My Inquiry
My Account
Texas Instruments SN74F377ADWR
- Part No.:
- SN74F377ADWR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74F377ADWR.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,309
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74F377ADWR from Texas Instruments is an octal D-type flip-flop with latched clock enable, designed for synchronous data latching in digital logic systems. It features eight independent positive-edge-triggered flip-flops, single-rail outputs, and operates at up to 110 MHz over 0°C to 70°C. Used in buffer/storage registers and shift registers requiring deterministic edge-triggered storage.
For engineers reviewing the SN74F377ADWR datasheet, SN74F377ADWR pinout, SN74F377ADWR application, or SN74F377ADWR equivalent, key selection criteria include clock enable latching behavior, 20-pin SOIC (DW) package compatibility, guaranteed 110 MHz max clock frequency, and TTL-level input/output thresholds under 5 V operation.
Technical Context
The SN74F377ADWR implements eight independent D-type latches synchronized to the rising edge of CLK only when CE is low; CE is internally latched to prevent metastability-induced false triggering. Its logic design ensures immunity to CE transitions during clock assertion, meeting ANSI/IEEE Std 91-1984 symbol conventions.
It operates strictly within 4.5 V–5.5 V supply range with VIH ≥ 2 V and VIL ≤ 0.8 V, delivering VOH ≥ 2.5 V at –1 mA and VOL ≤ 0.5 V at 20 mA sink current. Timing is characterized across temperature with 4 ns minimum pulse width and 4 ns setup time for CE-low condition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | F-series TTL - ensures interoperability with legacy 74F logic and defined noise margins at 5 V |
| Max Clock Frequency | 110 MHz - supports high-speed register staging in pipeline control and address latching |
| Supply Voltage Range | 4.5 V to 5.5 V - requires stable 5 V rail; not compatible with 3.3 V systems without level translation |
| Output Drive | 20 mA sink / –1 mA source - sufficient for direct TTL fanout (up to 10 74F loads) |
| Operating Temperature | 0°C to 70°C - rated for commercial-grade environments, not extended industrial or automotive |
| Propagation Delay | 4–10.5 ns (tPLH/tPHL) - enables sub-10 ns timing-critical path insertion in synchronous designs |
Pinout & Package
SN74F377ADWR is housed in a 20-pin SOIC (DW) package, 7.5 mm wide, 12.8 mm long, 2.65 mm max height, with 1.27 mm pitch and RoHS-compliant NiPdAu lead finish. Moisture sensitivity level is Level-1 (unlimited floor life at ≤30°C/60% RH).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CE (Clock Enable) | Latched active-low enable controlling all eight flip-flops; prevents spurious clocking on CE transients |
| 2–9, 11–18 | D1–D4, Q1–Q4, D5–D8, Q5–Q8 | Paired data inputs and non-inverted outputs per flip-flop; no complementary outputs provided |
| 10 | GND | Ground reference for logic and power return; must be low-impedance for noise immunity |
| 19 | VCC | +5 V supply pin; decoupling capacitor required near pin for transient current handling |
| 20 | CLK | Global positive-edge clock input; triggers all eight flip-flops simultaneously when CE = L |
Key Features
| Feature | Design Value |
|---|---|
| Latched CE input | Eliminates race conditions caused by asynchronous CE transitions during clock assertion |
| Single-rail Q outputs | Reduces PCB trace count vs. dual-rail (Q/Q̅) devices; simplifies interface to downstream TTL loads |
| Guaranteed 110 MHz operation | Enables use in high-throughput data capture stages where cycle time ≤ 9.1 ns is required |
| TTL-compatible I/O thresholds | Ensures reliable interfacing with 74F, 74LS, and other 5 V logic families without external biasing |
Applications
| Buffer/Storage Register | Shift Register Stage |
|---|---|
Use Scenario: Holding parallel data from an ADC or bus interface before CPU read. IC Role / Device Role / Timing Role: Synchronous 8-bit data latch aligned to system clock edge with gated enable. Use Value: Prevents metastability and ensures clean setup/hold timing via latched CE and 4 ns min pulse width. | Use Scenario: One stage in a serial-to-parallel shift register driving LED displays or control lines. IC Role / Device Role / Timing Role: Edge-triggered parallel load element accepting shifted data on CLK↑ when CE = L. Use Value: Enables precise inter-stage synchronization at up to 110 MHz, minimizing skew between bits. |
| Pattern Generator | Address Latch |
Use Scenario: Generating fixed test patterns for memory or FPGA configuration circuits. IC Role / Device Role / Timing Role: Static 8-bit pattern storage element updated only on enabled clock edges. Use Value: Provides deterministic output state changes with no glitches due to CE latching and no internal feedback paths. | Use Scenario: Latching upper address byte during multiplexed bus cycles in 8086/8088-based systems. IC Role / Device Role / Timing Role: Transparent hold register capturing address bits at precise CPU control signal timing. Use Value: Meets strict 4 ns setup/1 ns hold window for 8086-compatible bus protocols using TTL-level signaling. |
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 |
|---|---|---|---|
| SN74ALS377AN | ALS-family; lower ICC (20 mA typ), higher VIH (2.0 V min), same 20-pin PDIP/SOIC footprint | Better noise margin and reduced power, but slower max fclock (50 MHz) and higher input capacitance | Select for lower power and improved noise immunity where speed ≤ 50 MHz suffices |
| SN74ACT377PW | ACT-family; 5 V CMOS; rail-to-rail VOH/VOL, 30 MHz max fclock, TSSOP-20 package | CMOS input thresholds (VIH = 3.5 V), incompatible with TTL drive without level shift; smaller footprint | Select for mixed-voltage systems needing 5 V CMOS compatibility and space-constrained layouts |
Compared with SN74F377ADWR, SN74ALS377AN trades speed for lower power and better noise rejection, while SN74ACT377PW shifts to CMOS logic thresholds and sacrifices frequency headroom for voltage flexibility and package density.
