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Texas Instruments CD74AC374M
- Part No.:
- CD74AC374M
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CD74AC374M.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:711
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Product details
Overview
CD74AC374M from Texas Instruments is an octal D-type positive-edge-triggered flip-flop with 3-state outputs, designed for bus-oriented data latching in industrial and embedded systems. It operates from 1.5 V to 5.5 V, delivers ±24 mA output drive per pin, supports up to 143 MHz clock frequency at 5 V, and features SCR-latch-up-resistant CMOS process technology.
For engineers reviewing the CD74AC374M datasheet, CD74AC374M pinout, CD74AC374M application, or CD74AC374M equivalent, key selection criteria include its 20-pin SOIC (DW) package, 3-state output enable control, balanced propagation delays, and compatibility with 50-Ω transmission line driving requirements.
Technical Context
The CD74AC374M implements eight independent D-type flip-flops synchronized on the rising edge of CLK, with a buffered OE input enabling high-impedance output states without affecting internal register operation. Its AC-series logic family ensures 1.5–5.5 V supply flexibility and 30% supply-level noise immunity.
Propagation delays are tightly balanced across all eight channels (e.g., 2.8 ns min / 10.8 ns max at 5 V), and switching characteristics are specified under controlled 50 pF load conditions with 3 ns rise/fall times. The device maintains full functionality over –55°C to +125°C ambient temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | Advanced CMOS (AC series), compatible with TTL input levels and offering bipolar-speed performance with CMOS power efficiency |
| Supply Voltage Range | 1.5 V to 5.5 V - enables direct interfacing with 1.8 V, 3.3 V, and 5 V logic domains without level shifters |
| Max Clock Frequency | 143 MHz at 5 V - supports high-speed data capture in real-time control and instrumentation applications |
| Output Drive | ±24 mA per output - sufficient to directly drive 15 FAST ICs or terminate 50 Ω transmission lines |
| Propagation Delay | 2.8–10.8 ns (5 V) - low skew ensures deterministic timing across all eight outputs |
| Operating Temperature | –55°C to +125°C - qualified for extended industrial and military-grade environments |
| ESD Rating | ±2000 V HBM - robust handling in automated assembly and field-deployed systems |
Pinout & Package
CD74AC374M is housed in a 20-pin SOIC (DW) package measuring 12.80 mm × 10.3 mm (including pins), with body dimensions of 12.80 mm × 7.50 mm. The package is RoHS-compliant, moisture sensitivity level 1, and rated for reflow up to 260°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE (Pin 1) | Output Enable control input | Active-low signal that places all Q outputs in high-impedance state without disrupting internal register contents |
| CLK (Pin 11) | Clock input | Positive-edge-triggered synchronous control - data latched only on rising transition |
| D1–D8 (Pins 3,4,7,8,13,14,17,18) | Data inputs | Eight independent asynchronous inputs feeding respective flip-flop stages |
| Q1–Q8 (Pins 2,5,6,9,12,15,16,19) | 3-state outputs | Non-inverted registered outputs; each capable of sourcing/sinking ±24 mA when enabled |
| VCC (Pin 20) | Power supply | Single-supply rail supporting 1.5–5.5 V operation; requires local 0.1 µF bypass capacitor |
| GND (Pin 10) | Ground reference | Common return path for all logic and output current; critical for noise suppression and timing integrity |
Key Features
| Feature | Design Value |
|---|---|
| SCR-latch-up resistance | Guaranteed immunity to latch-up events under transient overvoltage or ESD stress, enhancing system reliability in noisy environments |
| Balanced propagation delays | Sub-nanosecond skew between outputs ensures simultaneous data availability - essential for parallel bus integrity |
| 3-state output control | OE pin allows dynamic bus sharing without external tri-state buffers or pull-up resistors |
| 50-Ω transmission line drive | Validated capability to drive 50 Ω loads at +85°C - eliminates need for external termination in high-speed digital interconnects |
| Wide voltage operation | 1.5–5.5 V supply range supports mixed-voltage system integration and legacy 5 V interface compatibility |
Applications
| Industrial PLC I/O Expansion | Automotive Body Control Module |
|---|---|
Use Scenario: Latching sensor status and actuator commands across multi-channel CAN/LIN gateway interfaces. IC Role / Device Role / Timing Role: Synchronizes asynchronous input signals from switches, relays, and analog-to-digital converters into a coherent parallel data word aligned to system clock domain. Use Value: Enables deterministic sampling of 8-bit status registers with <11 ns setup/hold margin at 100 MHz, reducing firmware polling overhead. | Use Scenario: Buffering microcontroller GPIOs to drive high-current loads like door locks, mirror controls, and lighting modules. IC Role / Device Role / Timing Role: Provides isolated, high-drive 3-state output staging between MCU and external power drivers, preventing bus contention during mode transitions. Use Value: Delivers ±24 mA per channel to directly drive optocouplers and small solenoids without discrete transistors or driver ICs. |
| Test Equipment Digital Pattern Generator | Medical Imaging Data Acquisition |
