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Texas Instruments SN74AHC374PWE4
- Part No.:
- SN74AHC374PWE4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AHC374PWE4.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,574
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Product details
Overview
SN74AHC374PWE4 from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for bus interface applications requiring controlled drive strength and low-output ringing. It operates from 2 V to 5.5 V, supports 8-bit parallel data latching on CLK rising edge, and features output-enable (OE) control for high-impedance bus isolation-used in server motherboards and network switches.
For engineers reviewing the SN74AHC374PWE4 datasheet, SN74AHC374PWE4 pinout, SN74AHC374PWE4 application, or SN74AHC374PWE4 equivalent, key selection criteria include its 3-state output timing (tPLH/tPHL ≤10.5 ns at 5 V), ±25 mA output drive capability, 20-pin TSSOP package, and overvoltage-tolerant inputs up to 5.5 V independent of VCC.
Technical Context
The SN74AHC374PWE4 implements eight independent D-type latches synchronized to the rising edge of CLK, with a shared active-low output-enable (OE) controlling all eight Q outputs simultaneously. Its CMOS AHC logic family ensures balanced rise/fall times and reduced signal overshoot-critical for driving capacitive bus loads without external termination.
Each channel accepts D inputs tolerant to 5.5 V regardless of VCC (2–5.5 V), enabling voltage-level translation (e.g., 5-V input to 3.3-V system). The device's slow-edge design minimizes EMI and ringing, while latch-up immunity (>250 mA per JESD17) and robust ESD protection (2000-V HBM) support industrial and telecom environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - enables interoperability across 2.5 V, 3.3 V, and 5 V logic domains |
| fMAX (CL = 15 pF) | 110 MHz at 5 V - supports high-speed register buffering in data-path pipelines |
| tPLH / tPHL | ≤10.5 ns at VCC = 5 V - ensures tight timing margins for synchronous bus interfaces |
| IOL / IOH | ±8 mA at 5 V - provides sufficient drive for TTL/CMOS loads without external buffers |
| Input Voltage Tolerance | Up to 5.5 V - allows 5-V signals into 3.3-V systems without level shifters |
| ESD Rating (HBM) | 2000 V - meets industrial handling requirements per ANSI/ESDA/JEDEC JS-001 |
| Operating Temperature | –40°C to +125°C - qualified for extended-temperature embedded and infrastructure applications |
Pinout & Package
TSSOP-20 (PW) package: 6.50 mm × 6.40 mm body size, 0.65 mm lead pitch, surface-mount, RoHS-compliant, moisture sensitivity level (MSL) 1.
| 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 |
| 2–9, 12–19 (Q1–Q8, D1–D8) | Data outputs / inputs | Octal D-to-Q path: each Q reflects corresponding D on CLK rising edge when OE is active |
| 11 (CLK) | Clock input | Edge-sensitive trigger-only rising edge captures D inputs; asynchronous reset not supported |
| 10 (GND) | Ground reference | Common return for all internal logic and I/O; requires low-inductance connection to minimize noise |
| 20 (VCC) | Power supply | Single-supply rail powering core logic and output drivers; bypass capacitor mandatory per TI layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| 3-State Output Control | Shared OE pin enables simultaneous bus release across all 8 channels-eliminates need for discrete enable logic |
| Overvoltage-Tolerant Inputs | D and CLK accept up to 5.5 V regardless of VCC setting-simplifies mixed-voltage board design |
| Controlled Edge Rate | Slower transitions reduce output ringing and EMI-critical for clean signal integrity on long PCB traces |
| Latch-Up Immunity | Exceeds 250 mA per JESD17-ensures robustness against transient current faults in noisy environments |
| Low Power Dissipation | ICC ≤ 40 µA at 5.5 V - supports energy-efficient operation in always-on infrastructure nodes |
Applications
| Server Motherboard I/O Expansion | Industrial Network Switch Buffering |
|---|---|
Use Scenario: Expanding PCIe or LPC bus I/O with isolated register staging between chipset and peripheral slots. IC Role / Device Role / Timing Role: Acts as octal transparent latch and bus isolator-holds configuration data during hot-plug events and prevents backdrive. Use Value: 3-state outputs eliminate contention during reconfiguration; 125°C rating supports dense thermal environments near VRMs. | Use Scenario: Buffering control signals between switch ASIC and PHY management interfaces in 10/25 GbE line cards. IC Role / Device Role / Timing Role: Synchronizes GPIO and status bits across voltage domains using CLK edge capture and OE-controlled bus release. Use Value: Input overvoltage tolerance allows direct connection to 5-V management buses; low propagation skew (<1.5 ns) maintains timing alignment. |
| Test & Measurement Equipment Data Capture | Motor Control System Register Interface |
Use Scenario: Capturing parallel sensor or DAC output data streams under precise trigger conditions in automated test systems. IC Role / Device Role / Timing Role: Edge-triggered D-flip-flop capturing 8-bit sampled values on system clock rising edge for FIFO loading. Use Value: Sub-11 ns propagation delay at 5 V enables <100 MHz sampling coordination; high-impedance outputs prevent loading during idle cycles. | Use Scenario: Interfacing microcontroller GPIO to multi-channel gate driver ICs requiring synchronized enable/disable sequencing. IC Role / Device Role / Timing Role: Latching PWM enable bits and fault flags across isolated power domains before driver activation. Use Value: Robust latch-up immunity (>250 mA) withstands motor drive transients; wide VCC range simplifies auxiliary supply design. |
