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Texas Instruments SN74ABT377APWR
- Part No.:
- SN74ABT377APWR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74ABT377APWR.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,107
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Product details
Overview
SN74ABT377APWR from Texas Instruments is an octal positive-edge-triggered D-type flip-flop with clock enable, designed for high-speed 5-V digital logic systems. It features 8-bit storage, ±32-mA/±64-mA high-drive outputs, 150-MHz maximum clock frequency, and operates from –40°C to 85°C. It is used in buffer registers, shift registers, and pattern generators in industrial control and data acquisition systems.
For engineers reviewing the SN74ABT377APWR datasheet, SN74ABT377APWR pinout, SN74ABT377APWR application, or SN74ABT377APWR equivalent, this page delivers verified electrical specs, TSSOP-20 package details, timing parameters (tsu = 2 ns, th = 1.2 ns), output drive capability, and real-world use cases - all confirmed from TI's official SCBS156E datasheet and packaging addendum.
Technical Context
This device implements eight independent D-type latches synchronized to the rising edge of CLK, enabled only when CLKEN is low. Each flip-flop transfers D-input data to Q-output on CLK↑ under valid setup/hold timing, with no response to CLK transitions when CLKEN is high.
Its EPIC-IIB BiCMOS process enables low power dissipation while delivering TTL-compatible voltage thresholds (VIH = 2 V, VIL = 0.8 V), robust latch-up immunity (>500 mA), and ground-bounce suppression (VOLP < 1 V at 5 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Octal D-type flip-flop with clock enable (CLKEN active-low) |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5-V TTL and CMOS systems |
| Max Clock Frequency | 150 MHz - supports high-throughput register staging in fast control paths |
| Output Drive | –32 mA IOH / +64 mA IOL - drives heavy capacitive loads or multiple TTL inputs without buffers |
| Propagation Delay | tPLH/tPHL ≤ 6.5 ns (typ. 4.5 ns) at 5 V, CL = 50 pF - ensures tight timing margins in synchronous designs |
| Operating Temperature | –40°C to +85°C - qualified for commercial and industrial ambient environments |
| Input Thresholds | VIH = 2.0 V, VIL = 0.8 V - fully interoperable with standard TTL logic families |
Pinout & Package
TSSOP-20 (PW) package: 6.95 mm × 4.4 mm × 1.2 mm body, 0.65 mm lead pitch, exposed pad not present, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CLKEN | Active-low clock enable - disables clocking when high, preventing spurious state changes |
| 2–9 | 1D–8D | Data inputs for each of eight flip-flops - sampled on next CLK↑ if CLKEN is low |
| 10 | GND | Ground reference - must be low-impedance return path for all switching currents |
| 11 | VCC | 5-V supply - decoupling capacitor required within 1 cm for stable high-speed operation |
| 12–19 | 1Q–8Q | Complementary registered outputs - retain state between clock edges, high-drive capable |
| 20 | CLK | Positive-edge-triggered clock input - edge-sensitive, not level-sensitive; immune to slow transitions |
Key Features
| Feature | Design Value |
|---|---|
| High-Drive Outputs | –32 mA IOH / +64 mA IOL - eliminates need for external bus drivers in dense logic interfaces |
| Low Ground Bounce | VOLP < 1 V at 5 V - minimizes noise coupling into adjacent signals during simultaneous switching |
| Latch-Up Immunity | >500 mA per JEDEC JESD-17 - ensures robustness in noisy industrial power environments |
| ESD Protection | >2000 V HBM, >200 V MM - withstands handling and board-level ESD events without damage |
| BiCMOS Process | EPIC-IIB - achieves TTL speed with CMOS-like static power efficiency (ICC < 250 µA) |
Applications
| Industrial PLC I/O Expansion | Test Equipment Pattern Generator |
|---|---|
Use Scenario: Expanding digital input/output capacity in programmable logic controllers using parallel backplane buses. IC Role / Device Role / Timing Role: Acts as an 8-bit synchronized input latch and output register, aligning sensor data and actuator commands to system clock domain. Use Value: Enables deterministic sampling and update timing across 8 channels with sub-7 ns propagation delay and 150-MHz clock tolerance. |
Use Scenario: Generating precise multi-bit stimulus waveforms for IC functional testing and boundary-scan validation. IC Role / Device Role / Timing Role: Stores and clocks out preloaded test vectors on each CLK↑ edge, controlled by external CLKEN for burst-mode sequencing. Use Value: Delivers glitch-free, edge-aligned 8-bit patterns with TTL-compatible drive strength to drive DUT pins directly. |
| Communications Backplane Buffer | Legacy Bus Interface Adapter |
Use Scenario: Isolating and retiming parallel address/data lines between mismatched clock domains on telecom backplanes. IC Role / Device Role / Timing Role: Serves as a synchronous interface buffer, absorbing skew and jitter between upstream controller and downstream peripherals. Use Value: Provides 2 ns setup time and 1.2 ns hold time margin, enabling reliable capture even with marginal signal integrity. |
Use Scenario: Adapting legacy 8-bit microprocessor buses (e.g., Z80, 8085) to modern FPGA-based controllers requiring registered handshaking. IC Role / Device Role / Timing Role: Captures and holds status or command bytes from CPU bus during WAIT cycles, releasing them synchronously to FPGA logic. Use Value: Eliminates metastability risk via guaranteed setup/hold compliance and supports direct connection to 5-V FPGA I/O banks. |
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 |
|---|---|---|---|
| SN74ABT574APWR | Octal D-type transparent latch (no clock enable); identical TSSOP-20 package and drive strength | Latch-based sampling instead of edge-triggered registration; requires separate enable strobe | Choose when asynchronous data capture is needed; avoid if strict CLK↑ synchronization is required |
| 74ACT377PWRE4 | Same function but ACT family: lower drive (–24/+24 mA), higher ICC (30 mA), same 150-MHz fmax | Higher power consumption and reduced fanout capability; less suitable for driving long traces or multiple loads | Prefer SN74ABT377APWR for high-drive, low-noise, or low-power-critical 5-V systems |
Compared with SN74ABT574APWR and 74ACT377PWRE4, the SN74ABT377APWR uniquely combines clock-enable control, 64-mA sink capability, and sub-7 ns propagation delay - making it optimal for noise-sensitive, high-fanout, edge-triggered register applications where timing precision and drive strength are jointly critical.
