My Inquiry
My Account
Texas Instruments SN74AS576DW
- Part No.:
- SN74AS576DW
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74AS576DW.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,275
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74AS576DW from Texas Instruments is an octal D-type edge-triggered flip-flop with 3-state inverting outputs, designed for direct bus driving in digital systems. It features buffered control inputs, bus-structured pinout, and operates from 0°C to 70°C at 4.5–5.5 V supply. Key confirmed parameters include 125 MHz max clock frequency, 32 mA low-level output drive, and 15 ns setup time before CLK↑.
For engineers reviewing the SN74AS576DW datasheet, SN74AS576DW pinout, SN74AS576DW application, or SN74AS576DW equivalent, this page delivers verified functional identity, timing behavior under load, bus-drive capability, thermal operating range, and validated drop-in alternatives for legacy TTL bus interface designs.
Technical Context
This device implements eight independent D-type latches triggered on the low-to-high clock transition, each with individually controllable 3-state inverting outputs. Internal operation remains unaffected by OE state-data can be latched or retained while outputs are disabled.
It belongs to the AS (Advanced Schottky) logic family, delivering higher speed and lower power than ALS variants: fmax = 125 MHz vs. 30 MHz for SN74ALS576B, with tPLH/tPHL ≤ 8 ns and tPZH/tPHZ ≤ 6 ns under 50 pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | AS (Advanced Schottky) - enables 125 MHz operation with reduced propagation delay vs. ALS. |
| Max Clock Frequency | 125 MHz - supports high-speed synchronous data capture in bus register applications. |
| Output Drive (IOL) | 48 mA - sufficient to drive multiple TTL loads or terminated transmission lines directly. |
| Setup Time (tsu) | 2 ns - minimal data hold before CLK↑, easing timing closure in fast bus cycles. |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade industrial and computing environments. |
| Supply Voltage Range | 4.5 V to 5.5 V - compatible with standard 5 V TTL/CMOS mixed-signal systems. |
| 3-State Enable Delay (tPHZ) | ≤ 6 ns - ensures rapid bus release for time-critical arbitration or multiplexing. |
Pinout & Package
SN74AS576DW uses a 20-pin SOIC (DW) package, 7.5 mm × 12.8 mm body, 1.27 mm pitch, 2.65 mm max height, RoHS-compliant NIPDAU lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE (Output Enable) | Active-low 3-state control; does not affect internal latch state during disable. |
| 2–9 | 1D–8D | Data inputs for eight D-type flip-flops; sampled on CLK↑. |
| 10 | GND | Ground reference for all logic and output stages. |
| 11–18 | 1Q–8Q | Inverting 3-state outputs; high-impedance when OE = HIGH. |
| 19 | VCC | Positive supply (4.5–5.5 V); powers internal logic and output drivers. |
| 20 | CLK | Clock input; triggers simultaneous data capture across all eight channels on rising edge. |
Key Features
| Feature | Design Value |
|---|---|
| Bus-structured pinout | Minimizes PCB trace crossovers and simplifies layout for parallel data paths (D0–D7 adjacent to Q0–Q7). |
| Buffered control inputs | Reduces capacitive loading on OE and CLK nets, improving signal integrity in high-fanout bus systems. |
| 3-state inverting outputs | Enables bidirectional bus sharing without external inverters; supports wired-OR and contention-free arbitration. |
| Independent output enable | Allows data retention or new sampling while outputs remain tri-stated-critical for glitch-free bus handoff. |
| AS-family speed-power balance | Delivers 125 MHz operation with ICC ≤ 135 mA (outputs low), outperforming ALS while maintaining TTL compatibility. |
Applications
| Backplane Data Register | Industrial I/O Port Buffer |
|---|---|
|
Use Scenario: Latching parallel sensor data from 8-channel ADCs into a shared backplane bus for CPU readout. IC Role / Device Role / Timing Role: Octal D-flip-flop synchronizing asynchronous analog conversion results to system clock domain; 3-state outputs isolate bus during CPU access. Use Value: 2 ns setup time and 6 ns output enable/disable ensure reliable capture and release within tight backplane timing windows. |
Use Scenario: Isolating microcontroller GPIO pins from noisy 24 V industrial fieldbus lines using level-shifted buffers. IC Role / Device Role / Timing Role: Bus driver providing 48 mA sink current per channel to drive optocouplers or relay drivers; OE controlled by MCU for dynamic port direction switching. Use Value: 48 mA IOL eliminates need for external transistor arrays; inverting outputs simplify active-low control logic. |
| Legacy System Bus Extender | Test Equipment Pattern Generator |
|
Use Scenario: Extending data bus width between vintage 8-bit CPUs and peripheral cards in retro-computing restoration projects. IC Role / Device Role / Timing Role: Bidirectional bus driver implementing transparent register functionality; CLK synchronized to CPU RD/WR strobes. Use Value: Pin-compatible replacement for obsolete 74S/74LS576; 125 MHz margin accommodates overclocked vintage buses. |
Use Scenario: Generating precise 8-bit parallel stimulus patterns for IC functional testing under automated test equipment (ATE) control. IC Role / Device Role / Timing Role: High-speed pattern latch holding test vectors; OE gated by ATE sequencer to inject bursts onto DUT bus. Use Value: 6 ns tPHZ/tPLZ enables sub-10 ns pattern update resolution; 50 pF load-rated timing guarantees repeatability across fixtures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type bus register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ALS576BDW | ALS family: 30 MHz max clock, 24 mA IOL, 14 ns tPLH, higher power supply current (ICC ≤ 24 mA). | Lower speed and drive; suitable only where timing budget allows ≥14 ns propagation or <30 MHz operation. | Select when legacy ALS compatibility or lower power consumption (vs. AS) is prioritized over speed. |
| SN74AS576N | Identical electrical specs and logic function; differs only in 20-pin PDIP (N) through-hole package instead of SOIC (DW). | Requires through-hole PCB assembly; not suitable for surface-mount-only production or space-constrained layouts. | Choose for prototyping, repair, or legacy through-hole systems where SOIC footprint is unavailable. |
Compared with SN74ALS576BDW, SN74AS576DW delivers 4× higher clock rate and 2× stronger output drive-critical for modern bus extensions-while SN74AS576N offers identical performance in a through-hole form factor for design continuity or manual assembly.
