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Texas Instruments SN74ABT574ANG4
- Part No.:
- SN74ABT574ANG4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74ABT574ANG4.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,633
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Product details
Overview
SN74ABT574ANG4 from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for high-speed bus interface and data latching in 5-V TTL-compatible systems. It features 8-bit positive-edge clocking, ±32-mA/±64-mA output drive, Ioff partial-power-down support, and operates from −40°C to 85°C in a 20-pin PDIP package.
For engineers reviewing the SN74ABT574ANG4 datasheet, SN74ABT574ANG4 pinout, SN74ABT574ANG4 application, or SN74ABT574ANG4 equivalent, this device is selected for high-drive bidirectional bus buffering, I/O port expansion, and noise-immune register storage where ground bounce <1 V and latch-up >500 mA are critical.
Technical Context
This device implements eight independent D-type flip-flops synchronized to the rising edge of CLK, with asynchronous 3-state control via OE. Internal circuitry ensures data retention during output disable, and Ioff protection blocks current backflow when VCC = 0.
It delivers high-current drive (−32 mA IOH, 64 mA IOL) into capacitive loads while maintaining tight timing: tSU = 1 ns (low), tH = 1.8 ns, and fMAX = 150 MHz at VCC = 5 V. Output ground bounce is specified <1 V under switching conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | ABT (Advanced BiCMOS TTL) - enables 5-V operation with TTL input thresholds and CMOS-level output swing. |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5-V digital rails; supports stable operation across industrial temperature range. |
| Output Drive | −32 mA IOH / 64 mA IOL - drives heavy capacitive buses directly without external buffers or pull-ups. |
| Propagation Delay | tPLH/tPHL ≤ 6.8 ns - ensures sub-7-ns timing margin for 150-MHz clocked systems at VCC = 5 V. |
| Ioff Support | ±100 μA max Ioff at VCC = 0 - prevents damaging backflow during hot-insertion or partial power-down sequences. |
| ESD Rating | 2000-V HBM, 200-V MM - meets JEDEC JESD22-A114/A115 for robust handling in manufacturing and field environments. |
| Latch-Up Immunity | >500 mA per JEDEC JESD17 - guarantees survivability under transient overcurrent events on I/O lines. |
Pinout & Package
SN74ABT574ANG4 uses a 20-pin plastic dual in-line package (PDIP-N), 7.62 mm pitch, 25.4 mm body length, with pin 1 index notch and standard through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–8, 11–18 | Data inputs (1D–8D) and outputs (1Q–8Q) | Eight parallel D/Q channels; each pair forms one edge-triggered register stage with independent 3-state control. |
| 9 | GND | Power return reference for all logic and output stages; must be low-inductance connected to system ground plane. |
| 10 | VCC | 5-V supply input; requires local 0.1-μF ceramic decoupling adjacent to pin to suppress switching noise. |
| 19 | CLK | Positive-edge clock input; triggers simultaneous capture of all eight D inputs into Q outputs on rising transition. |
| 20 | OE | Active-low 3-state enable; asserts high-impedance outputs without affecting internal flip-flop state or clock operation. |
Key Features
| Feature | Design Value |
|---|---|
| High-Drive Outputs | Delivers −32 mA (sourcing) and 64 mA (sinking) to drive long PCB traces, multiple loads, or unterminated buses without signal degradation. |
| Ioff Partial-Power-Down | Disables outputs and blocks reverse current flow when VCC = 0, enabling safe insertion/removal in live backplanes or mixed-voltage systems. |
| Low Ground Bounce | VOLP <1 V at VCC = 5 V, TA = 25°C - minimizes noise coupling into shared ground paths during simultaneous output switching. |
| Robust ESD/Latch-Up | 2000-V HBM ESD and >500 mA latch-up immunity - exceeds JEDEC standards for reliability in industrial and telecom infrastructure. |
| Wide Temp Range | −40°C to +85°C operating range - qualified for use in extended-temperature industrial control, test equipment, and embedded computing. |
Applications
| Industrial Bus Interface | Microcontroller I/O Expansion |
|---|---|
Use Scenario: Isolating and driving a 5-V parallel address/data bus between a microcontroller and legacy peripherals (e.g., EPROM, LCD controller). IC Role / Device Role / Timing Role: Acts as a registered bus transceiver - captures data on CLK↑ and presents it to the bus only when OE is asserted, eliminating contention. Use Value: Eliminates need for discrete pull-up resistors or buffer ICs due to 64-mA sink capability and 3-state isolation. |
Use Scenario: Expanding GPIO count on an MCU with limited native I/O, such as in programmable logic controllers or sensor concentrators. IC Role / Device Role / Timing Role: Functions as an 8-bit output latch - holds steady-state signals while freeing MCU pins for other functions; updated synchronously on CLK edge. Use Value: Provides deterministic timing (tSU = 1 ns, tH = 1.8 ns) and noise immunity (VOLP <1 V) for reliable peripheral control in electrically noisy factory environments. |
| Bidirectional Data Buffering | Working Register Storage |
Use Scenario: Implementing a shared memory interface between two processors or DMA engines sharing a common 8-bit data path. IC Role / Device Role / Timing Role: Serves as a direction-controlled register - OE selects read/write direction, CLK samples or presents data on bus edges. Use Value: Enables full-duplex handshaking with no external logic; high-drive strength prevents bus collapse during concurrent access attempts. |
