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Texas Instruments CD74HCT574QM96G4Q1
- Part No.:
- CD74HCT574QM96G4Q1
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CD74HCT574QM96G4Q1.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:50,000
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Product details
Overview
CD74HCT574QM96G4Q1 from Texas Instruments is an automotive-qualified octal D-type flip-flop with 3-state outputs, 20-pin SOIC (DW) package, VCC = 4.5–5.5 V operation, tpd = 15 ns (5 V, CL = 15 pF), and fanout of 15 LSTTL loads. It serves as a data latch and bus interface in engine control units, body electronics, and ADAS sensor data acquisition systems.
For engineers reviewing the CD74HCT574QM96G4Q1 datasheet, CD74HCT574QM96G4Q1 pinout, CD74HCT574QM96G4Q1 application, or CD74HCT574QM96G4Q1 equivalent, key selection criteria include automotive temperature range (−40°C to 125°C), 3-state output enable independence from clock, LSTTL/CMOS input compatibility, and bus-line driving capability for noise-resilient digital subsystems.
Technical Context
This device implements eight edge-triggered D flip-flops synchronized on the low-to-high clock transition (CP↑), with asynchronous 3-state output control via OE. All inputs are CMOS-compatible with VIH ≥ 2 V and VIL ≤ 0.8 V at VCC = 4.5–5.5 V.
Its output structure supports high-impedance tri-state operation independent of register state, enabling bidirectional bus sharing without contention. Propagation delay balance (tPLH ≈ tPHL) and matched transition times ensure clean timing margins in synchronous digital interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures stable operation across automotive battery voltage fluctuations including cold-crank (≥4.5 V) and load-dump transients (≤5.5 V). |
| Propagation Delay (tpd) | 15 ns at 5 V, CL = 15 pF - Enables reliable sampling at up to 30 MHz clock frequency in real-time control loops. |
| Output Drive | 15 LSTTL loads - Sufficient to drive multiple downstream logic devices or long PCB traces without external buffers. |
| Operating Temperature | −40°C to 125°C - Qualified per AEC-Q100 for under-hood and powertrain applications requiring extended thermal robustness. |
| Input Compatibility | LSTTL and CMOS - Accepts standard 5 V logic levels (VIH ≥ 2 V, VIL ≤ 0.8 V) and draws <1 µA input current, minimizing loading on upstream drivers. |
| 3-State Enable | OE active-low, independent of CP - Allows dynamic bus arbitration without disrupting internal register state or requiring clock gating. |
| Power Dissipation | Cpd = 47 pF - Enables accurate dynamic power estimation (PD = Cpd × VCC² × fI + ΣCL × VCC² × fO) for thermal design in sealed ECUs. |
Pinout & Package
CD74HCT574QM96G4Q1 uses a 20-pin SOIC package (JEDEC MS-013, TI drawing DW), 7.6 mm × 12.8 mm body, 2.65 mm max height, gull-wing leads, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE (Output Enable) | Active-low 3-state control; high = outputs in high-Z, decoupled from bus regardless of register content or clock activity. |
| 2–9 | D0–D7 (Data Inputs) | Asynchronous parallel data inputs; latched on rising CP edge; CMOS/LSTTL compatible voltage thresholds. |
| 10 | GND | Ground reference for all I/O and internal logic; must be low-impedance connection to minimize switching noise coupling. |
| 11 | VCC | Positive supply rail (4.5–5.5 V); requires local 100 nF ceramic bypass capacitor near pin for transient current delivery. |
| 12–19 | Q0–Q7 (Outputs) | Tri-state buffered outputs; driven only when OE = low; capable of sourcing/sinking ±25 mA per pin. |
| 20 | CP (Clock) | Rising-edge triggered clock input; setup time tsu = 12 ns (min), hold time th = 5 ns (min) at 4.5 V. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (−40°C to 125°C) - Validated for use in safety-critical vehicle subsystems including powertrain and chassis control. |
| Bus-line driving capability | 15 LSTTL loads - Eliminates need for external line drivers in multi-node CAN/LIN gateway or sensor hub designs. |
| Balanced propagation delay | tPLH ≈ tPHL - Reduces skew between parallel data bits, critical for maintaining setup/hold timing in high-speed parallel interfaces. |
| Significant power reduction vs LSTTL | ICC = 8–160 µA (quiescent) - Low static current enables always-on monitoring circuits in battery-sensitive modules like door modules or seat controllers. |
| Buffered inputs | Input unit loads: Dn = 0.4, CP = 0.75, OE = 0.6 - Minimizes capacitive loading on upstream drivers, preserving signal integrity in dense logic arrays. |
Applications
| Engine Control Unit (ECU) Data Capture | Body Control Module (BCM) I/O Expansion |
|---|---|
|
Use Scenario: Capturing synchronized sensor readings (e.g., crankshaft position, camshaft timing) before transmission to MCU via parallel bus. IC Role / Device Role / Timing Role: Octal D flip-flop acting as a synchronous input latch; samples analog-to-digital converter outputs on rising CP edge with precise timing alignment. Use Value: Guarantees deterministic sampling window (tsu = 12 ns, th = 5 ns) and eliminates metastability risk during high-vibration engine operation. |
Use Scenario: Expanding GPIO count for switch matrix scanning and LED driver control in centralized body electronics. IC Role / Device Role / Timing Role: Bus-interface latch providing isolated, 3-state-controlled output staging to prevent contention across shared LED/analog driver lines. Use Value: Enables dynamic reconfiguration of output routing via OE control without clock interruption-critical for fault-tolerant lighting sequences. |
| ADAS Sensor Interface Hub | Infotainment System Audio Routing |
|
Use Scenario: Aggregating parallel data streams from multiple radar pre-processing ICs before serial conversion for SoC ingestion. IC Role / Device Role / Timing Role: High-drive-capability data buffer isolating sensor-side timing domains from SoC-side clock domains using OE-gated handshaking. Use Value: 15-LSTTL drive strength sustains signal integrity over 10+ cm PCB traces between radar modules and central processor board. |