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 |
|---|---|---|---|
| SN74LVC374APW | Lower VCC range (1.65–3.6 V); faster tPLH (6.7 ns @ 3.3 V); no 5-V input tolerance | Optimized for 3.3-V-only systems; unsuitable for mixed-voltage translation | Select when operating exclusively at 3.3 V and maximum speed is prioritized over voltage flexibility |
| 74AHC574PW | Identical AHC family specs; same pinout and timing; identical 2–5.5 V range and 5.5-V input tolerance | No functional difference-direct second-source alternative with identical qualification | Preferred for supply chain diversification without design change or requalification |
Compared with SN74LVC374APW, SN74AHC374PWE4 provides broader voltage compatibility and input overvoltage safety; compared with 74AHC574PW, it offers identical performance and drop-in replacement capability-making it optimal for legacy AHC-based designs requiring continuity and mixed-voltage robustness.
Availability
SN74AHC374PWE4 is available at Aetrix Electronics and suitable for server motherboard I/O expansion, industrial network switch buffering, and test & measurement equipment requiring stable component supply across extended temperature and mixed-voltage environments.
Supply support for SN74AHC374PWE4 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 SN74AHC374PWE4 belongs to TI's advanced high-speed CMOS (AHC) logic family-designed specifically for low-noise, high-drive bus interfacing with voltage translation and robust ESD/latch-up performance.
FAQ
What is the maximum clock frequency supported by SN74AHC374PWE4 at 3.3 V?
At VCC = 3.3 V ± 0.3 V and CL = 15 pF, SN74AHC374PWE4 supports a maximum clock frequency of 70 MHz across its full operating temperature range (–40°C to +125°C). This value is specified in the switching characteristics table and accounts for worst-case process/voltage/temperature corners.
Does SN74AHC374PWE4 support 5-V input signals when powered at 3.3 V?
Yes, SN74AHC374PWE4 supports input voltages up to 5.5 V on all D and CLK pins-even when VCC is as low as 2 V. This overvoltage tolerance enables reliable level translation from 5-V peripherals into 3.3-V systems without external components.
What is the purpose of the OE pin on SN74AHC374PWE4?
The OE (output enable) pin on SN74AHC374PWE4 is an active-low control that places all eight Q outputs simultaneously into high-impedance state when asserted high. When OE is low, outputs reflect latched D-input values-enabling bidirectional bus arbitration and preventing contention.
Can SN74AHC374PWE4 be used in automotive applications?
SN74AHC374PWE4 is not AEC-Q100 qualified and is rated for –40°C to +125°C operation-suitable for under-hood industrial or telecom infrastructure, but not certified for automotive safety-critical ECUs. For automotive use, TI recommends AEC-Q100 qualified alternatives like SN74AHC374QPWRQ1.
What decoupling capacitance is recommended for SN74AHC374PWE4?
Texas Instruments recommends a 0.1-µF ceramic capacitor placed as close as possible to the VCC pin of SN74AHC374PWE4. For boards with multiple power pins or high-frequency noise, paralleling with a 1-µF capacitor improves broadband suppression-per TI's layout guidelines in Section 8.3.
SN74AHC374PWE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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:
- 120 MHz
- Max Propagation Delay @ V, Max CL:
- 10.1ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 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
SN74AHC374PWE4 FAQ
1.How can I place an order for SN74AHC374PWE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC374PWE4 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 SN74AHC374PWE4 reliable?
The price and inventory of SN74AHC374PWE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC374PWE4 is usually 5 days.
3.What payment methods are accepted for SN74AHC374PWE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHC374PWE4 transactions.
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4.How is shipping managed for SN74AHC374PWE4?
SN74AHC374PWE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC374PWE4 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 SN74AHC374PWE4?
For technical support, including SN74AHC374PWE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC374PWE4 requirements.
6.How does Aetrix verify that SN74AHC374PWE4 is sourced from the original manufacturer or authorized distributors?
All SN74AHC374PWE4 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 SN74AHC374PWE4 meets industry standards.
7.What is the process for return or replacement of SN74AHC374PWE4?
All SN74AHC374PWE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC374PWE4, 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 SN74AHC374PWE4 part is unused and in its original packaging.
Return procedure for SN74AHC374PWE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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