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Texas Instruments SN74F374DW
- Part No.:
- SN74F374DW
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74F374DW.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,243
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Product details
Overview
SN74F374DW from Texas Instruments is an 8-bit edge-triggered D-type flip-flop IC with 3-state bus-driving outputs, designed for parallel data latching in digital systems. It operates from 0°C to 70°C, supports 5 V supply, delivers ±48 mA output drive, and features buffered OE control enabling high-impedance bus isolation-used in I/O port buffering and bidirectional bus interfacing.
For engineers reviewing the SN74F374DW datasheet, SN74F374DW pinout, SN74F374DW application, or SN74F374DW equivalent, this page provides verified functional specifications, SOIC-20 package details, timing parameters (tPLH ≤ 10 ns, fmax = 70 MHz), and validated alternatives for legacy TTL bus interface design.
Technical Context
The SN74F374DW implements eight independent D-type flip-flops triggered on the positive clock edge, with synchronous data capture and asynchronous 3-state output control via OE. Its internal logic retains stored data regardless of OE state, allowing concurrent register update and bus release.
Designed for F-series TTL compatibility, it meets VIH ≥ 2 V and VIL ≤ 0.8 V input thresholds, drives capacitive loads up to 50 pF with tPZH ≤ 12.5 ns, and sustains 24 mA low-level output current at VCC = 4.5 V-enabling direct connection to standard 5 V CMOS/TTL buses without pull-ups or level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | F-series TTL - ensures compatible voltage thresholds and noise margins with legacy 5 V digital systems |
| Function | 8-bit positive-edge D flip-flop with 3-state outputs - enables synchronized parallel data capture and controlled bus driving |
| Supply Voltage | 4.5 V to 5.5 V - matches standard 5 V rail tolerance; operation outside this range risks damage or undefined behavior |
| Max Clock Frequency | 70 MHz - supports high-speed data latching in real-time control and instrumentation interfaces |
| Output Drive | 24 mA sink / 3 mA source - sufficient to drive multiple TTL inputs or moderate-capacitance PCB traces directly |
| Propagation Delay | tPLH/tPHL ≤ 10 ns - guarantees sub-14 ns total clock-to-Q delay, critical for tight timing budgets in synchronous logic |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade industrial and computing applications, not extended/military range |
Pinout & Package
SN74F374DW is housed in a 20-pin SOIC (DW) package measuring 13.0 mm × 7.6 mm × 2.65 mm, with 1.27 mm lead pitch and gull-wing leads. Pin 1 is located at the top-left corner adjacent to the index notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Output Enable | Active-low control: asserts high-impedance state on all Q outputs when high; no effect on internal flip-flop operation |
| 2–9, 11–18 (1D–8D, 1Q–8Q) | Data Inputs / True Outputs | Paired D/Q channels per bit; each Q reflects corresponding D sampled at CLK↑; all outputs share common OE |
| 10 (GND) | Ground Reference | Primary return path for logic and output currents; must be low-impedance to maintain noise margin and switching integrity |
| 19 (CLK) | Clock Input | Positive-edge-triggered master clock; data setup/hold times (tsu/th = 2 ns) require precise timing relative to this signal |
| 20 (VCC) | Power Supply | +5 V supply input; requires local 0.1 µF ceramic decoupling near pin to suppress switching transients |
Key Features
| Feature | Design Value |
|---|---|
| 3-State Bus Driving | Enables shared-bus architectures by electrically isolating outputs without external tri-state buffers or resistors |
| Full Parallel Access | All eight D inputs accept new data simultaneously, supporting byte-wide register loading in one clock cycle |
| Buffered Control Inputs | OE and CLK inputs include Schmitt-trigger-like hysteresis, improving noise immunity on long traces or noisy boards |
| High-Drive Capability | 24 mA sink current allows direct driving of up to 10 standard TTL loads, eliminating fanout-limiting repeaters |
| Retained Data During OE High | Internal flip-flop state remains unchanged while outputs are disabled-supports pipelined read-modify-write sequences |
Applications
| Industrial I/O Expansion | Legacy System Bus Interface |
|---|---|
Use Scenario: Adding parallel digital I/O capability to PLC backplanes or motion controller modules using existing 5 V TTL infrastructure. IC Role / Device Role / Timing Role: Acts as an output latch and input buffer between microcontroller GPIO and field-side optocoupled drivers or sensors. Use Value: Eliminates need for discrete buffers or level translators; 24 mA drive directly energizes relay coils or LED indicators. | Use Scenario: Interfacing modern FPGA-based controllers with legacy 8-bit ISA or VMEbus peripherals requiring TTL-compatible latched data paths. IC Role / Device Role / Timing Role: Serves as a bidirectional data register synchronized to system clock, with OE coordinated to bus grant signals. Use Value: Provides deterministic 10 ns clock-to-output timing and 12.5 ns OE-to-high-Z transition-ensuring bus turnaround compliance. |
| Test Equipment Data Capture | Digital Signal Acquisition Front-End |
Use Scenario: Capturing parallel sensor outputs (e.g., ADC result buses) in automated test equipment where sampling must align precisely with trigger events. IC Role / Device Role / Timing Role: Functions as a synchronous sample-and-hold register, freezing analog-to-digital conversion results on CLK↑. Use Value: 2 ns data setup time enables reliable capture of fast-changing digital waveforms without metastability risk. | Use Scenario: Buffering multiplexed digital sensor streams (e.g., temperature, pressure, position) before serial transmission to host processors. IC Role / Device Role / Timing Role: Provides temporary storage and bus isolation during multiplexer channel switching cycles. Use Value: High-impedance outputs prevent crosstalk between active and inactive sensor channels during acquisition sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit D-type latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74F373DW | Latch instead of flip-flop: transparent D-input behavior while LE is low; no clock edge sensitivity | Suitable for address/data demultiplexing where gated transparency is required, not edge-triggered sampling | Select SN74F373DW only if system timing relies on level-sensitive gating rather than synchronous clock edges |
| SN74LS374N | Lower power (20 mA IOL), slower speed (fmax = 30 MHz), same SOIC-20 pinout and function | Better suited for low-noise, low-power legacy designs where 70 MHz timing is unnecessary | Choose SN74LS374N when thermal budget or EMI constraints outweigh need for maximum throughput |
Compared with SN74F374DW, SN74F373DW replaces edge-triggered behavior with level-sensitive latching-altering timing control methodology-while SN74LS374N trades 2.3× lower speed and reduced drive for 40% lower power consumption, maintaining identical pin compatibility for drop-in replacement in non-critical timing paths.
