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Texas Instruments SN74ABT374DBLE
- Part No.:
- SN74ABT374DBLE
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
SN74ABT374DBLE.pdf
- Description:
- BUS DRIVER, ABT SERIES, 8-BIT
- Quantity:
- Payment:
- Shipping:
Inventory:9,000
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Product details
Overview
SN74ABT374DBLE from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs in a 20-pin SSOP (DB) package. It operates at 4.5–5.5 V, delivers ±32 mA high-drive outputs, supports 150 MHz clock frequency, and features low propagation delay (tPLH/tPHL ≤ 6.2 ns). It is used for bidirectional bus driving and I/O port buffering in industrial digital systems.
For engineers reviewing the SN74ABT374DBLE datasheet, SN74ABT374DBLE pinout, SN74ABT374DBLE application, or SN74ABT374DBLE equivalent, key selection criteria include 3-state output timing (tPZH/tPHZ ≤ 5.2 ns), latch-up immunity (>500 mA), output ground bounce (<1 V), and compatibility with 5-V TTL/CMOS buses requiring high fan-out and bus contention control.
Technical Context
This device implements eight independent positive-edge-triggered D flip-flops with asynchronous 3-state output control via OE. Each flip-flop captures D-input logic on CLK↑ and holds state until next clock edge, while OE independently places all Q outputs into high-impedance without affecting internal storage.
Its EPIC-IIB BiCMOS process enables high-speed switching (fMAX = 150 MHz) with low power dissipation and robust ESD protection (>2000 V HBM). The design supports hot-swap-capable bus interfaces by allowing data retention during output disable and eliminating need for external pull-ups when OE is tied to VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL logic rails and noise margin compliance. |
| Output Drive | –32 mA IOH / 64 mA IOL - drives heavy capacitive loads (e.g., >50 pF buses) without signal degradation. |
| Max Clock Frequency | 150 MHz - supports high-throughput data latching in memory interfaces and address/data multiplexing. |
| Propagation Delay | tPLH/tPHL ≤ 6.2 ns @ VCC = 5 V - enables tight timing budgets in synchronous bus architectures. |
| 3-State Enable Time | tPZH ≤ 5.2 ns - allows rapid bus arbitration and fast turnaround between read/write cycles. |
| Latch-Up Immunity | >500 mA per JEDEC JESD-17 - guarantees robust operation in noisy industrial environments with supply transients. |
| ESD Protection | >2000 V HBM - meets MIL-STD-883 requirements for handling and board-level reliability. |
Pinout & Package
The SN74ABT374DBLE is housed in a 20-pin Shrink Small-Outline Package (SSOP, DB), measuring 7.5 mm × 5.6 mm × 1.75 mm, with 0.65 mm lead pitch and gull-wing leads suitable for surface-mount reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE (Output Enable) | Active-low control that places all eight Q outputs in high-impedance state; does not affect internal flip-flop operation. |
| 2–9, 11–18 | D1–D8, Q1–Q8 | Paired data inputs and registered outputs; each D→Q path is edge-triggered on CLK↑. |
| 10 | GND | Power ground reference for all logic and output stages; must be low-impedance for stable VOL/VOLP. |
| 19 | CLK | Global positive-edge clock input synchronizing all eight flip-flops simultaneously. |
| 20 | VCC | 5-V supply rail powering both BiCMOS logic core and high-drive output buffers. |
Key Features
| Feature | Design Value |
|---|---|
| High-Drive 3-State Outputs | –32 mA IOH / 64 mA IOL enables direct connection to unterminated 50-pF+ buses without interface components. |
| Low Output Ground Bounce | VOLP < 1 V at VCC = 5 V ensures signal integrity during simultaneous output switching in dense PCB layouts. |
| State-of-the-Art EPIC-IIB BiCMOS | Combines CMOS input stage with bipolar output drivers for speed/power optimization in 5-V systems. |
| Robust Latch-Up Immunity | Exceeds 500 mA per JEDEC JESD-17 - eliminates risk of destructive latch-up under transient overvoltage conditions. |
| Hot-Swap Bus Control | OE can be toggled asynchronously while CLK/D remain active, enabling dynamic bus sharing without data loss. |
Applications
| Industrial PLC I/O Modules | Backplane Data Buffers |
|---|---|
Use Scenario: Isolating and latching sensor/actuator signals in modular programmable logic controllers with shared backplane buses. IC Role / Device Role / Timing Role: Acts as synchronized input register and output driver, capturing field data on CLK↑ and presenting it to the CPU bus only when enabled by system-level OE control. Use Value: Eliminates need for discrete bus transceivers and pull-up networks, reducing BOM count and improving timing predictability across 8-bit parallel I/O channels. | Use Scenario: Driving high-capacitance motherboard traces between processor and peripheral slots in legacy industrial computers. IC Role / Device Role / Timing Role: Functions as bidirectional bus latch-holding CPU address/data during memory access cycles and releasing bus to peripherals when OE is asserted. Use Value: Supports 150 MHz operation with sub-7 ns propagation delay, meeting strict setup/hold timing for ISA-compatible expansion interfaces. |
| Memory Interface Registers | Legacy Display Controller Buffers |
Use Scenario: Synchronizing asynchronous SRAM or Flash memory access in microcontroller-based embedded systems. IC Role / Device Role / Timing Role: Captures write data on rising CLK edge and presents stable outputs to memory address/data lines, decoupling MCU timing from memory access latency. Use Value: Enables reliable 5-V memory interfacing with 2.5 ns data setup time and 2.1 ns hold time, preventing metastability in mixed-speed designs. | Use Scenario: Buffering pixel data and control signals between FPGA video generators and analog RGB DACs in industrial HMIs. IC Role / Device Role / Timing Role: Provides glitch-free 3-state isolation between video pipeline stages, allowing dynamic reconfiguration of display resolution or color depth without bus contention. Use Value: Delivers 64 mA sink current per output to drive 75-Ω coaxial video lines directly, avoiding external line drivers in cost-sensitive panel designs. |
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 |
|---|---|---|---|
| SN74ABT244DBR | Octal buffer (non-latching), no clock or D-register functionality; identical 3-state drive specs. | Suitable only for transparent data pass-through, not for synchronous sampling or storage. | Select when bus buffering without edge-triggered capture is required; not a functional replacement for SN74ABT374DBLE. |
| SN74ACT374DBR | TTL-compatible 5-V CMOS version; lower drive (–24 mA/24 mA), higher tPLH (7.5 ns), same pinout and function. | Used where lower power and reduced ground bounce are prioritized over maximum speed and drive strength. | Drop-in compatible for less demanding timing or lower-current applications; verify VOL/VOLP margins in high-noise environments. |
Compared with SN74ABT244DBR, SN74ABT374DBLE adds edge-triggered storage essential for synchronous systems; compared with SN74ACT374DBR, it provides +33% output drive and ~15% faster propagation, making it preferable for high-speed, high-fanout bus interfaces where timing closure is critical.
