My Inquiry
My Account
Texas Instruments SN74ALS576BNS
- Part No.:
- SN74ALS576BNS
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
SN74ALS576BNS.pdf
- Description:
- IC D-TYPE POS TRG SNGL 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:6,095
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74ALS576BNS from Texas Instruments is an octal D-type edge-triggered flip-flop with 3-state inverting outputs, designed for bus driving in digital systems. It features bus-structured pinout, buffered control inputs, and operates over 0°C to 70°C with 5 V supply. It enters data on the low-to-high clock transition and supports bidirectional bus interfacing in I/O ports and buffer registers.
For engineers reviewing the SN74ALS576BNS datasheet, SN74ALS576BNS pinout, SN74ALS576BNS application, or SN74ALS576BNS equivalent, key selection criteria include its 3-state inverting output architecture, 30 MHz maximum clock frequency, 24 mA low-level output drive, and compatibility with standard TTL logic levels in industrial bus interface designs.
Technical Context
This device implements eight independent D-type latches synchronized to the rising edge of CLK, each with individually controllable 3-state outputs via OE. Internal operations continue regardless of OE state-data can be latched while outputs remain high-impedance.
The SN74ALS576BNS uses ALS (Advanced Low-Power Schottky) bipolar technology, delivering improved speed-power trade-offs versus standard LS logic: 14 ns typical propagation delay (tPLH/tPHL), 18 ns max enable/disable times, and guaranteed operation up to 30 MHz at VCC = 4.5–5.5 V and CL = 50 pF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | ALS (Advanced Low-Power Schottky) - enables higher speed than LS with lower power consumption |
| Function | Octal D-type edge-triggered flip-flop with 3-state inverting outputs - provides latch + bus isolation in one package |
| Max Clock Frequency | 30 MHz - supports high-speed synchronous data capture in bus-controlled systems |
| Output Drive | IOL = 24 mA / IOH = −2.6 mA - sufficient to directly drive standard TTL loads without external buffers |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade embedded and industrial control applications |
| Supply Voltage | 4.5 V to 5.5 V - compatible with regulated 5 V rails and tolerant of minor supply variation |
| Propagation Delay | tPLH/tPHL ≤ 14 ns - ensures tight timing margins in high-frequency address/data latching |
Pinout & Package
SOP-20 (NS) package: 20-pin small-outline plastic package with gull-wing leads, 1.27 mm pitch, 7.6 mm × 12.8 mm body, RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Data Inputs (1D–8D) | Asynchronous parallel data inputs latched on CLK↑; direct connection to upstream data sources |
| 9 | GND | Power ground reference for all internal circuitry and output drivers |
| 10 | VCC | +5 V supply rail; decoupling capacitor required adjacent to pin for noise suppression |
| 11, 12, 13, 14, 15, 16, 17, 18 | Inverted 3-State Outputs (1Q–8Q) | Active-low latched outputs; high-impedance when OE = HIGH - enables shared bus arbitration |
| 19 | CLK | Clock input triggering edge-sensitive latching on rising edge only |
| 20 | OE | Output-enable control; LOW enables outputs, HIGH disables all Q pins to high-Z - no effect on internal latch state |
Key Features
| Feature | Design Value |
|---|---|
| Bus-structured pinout | Input/output pairing (e.g., 1D/1Q adjacent) minimizes trace crossovers and simplifies PCB layout for parallel bus routing |
| Buffered control inputs | CLK and OE inputs include Schottky-clamped buffers - improves noise immunity and reduces sensitivity to slow-rising signals |
| Independent output disable | OE assertion does not disrupt internal latch state - allows data retention during bus contention or reconfiguration |
| ALS process optimization | Delivers 30 MHz operation with ICC ≤ 30 mA (outputs disabled) - balances speed, power, and thermal performance in dense logic arrays |
| Standard 5 V TTL compatibility | VIH = 2.0 V / VIL = 0.8 V thresholds ensure interoperability with legacy 74LS/74F logic families without level-shifting |
Applications
| Industrial PLC I/O Modules | Legacy Bus Interface Adapters |
|---|---|
