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Texas Instruments SN74AHCT374PW
- Part No.:
- SN74AHCT374PW
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AHCT374PW.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:646
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Product details
Overview
SN74AHCT374PW from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for parallel data synchronization and bus interfacing in 5V digital systems. It operates from 4.5V to 5.5V, delivers 10.5ns propagation delay at 5V/15pF, supports up to 80MHz clock frequency, and features TTL-compatible inputs and latch-up immunity exceeding 250mA per JESD17.
For engineers reviewing the SN74AHCT374PW datasheet, SN74AHCT374PW pinout, SN74AHCT374PW application, or SN74AHCT374PW equivalent, this device is selected for high-drive 3-state bus buffering, synchronous data latching in industrial control I/O modules, and level-translating register stages where input tolerance to 5.5V and robust noise immunity are required.
Technical Context
The SN74AHCT374PW implements eight independent D-type flip-flops sharing a single rising-edge-triggered CLK and active-low OE control. Its flow-through pinout minimizes trace crossovers on dense PCBs, and its balanced CMOS 3-state outputs source/sink up to ±25mA while maintaining defined VOH (≥3.8V) and VOL (≤0.44V) under load.
All inputs are TTL-compatible with VIH(min) = 2.0V and VIL(max) = 0.8V at VCC = 4.5–5.5V, enabling direct interfacing with legacy 5V TTL logic. The device retains state during OE assertion and exhibits 27pF typical power dissipation capacitance, supporting low-noise operation in mixed-signal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5V to 5.5V - Ensures compatibility with standard 5V logic rails and tolerates supply ripple without functional degradation. |
| Propagation Delay (tPLH/tPHL) | 10.5ns max at VCC = 5V, CL = 15pF - Enables reliable operation in 80MHz synchronous buses with timing margin. |
| Max Clock Frequency (fmax) | 80MHz at CL = 15pF - Supports high-speed data capture in real-time control and instrumentation interfaces. |
| Output Drive (IOL/IOH) | ±25mA continuous - Drives multiple 74-series loads or moderate capacitive buses without external buffers. |
| Input Compatibility | TTL-compatible - Interfaces directly with 74LS, 74F, and other 5V TTL families without level-shifting circuitry. |
| Latch-up Immunity | >250mA per JESD17 - Provides robustness against transient current faults in industrial environments. |
| Power Dissipation Capacitance (Cpd) | 27pF typical - Enables accurate dynamic power estimation for thermal design in embedded systems. |
Pinout & Package
TSSOP-20 (PW) package: 6.5mm × 6.4mm body, 0.65mm pitch, thermally enhanced with exposed pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-low output enable | Asserting low enables all eight Q outputs; high places them in high-impedance state for bus sharing. |
| 2 (1Q) – 9 (4Q), 12 (5Q) – 13 (5D), 14 (6D) – 19 (8Q) | Channel I/O pairs | Flow-through arrangement (D1–Q1, D2–Q2, ..., D8–Q8) simplifies PCB routing and reduces signal skew. |
| 10 (CLK) | Rising-edge clock input | Samples all eight D inputs simultaneously on CLK↑; no internal clock distribution skew. |
| 11 (GND) | Ground reference | Primary return path for all I/O and supply currents; must be low-impedance for noise control. |
| 20 (VCC) | Positive supply | Supplies core logic and output drivers; requires local 0.1µF bypass capacitor per TI layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| 3-State Output Architecture | True high-impedance state (Z) with leakage ≤±2.5µA - Enables multi-drop bus designs without contention or pull-up resistors. |
| TTL-Compatible Inputs | VIH(min) = 2.0V, VIL(max) = 0.8V at VCC = 4.5–5.5V - Eliminates need for external level shifters when interfacing with legacy TTL systems. |
| High-Drive Capability | ±25mA output current - Drives 10+ 74AHCT inputs or 50pF capacitive loads while maintaining VOL ≤0.44V and VOH ≥3.8V. |
| Flow-Through Pinout | D and Q pins aligned on opposite sides of package - Reduces layer count and via usage in high-density routing for compact industrial PCBs. |
| Robust ESD Protection | ±2000V HBM, ±1000V CDM - Meets industrial handling requirements without additional protection circuitry. |
Applications
| Industrial PLC I/O Modules | Test Equipment Data Acquisition |
|---|---|
Use Scenario: Capturing parallel sensor data from analog-to-digital converters before transmission over backplane buses. IC Role / Device Role / Timing Role: Synchronous data latch holding sampled values stable during bus arbitration cycles. Use Value: 10.5ns delay and 80MHz support ensure sub-microsecond sampling alignment across eight channels. |
Use Scenario: Buffering pattern generator outputs to drive multiple DUT interface lines simultaneously. IC Role / Device Role / Timing Role: Octal register providing glitch-free, edge-aligned stimulus signals to device-under-test inputs. Use Value: TTL-compatible inputs accept direct connection to legacy pattern generators; 3-state outputs allow shared test bus reconfiguration. |
| Automotive Body Control Units | Communications Backplane Interfaces |
Use Scenario: Isolating microcontroller GPIOs from high-current lamp drivers and relay coils. IC Role / Device Role / Timing Role: Level-shifting and current-boosting interface between 3.3V MCU and 5V automotive peripherals. Use Value: 5.5V-tolerant inputs accept MCU GPIOs directly; ±25mA drive handles lamp sink currents without external transistors. |
Use Scenario: Interfacing FPGA-based packet processors with legacy 5V parallel control buses. IC Role / Device Role / Timing Role: Synchronized register stage aligning burst-mode data transfers between clock domains. Use Value: Flow-through pinout minimizes trace length mismatch; 27pF Cpd enables predictable timing closure in high-speed backplanes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT374PW | Slower tPLH/tPHL (19ns max), lower fmax (60MHz), identical pinout and voltage specs. | Lower-speed control logic where timing margin is relaxed; reduced dynamic power consumption. | Select when system clock ≤60MHz and lower ICC (20µA vs 40µA) is prioritized over speed. |
| 74LVC374APW | 3.3V-only supply (1.65–3.6V), 5V-tolerant inputs, faster tPLH (6.2ns), smaller TSSOP-20 footprint (4.4 × 6.5mm). | Modern low-voltage systems requiring 3.3V core logic with 5V signal compatibility. | Select for new 3.3V designs needing higher speed and lower power; not drop-in for 5V-only systems. |
Compared with SN74HCT374PW and 74LVC374APW, the SN74AHCT374PW uniquely balances 5V TTL interoperability, 80MHz capability, and industrial-grade latch-up immunity-making it optimal for retrofitting legacy 5V infrastructure with minimal redesign.
