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Texas Instruments SN74F377ADW
- Part No.:
- SN74F377ADW
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74F377ADW.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:833
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Product details
Overview
SN74F377ADW from Texas Instruments is an octal positive-edge-triggered D-type flip-flop with latched clock enable (CE), designed for synchronous data storage and register applications in TTL-compatible 5-V systems. It features eight independent D-to-Q channels, single-rail outputs, and operates across 0°C to 70°C with 110 MHz max clock frequency and 4 ns typical propagation delay (tPLH/tPHL).
For engineers reviewing the SN74F377ADW datasheet, SN74F377ADW pinout, SN74F377ADW application, or SN74F377ADW equivalent, this device is selected for high-speed buffered register functions where CE latching prevents false clocking, precise setup/hold timing (tsu = 4 ns, th = 1 ns), and robust 20-pin SOIC (DW) packaging supports dense PCB layouts.
Technical Context
The SN74F377ADW implements eight edge-triggered D flip-flops sharing a common clock and latched CE input - CE state is sampled on the preceding clock edge to avoid metastability-induced spurious triggering. Each channel transfers D-input data to Q-output only on the positive-going clock edge when CE is low, with no output change when CE is high or clock is static.
Its electrical design complies with F-series TTL logic thresholds (VIH = 2 V, VIL = 0.8 V), delivers 20 mA sink current (IOL), supports 5-V supply (4.5–5.5 V), and uses standard SOIC-20 package with 1.27 mm pitch, 7.6 mm width, and 13.0 mm length per JEDEC MS-013.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | F-series TTL - ensures compatibility with legacy 74F systems and defined noise margins at 5 V. |
| Max Clock Frequency | 110 MHz - enables use in high-speed register pipelines and pattern generators up to ~9 ns minimum clock period. |
| Propagation Delay (tPLH/tPHL) | 4–10.5 ns - determines worst-case timing budget for synchronous data path alignment in register chains. |
| Setup/Hold Time (tsu/th) | 4 ns / 1 ns - defines minimum D-input stability window before and after CLK↑ for reliable capture under worst-case conditions. |
| Output Drive (IOL/IOH) | 20 mA / –1 mA - supports direct fanout to ≥10 standard TTL loads without buffering. |
| Supply Voltage Range | 4.5 V to 5.5 V - constrains operation to regulated 5-V rails; not suitable for 3.3-V or mixed-voltage domains. |
| Operating Temperature | 0°C to 70°C - rated for commercial-grade environments only; not qualified for industrial or automotive temperature ranges. |
Pinout & Package
SN74F377ADW is housed in a 20-pin SOIC (DW) package per JEDEC MS-013, with 1.27 mm lead pitch, 7.6 mm body width, and 13.0 mm length. Pin 1 is located at the top-left corner (Q1 quadrant) of the tape-and-reel orientation, marked by a beveled edge or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CE (Clock Enable) | Latched active-low enable controlling all eight flip-flops; prevents false clocking during CE transitions. |
| 2–9, 11–18 | D1–D4, Q1–Q4, D5–D8, Q5–Q8 | Eight independent D inputs and Q outputs arranged in two groups of four; no internal inversion or bus contention. |
| 10 | GND | Ground reference for all logic and output stages; must be low-impedance for stable switching. |
| 19 | CLK | Common positive-edge-triggered clock input shared across all eight flip-flops. |
| 20 | VCC | +5 V power supply; decoupling capacitor required within 1 cm of pin to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Latched Clock Enable | CE state is sampled and held on prior clock edge, eliminating race conditions during asynchronous CE changes. |
| Single-Rail Outputs | All Q outputs drive high/low directly without complementary (Q̅) pins - simplifies PCB routing and reduces pin count. |
| Buffered Common Enable | Internal CE buffer drives all eight flip-flop enable paths with matched delay, ensuring simultaneous channel gating. |
| TTL-Compatible Thresholds | VIH = 2 V and VIL = 0.8 V guarantee interoperability with standard 74F/74LS logic families without level-shifting. |
| High-Speed Propagation | 4 ns typical tPLH/tPHL enables tight timing closure in register-based control logic and shift-register feedback loops. |
Applications
| Buffer/Storage Registers | Shift Registers |
|---|---|
|
Use Scenario: Holding parallel data from a microprocessor data bus during memory read/write cycles. IC Role / Device Role / Timing Role: Synchronous 8-bit latch providing glitch-free data hold synchronized to system clock and gated by CE. Use Value: Eliminates need for discrete gating logic; CE latching prevents data corruption during dynamic enable assertion. |
Use Scenario: Constructing a serial-in/parallel-out (SIPO) shift register using cascaded SN74F377ADW devices. IC Role / Device Role / Timing Role: Octal stage element accepting serial data via D1 and propagating through Q1→D2 chain on each CLK edge. Use Value: Enables compact 8-bit shift stages with predictable 4 ns propagation per stage and minimal external components. |
| Pattern Generators | Control Logic Sequencers |
|
Use Scenario: Generating fixed test patterns for digital circuit validation using preloaded D inputs and free-running CLK. IC Role / Device Role / Timing Role: Static register holding deterministic bit patterns; Q outputs drive test stimulus lines directly. Use Value: Provides stable, jitter-free pattern output with 20 mA drive strength sufficient for multiple TTL loads. |
Use Scenario: Implementing finite-state machine outputs in industrial controller backplanes requiring synchronized status flags. IC Role / Device Role / Timing Role: Edge-triggered register capturing next-state bits from combinational logic on each system clock cycle. Use Value: CE latching ensures state updates occur only during valid clock phases, preventing metastable transitions. |
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 |
|---|---|---|---|
| SN74F374N | Octal D-type transparent latch (no CE latching); outputs follow D while LE is low, then hold on LE↑. | Used where level-sensitive gating is preferred over edge-triggered CE control; lacks CE metastability immunity. | Select SN74F374N only if latch behavior (not flip-flop) matches system timing architecture. |
| SN74ACT377PW | Advanced CMOS version with 5-V tolerance, 3.3-V compatible inputs, lower ICC (2 µA), and 10 ns max tPD. | Suitable for mixed-voltage systems and lower-power designs; requires careful handling of CMOS input thresholds. | Choose SN74ACT377PW when upgrading from F-TTL for reduced power or interfacing with 3.3-V logic, not as drop-in replacement. |
Compared with SN74F377ADW, SN74F374N provides transparent latching instead of edge-triggered storage, while SN74ACT377PW offers CMOS efficiency and voltage flexibility but requires redesign for input threshold and drive compatibility.