Availability
SN74ABT377APWR is available at Aetrix Electronics and suitable for industrial automation, test equipment, and communications infrastructure requiring stable component supply, long-term lifecycle support, and RoHS-compliant TSSOP packaging.
Supply support for SN74ABT377APWR 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, with over 50 years of innovation in high-reliability digital interface components.
The ABT logic family - including SN74ABT377APWR - was engineered for 5-V systems demanding high speed, strong drive, and noise immunity in industrial and instrumentation applications.
FAQ
What is the maximum clock frequency supported by SN74ABT377APWR?
The SN74ABT377APWR supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 5 V, TA = 25°C, CL = 50 pF). This rating is validated across the full industrial temperature range (–40°C to +85°C), with timing margins maintained via guaranteed setup (2 ns) and hold (1.2 ns) times.
Does SN74ABT377APWR require external pull-up or pull-down resistors on unused inputs?
Yes - per TI's SCBS156E datasheet Note 3, all unused inputs of SN74ABT377APWR must be held statically high or low to prevent floating states that could cause excessive ICC or unintended switching. CLKEN, D inputs, and CLK should never be left unconnected; tie-off resistors (e.g., 10 kΩ to VCC or GND) are recommended for unused D inputs.
What is the thermal performance of SN74ABT377APWR in its TSSOP-20 (PW) package?
The SN74ABT377APWR in TSSOP-20 (PW) package has a junction-to-ambient thermal resistance (θJA) of 128°C/W, as specified in the absolute maximum ratings table. This value assumes standard JEDEC PCB mounting (2-layer board, 1-in² copper). For sustained high-current operation, thermal relief via PCB copper pour under pin 10 (GND) and pin 11 (VCC) is advised.
Can SN74ABT377APWR drive standard TTL loads directly?
Yes - SN74ABT377APWR is explicitly designed for TTL compatibility. Its output drive strength (–32 mA IOH, +64 mA IOL) exceeds standard TTL requirements, allowing it to drive up to 10 standard TTL inputs (each requiring –1.6 mA IOH / +0.4 mA IIL) without external buffers, while maintaining VOH ≥ 2.0 V and VOL ≤ 0.55 V.
Is SN74ABT377APWR pin-compatible with other members of the ABT377 family?
Yes - SN74ABT377APWR shares identical pinout and logic functionality with all SN74ABT377A variants (e.g., SN74ABT377ADBR, SN74ABT377ADWR) in the same package type. The PW (TSSOP-20) footprint matches TI's documented PW0020A outline, and the pin assignments (CLKEN, D1–D8, GND, VCC, Q1–Q8, CLK) are consistent across all TSSOP-packaged ABT377A devices.
SN74ABT377APWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm 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:
- 150 MHz
- Max Propagation Delay @ V, Max CL:
- 6.8ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 250 µA
- Input Capacitance:
- 3.5 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74ABT377APWR FAQ
1.How can I place an order for SN74ABT377APWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT377APWR 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 SN74ABT377APWR reliable?
The price and inventory of SN74ABT377APWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT377APWR is usually 5 days.
3.What payment methods are accepted for SN74ABT377APWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT377APWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT377APWR?
SN74ABT377APWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT377APWR 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 SN74ABT377APWR?
For technical support, including SN74ABT377APWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT377APWR requirements.
6.How does Aetrix verify that SN74ABT377APWR is sourced from the original manufacturer or authorized distributors?
All SN74ABT377APWR 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 SN74ABT377APWR meets industry standards.
7.What is the process for return or replacement of SN74ABT377APWR?
All SN74ABT377APWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT377APWR, 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 SN74ABT377APWR part is unused and in its original packaging.
Return procedure for SN74ABT377APWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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