Availability
SN74AHCT374PW is available at Aetrix Electronics and suitable for industrial PLC I/O modules, test equipment data acquisition systems, and automotive body control units requiring stable component supply across extended product lifecycles.
Supply support for SN74AHCT374PW 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 SN74AHCT374PW belongs to TI's advanced high-speed CMOS logic family, engineered for robust 5V bus interfacing with TTL compatibility, high noise immunity, and reliable operation in harsh electromagnetic environments.
FAQ
What is the maximum operating temperature range for the SN74AHCT374PW?
The SN74AHCT374PW is rated for operation from –40°C to +85°C ambient temperature. This industrial-grade range ensures reliable performance in factory automation controllers, outdoor test equipment, and vehicle cabin electronics where thermal cycling occurs. The device's thermal metrics (RθJA = 116.8°C/W for PW package) support this rating under typical PCB copper pour conditions.
Does the SN74AHCT374PW require external pull-up resistors on the OE pin?
Yes - to guarantee high-impedance outputs during power-up or brownout conditions, OE should be tied to VCC via a pull-up resistor. TI recommends ≥10kΩ based on driver sink capability and noise immunity. The SN74AHCT374PW itself does not include internal pull-ups, and floating OE may cause undefined output states that risk bus contention.
Can the SN74AHCT374PW drive a 50pF capacitive load at 80MHz?
Yes - the SN74AHCT374PW is characterized for CL = 50pF in its switching specifications, with fmax = 75MHz and tPLH/tPHL ≤11.5ns. Driving 50pF at 80MHz remains within datasheet limits when using proper layout: short traces, ground plane, and local 0.1µF bypassing. Exceeding 50pF increases delay and jitter but does not damage the device.
Is the SN74AHCT374PW pin-compatible with the SN74AHCT574PW?
No - the SN74AHCT374PW (octal D flip-flop) and SN74AHCT574PW (octal D latch) have different functional behavior and pinouts. The 374 uses edge-triggered clocks and shares OE/CLK globally; the 574 uses level-sensitive latch enable and has distinct LE/CLK assignments. Their TSSOP-20 footprints differ: 374 uses pin 10 for CLK, while 574 uses pin 11 for LE - making them non-interchangeable without PCB revision.
What is the purpose of the thermal pad on the SN74AHCT374PW package?
The exposed thermal pad on the SN74AHCT374PW (TSSOP-20) is electrically isolated and may be connected to GND or left floating - TI explicitly states it must not be connected to any signal or supply net. Its primary function is mechanical stability and thermal conduction to the PCB; soldering it to a GND plane improves θJA by ~5–10°C/W but is optional for normal operation within spec limits.
SN74AHCT374PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHCT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- 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:
- 130 MHz
- Max Propagation Delay @ V, Max CL:
- 10.4ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 8mA, 8mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 4 µA
- Input Capacitance:
- 4 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74AHCT374PW FAQ
1.How can I place an order for SN74AHCT374PW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHCT374PW 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 SN74AHCT374PW reliable?
The price and inventory of SN74AHCT374PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHCT374PW is usually 5 days.
3.What payment methods are accepted for SN74AHCT374PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHCT374PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AHCT374PW?
SN74AHCT374PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHCT374PW 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 SN74AHCT374PW?
For technical support, including SN74AHCT374PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHCT374PW requirements.
6.How does Aetrix verify that SN74AHCT374PW is sourced from the original manufacturer or authorized distributors?
All SN74AHCT374PW 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 SN74AHCT374PW meets industry standards.
7.What is the process for return or replacement of SN74AHCT374PW?
All SN74AHCT374PW units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHCT374PW, 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 SN74AHCT374PW part is unused and in its original packaging.
Return procedure for SN74AHCT374PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74AHCT374PW Tags
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