through-hole assembly; lacks SOIC thermal performance for high-density PCBs | Select when manual soldering or breadboard evaluation is required; avoid for thermally constrained surface-mount production. |
| CD74ACT540M96 | TTL-compatible input thresholds (VIH=2.0V, VIL=0.8V); 5V-only supply (4.5–5.5V); faster 6.5ns propagation delay | Better suited for legacy 5V-only systems with TTL-level peripherals; incompatible with sub-4.5V logic domains | Choose only when interfacing exclusively with standard TTL or ACT-family devices; verify VCC stability before deployment. |
Compared with SN74AC540N and CD74ACT540M96, CD74AC540M96 uniquely combines wide-voltage operation (1.5–5.5V), SOIC-20 thermal efficiency, and production-ready tape-and-reel packaging - making it optimal for modern mixed-voltage embedded systems requiring long-term manufacturability.
Availability
CD74AC540M96 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, and medical imaging data buses requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for CD74AC540M96 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 connectivity technologies with over 90 years of innovation in industrial, automotive, and medical electronics.
The CD74AC540M96 belongs to TI's legacy Advanced CMOS logic family, engineered for robust bus interface applications demanding wide supply range, high noise immunity, and reliable 3-state control in harsh operating environments.
FAQ
What is the maximum operating temperature range for CD74AC540M96?
The CD74AC540M96 is rated for operation from −55°C to +125°C, validated across the full industrial/military temperature range. This specification is confirmed in Section 4.3 (Recommended Operating Conditions) and Section 6.1 (Detailed Description) of the TI datasheet SCHS285B. The SOIC-20 package's thermal resistance (RθJA = 101.2°C/W) supports reliable operation at maximum ambient temperature when properly heatsinked or airflow-cooled. CD74AC540M96 maintains all electrical specifications-including propagation delay and output drive-within this range.
Does CD74AC540M96 support 1.8V logic level translation?
Yes, CD74AC540M96 supports 1.8V operation as part of its 1.5V to 5.5V supply range. At VCC = 1.8V, VIH is guaranteed ≥1.2V and VIL ≤0.3V (Section 4.5), providing 0.6V noise margin for 1.8V CMOS interfaces. Input thresholds scale with VCC, ensuring compatibility with 1.8V microcontrollers and FPGAs without external level shifters. CD74AC540M96's ±24mA drive remains functional at 1.8V, though output voltage swing is limited to 0–1.8V.
How does the dual output enable (OE1/OE2) function in CD74AC540M96?
In CD74AC540M96, both OE1 and OE2 must be low to enable outputs; if either is high, all eight outputs enter high-impedance state. This OR logic allows flexible bus arbitration-e.g., OE1 controlled by system master, OE2 by local subsystem-ensuring no driver conflicts. Truth Table 6-1 confirms that Y = !A when OE1=OE2=L, and Y = Z (high-Z) otherwise. CD74AC540M96 implements this using internal NAND logic, verified in the functional block diagram (Figure 6-2).
Can CD74AC540M96 drive a 50Ω transmission line directly?
Yes, CD74AC540M96 is explicitly characterized for 50Ω transmission-line driving per Section 4.5 footnote (2): "Test verifies a minimum 50-ohm transmission-line-drive capability at +85°C, 75 ohms at +125°C." At VCC = 5.5V and IO = −24mA, VOL ≤ 0.5V ensures adequate low-state margin; VOH ≥ 3.85V at IO = −24mA guarantees robust high-state signaling. CD74AC540M96 achieves this without external series termination, reducing component count in high-speed digital interconnects.
What is the pin 1 orientation for CD74AC540M96 in tape-and-reel packaging?
CD74AC540M96 uses Quadrant Q1 pin 1 orientation in its 24.4mm-wide carrier tape (Package Materials Information, Page 1). The sprocket holes and cavity layout position pin 1 in the upper-left corner of each pocket when viewed from the component side (top view), consistent with JEDEC standard SOIC tape configuration. This orientation is confirmed in the Tape and Reel Information table where "Pin1 Quadrant" is listed as Q1 for CD74AC540M96. CD74AC540M96's marking "AC540M" appears adjacent to pin 1.
CD74AC540M96 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:
- 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
CD74AC540M96 FAQ
1.How can I place an order for CD74AC540M96 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74AC540M96 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 CD74AC540M96 reliable?
The price and inventory of CD74AC540M96 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74AC540M96 is usually 5 days.
3.What payment methods are accepted for CD74AC540M96?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74AC540M96 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74AC540M96?
CD74AC540M96 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74AC540M96 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 CD74AC540M96?
For technical support, including CD74AC540M96 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74AC540M96 requirements.
6.How does Aetrix verify that CD74AC540M96 is sourced from the original manufacturer or authorized distributors?
All CD74AC540M96 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 CD74AC540M96 meets industry standards.
7.What is the process for return or replacement of CD74AC540M96?
All CD74AC540M96 units undergo pre-shipment inspection (PSI). If there is an issue with CD74AC540M96, 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 CD74AC540M96 part is unused and in its original packaging.
Return procedure for CD74AC540M96:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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