Availability
SN74F377ADWR is available at Aetrix Electronics and suitable for buffer/register design, legacy system repair, and industrial control logic requiring stable component supply with full traceability and lifecycle support.
Supply support for SN74F377ADWR 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 U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and logic ICs with broad industrial and automotive qualification.
The SN74F377ADWR belongs to TI's 74F TTL logic family, engineered for high-speed, noise-tolerant digital control in commercial-grade computing and instrumentation systems.
FAQ
What is the maximum operating frequency of the SN74F377ADWR?
The SN74F377ADWR is characterized for operation up to 110 MHz under recommended conditions (VCC = 4.5 V to 5.5 V, TA = 0°C to 70°C). This maximum clock frequency is validated with CL = 50 pF and RL = 500 Ω load, and applies only when CE is held low during clock assertion. The SN74F377ADWR achieves this performance using F-series TTL circuitry optimized for speed and edge fidelity.
Does the SN74F377ADWR support 3.3 V operation?
No, the SN74F377ADWR does not support 3.3 V operation. Its absolute maximum supply voltage is 7 V, but recommended operation is strictly 4.5 V to 5.5 V. Input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and output drive characteristics are specified only for 5 V TTL-compatible systems. Using the SN74F377ADWR with a 3.3 V supply risks undefined logic states and degraded timing margins.
What is the purpose of the latched CE input in the SN74F377ADWR?
The latched CE input in the SN74F377ADWR prevents false clocking caused by glitches or bounce on the enable line during clock transitions. Internally, CE is sampled and held before the clock edge, ensuring that only stable CE states determine whether data transfers occur on CLK↑. This behavior is explicitly documented in the function table and timing diagrams of the SN74F377ADWR datasheet and distinguishes it from non-latched enable variants.
Is the SN74F377ADWR pin-compatible with the SN74F377AN?
Yes, the SN74F377ADWR and SN74F377AN share identical pinouts and electrical specifications, differing only in package type: DW (SOIC-20) versus N (PDIP-20). Both use the same 20-pin layout with CE on pin 1, CLK on pin 20, VCC on pin 19, and GND on pin 10. This allows direct substitution in existing designs when transitioning from through-hole to surface-mount assembly, provided board layout accommodates SOIC dimensions.
What are the thermal and reliability qualifications for the SN74F377ADWR?
The SN74F377ADWR is characterized for operation from 0°C to 70°C ambient temperature and qualified per Texas Instruments' standard commercial-grade reliability protocols. It has a storage temperature range of –65°C to 150°C and moisture sensitivity level (MSL) rating of Level-1 (unlimited floor life at ≤30°C/60% RH). The SN74F377ADWR undergoes production testing per TI's standard warranty terms, with no burn-in or extended life testing implied unless specified separately.
SN74F377ADWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74F
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
SN74F377ADWR FAQ
1.How can I place an order for SN74F377ADWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74F377ADWR 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 SN74F377ADWR reliable?
The price and inventory of SN74F377ADWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74F377ADWR is usually 5 days.
3.What payment methods are accepted for SN74F377ADWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74F377ADWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74F377ADWR?
SN74F377ADWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74F377ADWR 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 SN74F377ADWR?
For technical support, including SN74F377ADWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74F377ADWR requirements.
6.How does Aetrix verify that SN74F377ADWR is sourced from the original manufacturer or authorized distributors?
All SN74F377ADWR 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 SN74F377ADWR meets industry standards.
7.What is the process for return or replacement of SN74F377ADWR?
All SN74F377ADWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74F377ADWR, 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 SN74F377ADWR part is unused and in its original packaging.
Return procedure for SN74F377ADWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74F377ADWR Tags
-
SN74HC74DR
Texas Instruments
-
SN74HC74PWR
Texas Instruments
-
74LVC1G74GT,115
Nexperia USA Inc.
-
SN74LVC2G74DCUR
Texas Instruments
-
CD4013BM96
Texas Instruments
-
SN74HCT273PWR
Texas Instruments
-
SN74LVC1G74DCUR
Texas Instruments
-
SN74HC574DWR
Texas Instruments
-
74LVC1G74DC,125
Nexperia USA Inc.
-
SN74HC273DWR
Texas Instruments
-
SN74HCT574DWR
Texas Instruments
-
SN74LVC1G74DCTR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