Use Scenario: Managing audio channel select lines and mute controls across multiple amplifier ICs in premium sound systems. IC Role / Device Role / Timing Role: Level-shifting and fanout buffer converting low-current MCU GPIO signals into robust, noise-immune control lines for Class-D amplifiers. Use Value: CMOS-compatible inputs and low ICC reduce MCU I/O loading, while 3-state outputs allow safe hot-swap configuration changes during system runtime. |
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 |
|---|---|---|---|
| SN74HCT574QPWRQ1 | TSSOP-20 (PW) package, same electrical specs, θJA = 69°C/W vs 58°C/W for SOIC. | Better PCB space efficiency but lower thermal performance; suited for compact infotainment modules with forced-air cooling. | Select when board area is constrained and thermal margin >15°C exists at max ambient. |
| CD74ACT574M96E4 | ACT family: VCC = 4.5–5.5 V, but VIH = 3.5 V min, VOL = 0.5 V max, tpd = 9 ns typ - higher speed, stricter input thresholds. | Not automotive-qualified; lacks AEC-Q100 certification - limited to non-safety-critical cabin electronics. | Choose only for cost-sensitive consumer-grade applications where −40°C to 125°C operation is not required. |
Compared with SN74HCT574QPWRQ1, CD74HCT574QM96G4Q1 offers superior thermal dissipation in SOIC for under-hood placement; versus CD74ACT574M96E4, it provides guaranteed automotive qualification and relaxed input voltage thresholds for legacy 5 V microcontroller interfacing.
Availability
CD74HCT574QM96G4Q1 is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS sensor interface hubs requiring stable component supply across automotive production lifecycles.
Supply support for CD74HCT574QM96G4Q1 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 automotive electronics, with decades of automotive qualification expertise and broad AEC-Q100 portfolio coverage.
The CD74HCT574QM96G4Q1 belongs to TI's HCT logic family designed specifically for drop-in replacement of legacy TTL in automotive and industrial systems, emphasizing robustness, wide temperature operation, and mixed-signal interface compatibility.
FAQ
What is the maximum clock frequency supported by CD74HCT574QM96G4Q1?
The CD74HCT574QM96G4Q1 supports a maximum clock frequency of 30 MHz at TA = 25°C and VCC = 4.5 V, decreasing to 20 MHz across the full −40°C to 125°C operating range. This specification is verified under CL = 15 pF load conditions and accounts for worst-case process, voltage, and temperature variations defined in the recommended operating conditions table.
Does CD74HCT574QM96G4Q1 require external pull-up or pull-down resistors on unused inputs?
Yes - all unused inputs of CD74HCT574QM96G4Q1 must be held at a valid logic level (VCC or GND) to prevent floating nodes that could cause excessive current draw or erratic behavior. TI's application report SCBA004 explicitly mandates this practice for CMOS-based HCT devices to ensure proper device operation and avoid potential latch-up or increased power consumption.
Is CD74HCT574QM96G4Q1 pin-compatible with standard CD74HCT574 variants?
Yes - CD74HCT574QM96G4Q1 shares identical pinout, function, and timing characteristics with non-automotive CD74HCT574 variants in the same SOIC-20 (DW) package. The "Q1" suffix denotes AEC-Q100 qualification, but mechanical and electrical interface compatibility is preserved for direct substitution in existing layouts.
What is the meaning of "G4" in CD74HCT574QM96G4Q1?
The "G4" in CD74HCT574QM96G4Q1 indicates Green (RoHS-compliant, halogen-free) packaging per JS709B, with NiPdAu lead finish and no antimony or bromine-based flame retardants. This designation confirms compliance with automotive environmental standards including ELV and IMDS reporting requirements for material content disclosure.
Can CD74HCT574QM96G4Q1 drive a 50-pF load with guaranteed timing?
Yes - CD74HCT574QM96G4Q1 specifies tpd = 33–50 ns and tdis/ten = 28–45 ns under CL = 50 pF test conditions at VCC = 4.5 V. These values are characterized across the full temperature range and included in the official switching characteristics table, confirming reliable operation with heavier capacitive loads typical of backplane or multi-drop bus implementations.
CD74HCT574QM96G4Q1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- 33ns @ 4.5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 6mA, 6mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 8 µA
- Input Capacitance:
- 10 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
CD74HCT574QM96G4Q1 FAQ
1.How can I place an order for CD74HCT574QM96G4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HCT574QM96G4Q1 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 CD74HCT574QM96G4Q1 reliable?
The price and inventory of CD74HCT574QM96G4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HCT574QM96G4Q1 is usually 5 days.
3.What payment methods are accepted for CD74HCT574QM96G4Q1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HCT574QM96G4Q1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HCT574QM96G4Q1?
CD74HCT574QM96G4Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HCT574QM96G4Q1 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 CD74HCT574QM96G4Q1?
For technical support, including CD74HCT574QM96G4Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HCT574QM96G4Q1 requirements.
6.How does Aetrix verify that CD74HCT574QM96G4Q1 is sourced from the original manufacturer or authorized distributors?
All CD74HCT574QM96G4Q1 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 CD74HCT574QM96G4Q1 meets industry standards.
7.What is the process for return or replacement of CD74HCT574QM96G4Q1?
All CD74HCT574QM96G4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with CD74HCT574QM96G4Q1, 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 CD74HCT574QM96G4Q1 part is unused and in its original packaging.
Return procedure for CD74HCT574QM96G4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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