Availability
SN74AS576DW is available at Aetrix Electronics and suitable for industrial I/O buffering, legacy system bus extension, and high-speed test pattern generation requiring stable component supply across long-lifecycle programs.
Supply support for SN74AS576DW 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 for industrial, automotive, and communications markets.
The SN74AS576DW belongs to TI's Advanced Schottky (AS) logic product line, engineered for high-speed, low-latency bus interface and data latching in commercial-grade digital systems.
FAQ
What is the maximum clock frequency supported by SN74AS576DW?
The SN74AS576DW supports a maximum clock frequency of 125 MHz under recommended operating conditions (VCC = 4.5–5.5 V, CL = 50 pF, TA = 0°C to 70°C). This value is characterized but not production-tested per MIL-STD-883 Class B requirements, and represents the highest guaranteed toggle rate for reliable data capture across all eight channels in the SN74AS576DW.
Does SN74AS576DW have a synchronous clear (CLR) input?
No, the SN74AS576DW does not include a synchronous clear input. That function is present only in the SN74ALS577A variant. The SN74AS576DW implements eight independent D-type flip-flops with clocked data capture and 3-state output control via OE, but no dedicated reset line-system-level reset must be handled externally or via OE gating.
What is the output polarity of SN74AS576DW?
The SN74AS576DW provides inverting 3-state outputs: when enabled (OE = LOW), Qn = NOT(Dn); when disabled (OE = HIGH), all outputs enter high-impedance state regardless of internal latch value. This inversion is inherent to the device architecture and documented in the function table and logic diagrams of the SN74AS576DW datasheet.
Can SN74AS576DW operate at 3.3 V supply voltage?
No, the SN74AS576DW is specified only for 4.5 V to 5.5 V supply operation. Its input thresholds (VIH = 2 V, VIL = 0.8 V) and output voltage levels (VOH ≥ 2.4 V at IOH = −12 mA) are designed for 5 V TTL compatibility. Operation below 4.5 V is outside recommended conditions and may result in unreliable switching or increased propagation delay in the SN74AS576DW.
Is SN74AS576DW pin-compatible with SN74ALS576BDW?
Yes, SN74AS576DW and SN74ALS576BDW share identical 20-pin SOIC (DW) packages and fully compatible pinouts-including OE, CLK, D0–D7, Q0–Q7, VCC, and GND assignments. However, due to differing AC characteristics and drive strength, timing validation is required when substituting SN74AS576DW for SN74ALS576BDW in existing designs.
SN74AS576DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AS
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, 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:
- 15mA, 48mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 125 mA
- Input Capacitance:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74AS576DW FAQ
1.How can I place an order for SN74AS576DW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AS576DW 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 SN74AS576DW reliable?
The price and inventory of SN74AS576DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AS576DW is usually 5 days.
3.What payment methods are accepted for SN74AS576DW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AS576DW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AS576DW?
SN74AS576DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AS576DW 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 SN74AS576DW?
For technical support, including SN74AS576DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AS576DW requirements.
6.How does Aetrix verify that SN74AS576DW is sourced from the original manufacturer or authorized distributors?
All SN74AS576DW 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 SN74AS576DW meets industry standards.
7.What is the process for return or replacement of SN74AS576DW?
All SN74AS576DW units undergo pre-shipment inspection (PSI). If there is an issue with SN74AS576DW, 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 SN74AS576DW part is unused and in its original packaging.
Return procedure for SN74AS576DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74AS576DW 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…
