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Texas Instruments CD74HC574M96G4
- Part No.:
- CD74HC574M96G4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CD74HC574M96G4.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,273
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Product details
Overview
CD74HC574M96G4 from Texas Instruments is an octal D-type flip-flop with 3-state outputs, positive-edge clock triggering, and bus-driving capability (15 LSTTL loads). It operates from 2 V to 6 V, features 15 ns typical propagation delay at 5 V/15 pF, and supports –55°C to +125°C industrial/military temperature range. It serves as a data latch and bus interface in microcontroller peripheral expansion and digital control systems.
For engineers reviewing the CD74HC574M96G4 datasheet, CD74HC574M96G4 pinout, CD74HC574M96G4 application, or CD74HC574M96G4 equivalent, key selection criteria include 3-state output enable independence, edge-triggered register behavior, wide supply voltage tolerance, high-impedance output timing (tPLZ/tPZL), and SOIC-20 thermal performance under extended temperature operation.
Technical Context
The CD74HC574M96G4 implements eight independent D-type latches synchronized to the rising edge of the clock (CP) input. Its output enable (OE) signal operates asynchronously to place all Q outputs in high-impedance state regardless of clock or data state - enabling shared-bus arbitration without timing dependency on register updates.
This device belongs to the HC logic family and exhibits CMOS input characteristics (II ≤ 1 μA), rail-to-rail output swing, and balanced tPLH/tPHL propagation delays. It is functionally identical to the CD74HC374 but uses a different pinout optimized for PCB layout compatibility with legacy 74LS574 footprints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | High-speed CMOS (HC), not TTL-compatible - requires 2–6 V supply and delivers CMOS-level VIH/VIL thresholds |
| Propagation Delay (tPD) | 15 ns typical at VCC = 5 V, CL = 15 pF - enables reliable operation up to 60 MHz clock rate in low-capacitance buses |
| Output Drive | 15 LSTTL loads - sufficient to drive standard 5-V TTL inputs without external buffers in mixed-logic systems |
| Operating Temperature | –55°C to +125°C - qualified for military, aerospace, and harsh-environment industrial control applications |
| Supply Voltage Range | 2 V to 6 V - supports battery-backed, low-voltage, and dual-rail system integration without level shifters |
| Three-State Enable Timing | tPLZ = 23 ns, tPZL = 26 ns (VCC = 6 V, CL = 50 pF) - defines minimum bus release/setup windows during OE transitions |
| Input Leakage Current | ±0.1 μA max at VCC = 6 V - ensures minimal power draw and stable logic levels in high-impedance or floating-input scenarios |
Pinout & Package
CD74HC574M96G4 is housed in a 20-pin SOIC (DW) package measuring 12.80 mm × 7.50 mm, with standard 0.050″ (1.27 mm) lead pitch and RoHS-compliant NiPdAu lead finish. It is rated MSL Level-1 with unlimited floor life at ≤30°C/60% RH.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CP) | Clock Input | Positive-edge-triggered register load control - data on D0–D7 captured only on LOW→HIGH transition |
| 2–9 (D0–D7) | Data Inputs | Asynchronous parallel data inputs - no internal pull-ups; must be driven or tied to valid logic level |
| 10 (GND) | Ground Reference | Common return path for all signals and power - requires low-inductance connection to minimize switching noise |
| 11–18 (Q0–Q7) | 3-State Outputs | Register-stored outputs enabled/disabled by OE - high-impedance when OE = HIGH, active-drive when OE = LOW |
| 19 (OE) | Output Enable | Active-low asynchronous control - overrides clock/data state to force all Q outputs into high-Z mode |
| 20 (VCC) | Power Supply | Primary CMOS supply rail - requires local 0.1-μF ceramic bypass capacitor placed within 5 mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| Independent 3-state control | OE pin disables outputs without affecting internal register state - enables multi-drop bus sharing without data corruption |
| Wide voltage operation | 2–6 V supply range allows direct interfacing with 3.3 V microcontrollers and 5 V legacy peripherals without level translation |
| Low dynamic power | CPD = 39 pF at 5 V - reduces switching current and heat generation in high-frequency data capture applications |
| High noise immunity | NIH/NIL = 30% of VCC at 5 V - rejects >1.5 V of common-mode noise on data/clock lines in electrically noisy environments |
| Industrial temperature grade | –55°C to +125°C operation - validated for use in motor drives, avionics, and downhole instrumentation without derating |
Applications
| Microcontroller I/O Expansion | Digital Signal Routing |
|---|---|
Use Scenario: Expanding GPIO count of an ARM Cortex-M0+ MCU to drive 8-bit LED arrays and push-button inputs in a compact industrial HMI. IC Role / Device Role / Timing Role: Acts as an edge-triggered input latch and output buffer - captures parallel sensor data on clock edge and presents it via 3-state outputs to MCU data bus. Use Value: Eliminates need for discrete bus transceivers; enables synchronous sampling with deterministic setup/hold timing (tSU = 10 ns, tH = 5 ns at 6 V). | Use Scenario: Isolating and routing digital control signals between FPGA fabric and analog front-end ICs in a medical imaging subsystem. IC Role / Device Role / Timing Role: Provides glitch-free signal staging and bus contention prevention using asynchronous OE control during FPGA reconfiguration cycles. Use Value: Prevents metastability and bus conflicts during hot-swap events - high-impedance outputs ensure zero DC loading on shared lines during OE assertion. |
| Test Equipment Data Capture | Automated Industrial Control |