Availability
SN74F377ADW is available at Aetrix Electronics and suitable for legacy system repair, military avionics sustainment, industrial PLC upgrades, and educational lab equipment requiring stable component supply with documented F-TTL timing behavior.
Supply support for SN74F377ADW 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 with broad industrial and automotive qualification.
The SN74F377ADW belongs to TI's 74F TTL logic family, engineered for high-speed commercial-grade digital systems requiring deterministic propagation, robust noise immunity, and backward compatibility with 74-series architectures.
FAQ
What is the operating temperature range for the SN74F377ADW?
The SN74F377ADW is characterized for operation from 0°C to 70°C only. It is not rated for extended industrial (–40°C to 85°C) or automotive temperature ranges. Designs requiring wider thermal margins must select alternative logic families such as 74ACT or 74LVC, as the SN74F377ADW's internal TTL circuitry exhibits parameter drift outside its specified commercial range.
Does the SN74F377ADW support 3.3-V logic interfaces?
No, the SN74F377ADW does not support 3.3-V logic interfaces. Its input thresholds (VIH = 2 V, VIL = 0.8 V) and 4.5–5.5 V supply requirement make it incompatible with 3.3-V signaling. Direct connection to 3.3-V drivers risks violating VIH min or exceeding absolute maximum input voltage ratings. Level translation or substitution with 5-V tolerant CMOS variants like SN74ACT377 is required.
Is the SN74F377ADW pin-compatible with the SN74F377AN?
Yes, the SN74F377ADW (SOIC-20) and SN74F377AN (PDIP-20) share identical pinout and electrical functionality. Both use the same 20-pin arrangement with CE on pin 1, CLK on pin 19, VCC on pin 20, and GND on pin 10. However, physical mounting, thermal performance, and reflow requirements differ due to package type - SOIC requires controlled reflow, while PDIP supports wave soldering.
What is the purpose of the latched CE input in the SN74F377ADW?
The latched CE input in the SN74F377ADW samples and holds the enable state on the previous clock edge, preventing false triggering caused by CE transitions coinciding with CLK edges. This eliminates metastability risk and ensures that all eight flip-flops respond synchronously to the same CE state during the subsequent clock cycle - a critical feature for reliable register file operation in synchronous systems.
Can the SN74F377ADW drive LED indicators directly?
Yes, the SN74F377ADW can drive standard LEDs directly when configured as a current-sink interface: connect LED anode to VCC via current-limiting resistor (e.g., 330 Ω), and cathode to a Q output. With IOL = 20 mA guaranteed, it safely sources up to ~15 mA LED current. Avoid sourcing from VOH - its IOH is only –1 mA, insufficient for typical LED forward currents.
SN74F377ADW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74F
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 125 MHz
- Max Propagation Delay @ V, Max CL:
- 9ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 1mA, 20mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 72 mA
- Input Capacitance:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74F377ADW FAQ
1.How can I place an order for SN74F377ADW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74F377ADW 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 SN74F377ADW reliable?
The price and inventory of SN74F377ADW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74F377ADW is usually 5 days.
3.What payment methods are accepted for SN74F377ADW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74F377ADW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74F377ADW?
SN74F377ADW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74F377ADW 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 SN74F377ADW?
For technical support, including SN74F377ADW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74F377ADW requirements.
6.How does Aetrix verify that SN74F377ADW is sourced from the original manufacturer or authorized distributors?
All SN74F377ADW 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 SN74F377ADW meets industry standards.
7.What is the process for return or replacement of SN74F377ADW?
All SN74F377ADW units undergo pre-shipment inspection (PSI). If there is an issue with SN74F377ADW, 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 SN74F377ADW part is unused and in its original packaging.
Return procedure for SN74F377ADW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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