Use Scenario: Generating precise, synchronized stimulus waveforms for IC functional testing and boundary-scan validation. IC Role / Device Role / Timing Role: Acts as a programmable parallel output register, updating all 8 bits simultaneously on clock edge for glitch-free pattern generation. Use Value: Achieves <2.8 ns min propagation delay and <0.5 ns output skew - critical for sub-10 ns timing resolution in ATE systems. | Use Scenario: Capturing parallel ADC outputs from multi-channel ultrasound or MRI front-end ASICs before serialization. IC Role / Device Role / Timing Role: Temporarily stores digitized sample words from analog signal chain, synchronizing burst-mode acquisition to host processor DMA cycles. Use Value: Supports –55°C to +125°C operation and ±2000 V HBM ESD rating - meets IEC 60601-1 environmental and safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type 3-state flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD74ACT374M96.A | TTL-compatible input thresholds (VIH = 2.0 V min), higher drive (±24 mA), but narrower 4.5–5.5 V supply range | Preferred where strict 5 V-only systems require guaranteed TTL-level interoperability and faster 125 MHz max clock | Select when interfacing exclusively with legacy 5 V TTL logic and maximum speed at 5 V is prioritized over voltage flexibility |
| SN74AC374N | Same AC logic family and electrical specs, but in 20-pin PDIP (N) package with larger 24.33 mm × 9.4 mm footprint | Suitable for prototyping, through-hole assembly, or legacy board designs requiring socketed components | Choose for hand-soldered development boards or industrial controllers using through-hole manufacturing processes |
Compared with CD74ACT374M96.A and SN74AC374N, the CD74AC374M offers broader supply voltage support (1.5–5.5 V) in a space-saving SOIC package, making it optimal for modern mixed-voltage embedded systems where layout density and power domain flexibility are critical.
Availability
CD74AC374M is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, test equipment digital pattern generation, and medical imaging data acquisition requiring stable component supply across extended temperature ranges.
Supply support for CD74AC374M 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 CD74AC374M belongs to TI's Advanced CMOS (AC) logic family, engineered for high-speed, low-power bus interface and data latching in harsh-environment applications demanding wide voltage operation and robust ESD tolerance.
FAQ
What is the operating voltage range for the CD74AC374M?
The CD74AC374M operates from 1.5 V to 5.5 V across its full temperature range of –55°C to +125°C. This wide supply range allows direct integration with 1.8 V, 3.3 V, and 5 V logic domains without level-shifting circuitry, and is explicitly validated in Section 4.3 of the TI SCHS290A datasheet.
Does the CD74AC374M support 3-state output control, and how is it implemented?
Yes, the CD74AC374M provides 3-state output control via the active-low OE (Output Enable) pin (Pin 1). When OE is high, all eight Q outputs enter high-impedance state regardless of clock or data activity - preserving internal register values while isolating the device from the bus. This function is detailed in Section 6.1 and Table 6-1 of the datasheet.
What is the maximum clock frequency supported by the CD74AC374M at 3.3 V and 5 V?
At 5 V supply, the CD74AC374M supports up to 143 MHz maximum clock frequency (min value at 4.5 V); at 3.3 V, it supports up to 101 MHz (min value at 3.6 V). These values are specified in Table 4-7 (Prerequisite for Switching: AC Series) of the TI SCHS290A datasheet under recommended operating conditions.
Is the CD74AC374M pin-compatible with other members of the CDx4AC/ACT374 family?
Yes, the CD74AC374M shares identical pin configuration and function mapping with CD74ACT374M96.A, CD74AC534M96.A, and SN74AC374N, as confirmed in Figure 3-1 and Table 3-1 of the TI SCHS290A datasheet. However, note that CD74AC534 has inverted outputs, while CD74AC374M provides non-inverted Q outputs.
What package type and thermal characteristics does the CD74AC374M use?
The CD74AC374M uses a 20-pin SOIC (DW) package with junction-to-ambient thermal resistance (RθJA) of 101.2°C/W, as specified in Section 4.4 of the TI SCHS290A datasheet. It is RoHS-compliant, moisture sensitivity level 1, and rated for peak reflow at 260°C - suitable for standard surface-mount assembly processes.
CD74AC374M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AC
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 125 MHz
- Max Propagation Delay @ V, Max CL:
- 10.8ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.5V ~ 5.5V
- Current - Quiescent (Iq):
- 8 µA
- Input Capacitance:
- 10 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
CD74AC374M FAQ
1.How can I place an order for CD74AC374M through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74AC374M 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 CD74AC374M reliable?
The price and inventory of CD74AC374M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74AC374M is usually 5 days.
3.What payment methods are accepted for CD74AC374M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74AC374M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74AC374M?
CD74AC374M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74AC374M 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 CD74AC374M?
For technical support, including CD74AC374M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74AC374M requirements.
6.How does Aetrix verify that CD74AC374M is sourced from the original manufacturer or authorized distributors?
All CD74AC374M 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 CD74AC374M meets industry standards.
7.What is the process for return or replacement of CD74AC374M?
All CD74AC374M units undergo pre-shipment inspection (PSI). If there is an issue with CD74AC374M, 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 CD74AC374M part is unused and in its original packaging.
Return procedure for CD74AC374M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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