Availability
SN74ABT374DBLE is available at Aetrix Electronics and suitable for industrial PLC I/O modules, backplane data buffers, memory interface registers, and legacy display controller buffers requiring stable component supply and long-term obsolescence management.
Supply support for SN74ABT374DBLE 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 SN74ABT374DBLE belongs to TI's ABT logic family, engineered for high-speed 5-V bus interfacing with robust noise immunity and hot-swap capability in mission-critical industrial control systems.
FAQ
What is the operating temperature range for SN74ABT374DBLE?
The SN74ABT374DBLE is characterized for operation from –40°C to 85°C, matching the SN74ABT374A specification. This commercial-grade range supports deployment in industrial enclosures, factory automation equipment, and non-military embedded systems where extended thermal stability is required but full military-grade operation is unnecessary. The SN74ABT374DBLE shares this rating with other DB-package variants like SN74ABT374ADBR.
Does SN74ABT374DBLE support hot-swap operation?
Yes, SN74ABT374DBLE supports hot-swap operation through its independently controlled OE input. When OE is asserted (low), all Q outputs enter high-impedance without disrupting internal flip-flop states, allowing safe insertion/removal from live 5-V buses. TI recommends tying OE to VCC via a pullup resistor during power-up to ensure default high-Z state, preventing bus contention before system initialization completes.
What is the maximum capacitive load SN74ABT374DBLE can drive reliably?
SN74ABT374DBLE is specified for CL = 50 pF in switching characteristics tables, with propagation delays (tPLH/tPHL ≤ 6.2 ns) and output drive (64 mA IOL) validated under that condition. While it can drive higher capacitance due to its high-current outputs, signal integrity degrades beyond 50 pF without careful layout-trace length, termination, and ground plane design become critical. For >50 pF loads, empirical validation using the actual PCB stack-up and routing is recommended.
Is SN74ABT374DBLE pin-compatible with other ABT-series octal flip-flops?
Yes, SN74ABT374DBLE shares identical 20-pin DB package pinout and logic function with SN74ABT374ADBR, SN74ABT374ADBRG4, and SN74ABT374ADW. All use the same OE/CLK/D/Q/GND/VCC assignment per TI's SCBS111G datasheet. However, SN74ABT374DBLE is marked OBSOLETE in TI's packaging addendum, so active alternatives like SN74ABT374ADBR are recommended for new designs.
How does the EPIC-IIB BiCMOS process benefit SN74ABT374DBLE performance?
The EPIC-IIB BiCMOS process in SN74ABT374DBLE integrates CMOS input stages with bipolar output drivers, achieving significantly lower power dissipation than pure bipolar logic while maintaining high-speed performance (150 MHz fMAX) and strong output drive (–32 mA/64 mA). This architecture reduces switching noise and improves noise immunity-key for stable operation in electrically noisy industrial settings where SN74ABT374DBLE is commonly deployed.
SN74ABT374DBLE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Type:
- -
- Output Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- -
- Trigger Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Current - Quiescent (Iq):
- -
- Input Capacitance:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SN74ABT374DBLE FAQ
1.How can I place an order for SN74ABT374DBLE through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT374DBLE 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 SN74ABT374DBLE reliable?
The price and inventory of SN74ABT374DBLE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT374DBLE is usually 5 days.
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SN74ABT374DBLE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT374DBLE 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 SN74ABT374DBLE?
For technical support, including SN74ABT374DBLE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT374DBLE requirements.
6.How does Aetrix verify that SN74ABT374DBLE is sourced from the original manufacturer or authorized distributors?
All SN74ABT374DBLE 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 SN74ABT374DBLE meets industry standards.
7.What is the process for return or replacement of SN74ABT374DBLE?
All SN74ABT374DBLE units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT374DBLE, 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 SN74ABT374DBLE part is unused and in its original packaging.
Return procedure for SN74ABT374DBLE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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