Availability
SN74F374DW is available at Aetrix Electronics and suitable for industrial I/O expansion, legacy system bus interface, and test equipment data capture requiring stable component supply across long-lifecycle embedded programs.
Supply support for SN74F374DW 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 founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The SN74F374DW belongs to TI's F-series TTL logic family, engineered for high-speed, robust 5 V digital interfacing in mission-critical industrial control and instrumentation systems.
FAQ
What is the operating temperature range for SN74F374DW?
The SN74F374DW is characterized for operation from 0°C to 70°C, meeting commercial-grade environmental requirements. It is not rated for extended temperature ranges such as −40°C to 85°C or military −55°C to 125°C. This specification is confirmed in the absolute maximum ratings table and recommended operating conditions section of the official TI datasheet SDFS077A. Operation outside 0°C–70°C may result in timing violations or functional failure.
Does SN74F374DW support 3.3 V logic levels?
No, SN74F374DW does not support 3.3 V logic operation. It requires a 4.5 V to 5.5 V supply and defines VIH ≥ 2.0 V and VIL ≤ 0.8 V-compatible only with 5 V TTL/CMOS families. Driving its inputs from 3.3 V sources may cause marginal or incorrect logic recognition, and powering it at 3.3 V will result in undefined behavior or failure. For 3.3 V systems, consider logic-level translators or newer 3.3 V–tolerant alternatives.
Can SN74F374DW replace SN74LS374 in an existing design?
SN74F374DW can replace SN74LS374 in most cases due to identical pinout, function, and 5 V supply compatibility-but with critical trade-offs: SN74F374DW offers higher speed (70 MHz vs. 30 MHz) and stronger drive (24 mA vs. 20 mA), yet consumes more power and generates more noise. Verify timing margins and thermal dissipation in the target application before substitution, as the faster edges may exacerbate signal integrity issues on long traces.
What is the meaning of "DW" in SN74F374DW?
The "DW" suffix in SN74F374DW denotes the SOIC (Small Outline Integrated Circuit) package type-specifically a 20-pin wide-body SOIC with 1.27 mm lead pitch and 7.6 mm body width. This is distinct from "DB" (SSOP), "N" (PDIP), or "W" (CFP) variants. The DW package is surface-mount compatible, RoHS-compliant (with NIPDAU finish), and has MSL Level-1 rating for unlimited floor life under JEDEC standards.
Is SN74F374DW still in active production?
According to TI's official packaging addendum, SN74F374DW is marked as "Obsolete" status, while SN74F374DWR (tape-and-reel variant) remains active. Obsolete status indicates TI no longer manufactures new units, though limited legacy stock may be available through authorized distributors. For new designs, TI recommends migration to active alternatives like SN74F374DWR or newer logic families with extended support lifecycles.
SN74F374DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74F
- Package/Case:
- 20-SOIC (0.295", 7.50mm 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:
- 100 MHz
- Max Propagation Delay @ V, Max CL:
- 8.5ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 3mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- -
- Input Capacitance:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74F374DW FAQ
1.How can I place an order for SN74F374DW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74F374DW 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 SN74F374DW reliable?
The price and inventory of SN74F374DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74F374DW is usually 5 days.
3.What payment methods are accepted for SN74F374DW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74F374DW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74F374DW?
SN74F374DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74F374DW 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 SN74F374DW?
For technical support, including SN74F374DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74F374DW requirements.
6.How does Aetrix verify that SN74F374DW is sourced from the original manufacturer or authorized distributors?
All SN74F374DW 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 SN74F374DW meets industry standards.
7.What is the process for return or replacement of SN74F374DW?
All SN74F374DW units undergo pre-shipment inspection (PSI). If there is an issue with SN74F374DW, 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 SN74F374DW part is unused and in its original packaging.
Return procedure for SN74F374DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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