Use Scenario: Capturing parallel status bits from 8-channel relay modules in automated test equipment with precise timestamp alignment. IC Role / Device Role / Timing Role: Serves as a synchronized snapshot latch - freezes real-time I/O states at exact clock edges for correlation with oscilloscope triggers. Use Value: Achieves sub-20 ns timing resolution across all channels due to matched propagation delays (tPLH/tPHL ≤ 5 ns skew at 5 V). | Use Scenario: Interfacing PLC backplane signals to isolated digital I/O cards operating across –40°C to +85°C ambient conditions. IC Role / Device Role / Timing Role: Functions as a robust level-shifting interface - accepts 2.5–5.5 V logic from field sensors and drives 5 V actuator control lines. Use Value: Maintains full functionality over full industrial temperature range without external biasing or heating - validated per MIL-PRF-38535 screening. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC574N | Same HC logic family, identical electrical specs, but in PDIP-20 package (25.4 mm × 6.35 mm) - higher thermal resistance (RθJA = 84.6°C/W vs. 109.1°C/W for SOIC) | Preferred for prototyping and through-hole assembly; unsuitable for high-density or thermally constrained PCBs | Select when manual soldering, breadboarding, or legacy board compatibility is required - avoid in surface-mount production with >50 mW average power dissipation |
| CD74HCT574M96 | HCT variant: TTL-compatible inputs (VIH = 2 V min, VIL = 0.8 V max), same SOIC-20 package and pinout - higher ICC (160 μA max vs. 80 μA for HC) | Required when interfacing directly with 5 V TTL outputs (e.g., 74LS series) without level shifters | Choose only if driving from legacy TTL sources; otherwise HC version offers lower power and wider supply margin |
Compared with SN74HC574N and CD74HCT574M96, CD74HC574M96G4 provides optimal balance of low-power CMOS operation, SOIC-20 manufacturability, and extended temperature resilience - making it preferred for volume production in space-constrained, high-reliability embedded systems.
Availability
CD74HC574M96G4 is available at Aetrix Electronics and suitable for microcontroller I/O expansion, digital test equipment, industrial PLC interfaces, and aerospace data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74HC574M96G4 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 company delivering analog and embedded processing solutions, with leadership in high-reliability logic, precision analog, and automotive-grade ICs.
The CD74HC574M96G4 belongs to TI's industry-standard HC logic portfolio, designed specifically for robust, low-power data latching and bus isolation in mission-critical industrial, defense, and instrumentation applications.
FAQ
What is the maximum clock frequency supported by CD74HC574M96G4?
The CD74HC574M96G4 supports a maximum clock frequency of 60 MHz when loaded with CL = 15 pF at VCC = 5 V. At VCC = 6 V, fMAX drops to 23 MHz under –55°C to +125°C conditions per datasheet Section 5.5. This rating assumes clean clock edges with tr/tf ≤ 400 ns and proper decoupling.
Does CD74HC574M96G4 have built-in ESD protection?
Yes, CD74HC574M96G4 includes standard CMOS gate oxide ESD protection structures rated per JEDEC JS-001 Class 2 (≥2 kV HBM). However, TI recommends handling with grounded wrist straps and anti-static mats - the device remains susceptible to damage from improper handling despite integrated protection.
Can CD74HC574M96G4 operate reliably at 2.5 V supply?
Yes, CD74HC574M96G4 is fully specified down to 2 V supply and operates reliably at 2.5 V. At this voltage, tPD increases to ~250 ns (CL = 50 pF), fMAX falls to 4 MHz, and VIH/VIL thresholds scale proportionally (VIH = 1.75 V min, VIL = 0.75 V max), maintaining functional integrity in low-voltage embedded systems.
Is CD74HC574M96G4 pin-compatible with 74LS574?
No, CD74HC574M96G4 is not pin-compatible with 74LS574. While both are 20-pin octal D flip-flops with 3-state outputs, the CD74HC574 uses a different pinout than the LS574 (e.g., OE is pin 19 in HC574 but pin 1 in LS574). Always verify against TI's Pin Configuration diagram (SCHS183E, page 3) before PCB layout.
What is the purpose of the "G4" suffix in CD74HC574M96G4?
The "G4" suffix in CD74HC574M96G4 indicates TI's green packaging standard: lead-free (Pb-free), RoHS-compliant, and halogen-free construction. It denotes compliance with IPC/JEDEC J-STD-609A Class 3 moisture sensitivity and TI's enhanced environmental material specifications - not a functional or parametric variant.
CD74HC574M96G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 60 MHz
- Max Propagation Delay @ V, Max CL:
- 28ns @ 6V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- 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
CD74HC574M96G4 FAQ
1.How can I place an order for CD74HC574M96G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HC574M96G4 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 CD74HC574M96G4 reliable?
The price and inventory of CD74HC574M96G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HC574M96G4 is usually 5 days.
3.What payment methods are accepted for CD74HC574M96G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HC574M96G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HC574M96G4?
CD74HC574M96G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HC574M96G4 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 CD74HC574M96G4?
For technical support, including CD74HC574M96G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HC574M96G4 requirements.
6.How does Aetrix verify that CD74HC574M96G4 is sourced from the original manufacturer or authorized distributors?
All CD74HC574M96G4 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 CD74HC574M96G4 meets industry standards.
7.What is the process for return or replacement of CD74HC574M96G4?
All CD74HC574M96G4 units undergo pre-shipment inspection (PSI). If there is an issue with CD74HC574M96G4, 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 CD74HC574M96G4 part is unused and in its original packaging.
Return procedure for CD74HC574M96G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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