Use Scenario: Storing intermediate computation results or status flags in real-time control firmware (e.g., motor phase sequencing, PWM duty cycle staging). IC Role / Device Role / Timing Role: Operates as a synchronous working register - retains values across clock cycles and updates only on valid CLK↑ transitions. Use Value: Guarantees glitch-free state transitions and eliminates metastability risk via edge-triggered D-flip-flop architecture. |
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 |
|---|---|---|---|
| SN74ABT574ADWR | Same ABT logic family, SOIC-DW package (20-pin), tape-and-reel packaging; identical electrical specs and timing. | Suitable for automated SMT assembly; lacks through-hole mounting but offers lower profile and thermal resistance (θJA = 58°C/W). | Select when board space, reflow compatibility, or volume production favor surface-mount over through-hole. |
| SN74LV574APWR | LV-CMOS family, 2.7–5.5 V supply, lower drive (−12 mA/12 mA), higher tSU (2.5 ns), and reduced ESD rating (1500-V HBM). | Applicable in mixed-voltage or low-power systems where 5-V drive strength is not required; not suitable for high-noise or high-capacitance buses. | Choose only if supply voltage flexibility or static power reduction outweighs need for 64-mA drive and industrial-grade robustness. |
Compared with SN74ABT574ADWR, SN74ABT574ANG4 provides direct through-hole prototyping and legacy board compatibility; versus SN74LV574APWR, it delivers 5× higher output current and superior noise immunity-critical for industrial bus integrity.
Availability
SN74ABT574ANG4 is available at Aetrix Electronics and suitable for industrial bus interface, microcontroller I/O expansion, bidirectional data buffering, and working register storage requiring stable component supply across extended temperature ranges and high-reliability environments.
Supply support for SN74ABT574ANG4 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 decades of experience in high-reliability industrial and automotive IC design.
The SN74ABT574A product line was engineered for high-speed, high-drive 5-V TTL-compatible bus interfacing-targeting applications demanding noise resilience, latch-up immunity, and seamless integration with legacy digital systems.
FAQ
What is the maximum clock frequency supported by SN74ABT574ANG4?
The SN74ABT574ANG4 supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 5 V, TA = 25°C). Its propagation delays (tPLH/tPHL ≤ 6.8 ns) and setup/hold times (tSU = 1 ns, tH = 1.8 ns) ensure reliable operation at this rate in properly terminated 5-V systems.
Does SN74ABT574ANG4 support partial power-down operation?
Yes, SN74ABT574ANG4 includes Ioff circuitry that disables outputs and limits reverse current to ±100 μA when VCC = 0, enabling safe partial-power-down operation in mixed-supply or hot-swap systems without damaging backflow.
What is the output drive capability of SN74ABT574ANG4?
SN74ABT574ANG4 provides high-drive outputs rated at −32 mA (IOH) and 64 mA (IOL) at VCC = 5 V. This allows direct driving of heavily loaded or high-capacitance buses without external buffers, reducing BOM count and layout complexity.
How does SN74ABT574ANG4 handle ground bounce during switching?
SN74ABT574ANG4 specifies typical output ground bounce (VOLP) <1 V at VCC = 5 V and TA = 25°C. This low bounce level minimizes noise coupling into shared ground planes, preserving signal integrity in dense, multi-channel digital systems.
Is SN74ABT574ANG4 pin-compatible with other packages in the SN74ABT574A family?
SN74ABT574ANG4 (PDIP-N) shares identical pinout and logic function with SN74ABT574A variants in SOIC-DW, SSOP-DB, TSSOP-PW, and SOP-NS packages. However, mechanical dimensions, thermal performance, and mounting methods differ-PCB layout must match the specific package footprint.
SN74ABT574ANG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 200 MHz
- Max Propagation Delay @ V, Max CL:
- 6.6ns @ 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:
- Through Hole
- Supplier Device Package:
- 20-PDIP
SN74ABT574ANG4 FAQ
1.How can I place an order for SN74ABT574ANG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT574ANG4 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 SN74ABT574ANG4 reliable?
The price and inventory of SN74ABT574ANG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT574ANG4 is usually 5 days.
3.What payment methods are accepted for SN74ABT574ANG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT574ANG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT574ANG4?
SN74ABT574ANG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT574ANG4 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 SN74ABT574ANG4?
For technical support, including SN74ABT574ANG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT574ANG4 requirements.
6.How does Aetrix verify that SN74ABT574ANG4 is sourced from the original manufacturer or authorized distributors?
All SN74ABT574ANG4 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 SN74ABT574ANG4 meets industry standards.
7.What is the process for return or replacement of SN74ABT574ANG4?
All SN74ABT574ANG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT574ANG4, 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 SN74ABT574ANG4 part is unused and in its original packaging.
Return procedure for SN74ABT574ANG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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