Use Scenario: Isolating microcontroller GPIOs from noisy 24 V field-side bus lines in programmable logic controller backplanes. IC Role / Device Role / Timing Role: SN74ALS576BNS acts as a synchronized input latch and 3-state bus driver, capturing sensor status on CLK↑ and presenting it to the CPU data bus only when OE is asserted. Use Value: Prevents bus contention during CPU read cycles and eliminates metastability via edge-triggered sampling - critical for deterministic scan-cycle timing in real-time control. | Use Scenario: Bridging ISA or VMEbus data paths between older 8-bit processors and modern FPGA-based peripheral controllers. IC Role / Device Role / Timing Role: SN74ALS576BNS serves as a direction-controlled bidirectional data register, latching write data from CPU and gating read data to CPU using OE and CLK coordination. Use Value: Enables cycle-accurate handshaking without additional glue logic - preserves original bus protocol timing while supporting mixed-technology system upgrades. |
| Test Equipment Data Acquisition | Automated Test Fixture Controllers |
Use Scenario: Capturing parallel digital test vectors from pattern generators into high-speed digitizers with precise synchronization. IC Role / Device Role / Timing Role: SN74ALS576BNS functions as a strobed input sampler, aligning asynchronous stimulus edges to a master system clock before forwarding to ADC interface logic. Use Value: Reduces setup/hold violations at downstream interfaces by providing clean, jitter-free sampled data - improves measurement repeatability in production test environments. | Use Scenario: Managing relay bank addressing and status feedback in automated functional test fixtures with multiple DUT slots. IC Role / Device Role / Timing Role: SN74ALS576BNS operates as a dual-purpose register: latching relay control bits from host controller and buffering DUT response signals onto shared status bus. Use Value: Eliminates need for separate input/output transceivers - reduces BOM count and board area while maintaining signal integrity across long fixture harnesses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type 3-state flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ALS577ADWR | Includes synchronous clear (CLR) input; 24-pin SOIC package; same ALS family, identical timing specs | Required where global reset of all latches is needed prior to data acquisition cycles | Select SN74ALS577ADWR only if synchronous initialization is mandatory; otherwise SN74ALS576BNS offers pin-compatible simplicity in 20-pin footprint |
| SN74AS576N | Faster AS family: 125 MHz max clock, lower propagation delay (8 ns typ), higher drive (IOL = 48 mA), but higher ICC (135 mA) | Suitable for ultra-high-speed bus arbitration where ALS timing margins are insufficient | Choose SN74AS576N when >30 MHz operation or sub-10 ns timing is required; accept higher power and reduced noise margin versus SN74ALS576BNS |
Compared with SN74ALS577ADWR, SN74ALS576BNS saves board space and eliminates unnecessary reset logic; compared with SN74AS576N, it delivers adequate speed at lower power and better noise immunity for commercial-grade bus interfaces.
Availability
SN74ALS576BNS is available at Aetrix Electronics and suitable for industrial PLC I/O modules, legacy bus interface adapters, test equipment data acquisition, and automated test fixture controllers requiring stable component supply and long-term obsolescence management.
Supply support for SN74ALS576BNS 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, automotive, and communications product portfolios.
The SN74ALS576BNS belongs to TI's legacy 74ALS logic family, engineered specifically for high-reliability, medium-speed bus interfacing in commercial-grade digital systems where power efficiency and noise robustness are prioritized over raw speed.
FAQ
What is the function of the OE pin on the SN74ALS576BNS?
The OE (Output Enable) pin on the SN74ALS576BNS controls the 3-state output drivers independently of internal latch operation. When OE is LOW, outputs 1Q–8Q drive active-low latched data; when OE is HIGH, all outputs enter high-impedance state. Critically, OE has no effect on data capture or storage - the SN74ALS576BNS continues latching new data on CLK↑ even while outputs are disabled, enabling seamless bus arbitration without data loss.
Does the SN74ALS576BNS have a synchronous clear function?
No, the SN74ALS576BNS does not include a synchronous clear (CLR) input. It is functionally distinct from the SN74ALS577A, which adds a dedicated CLR pin for simultaneous reset of all eight flip-flops on the next CLK↑. The SN74ALS576BNS relies on external reset circuitry or data initialization via D inputs - this simplifies design where per-latch control suffices and avoids the 24-pin package and timing overhead of CLR assertion.
What package type is used for the SN74ALS576BNS part number?
The SN74ALS576BNS uses a 20-pin SOP (Small Outline Package) with NS suffix, featuring gull-wing leads, 1.27 mm pitch, and dimensions of 7.6 mm × 12.8 mm. It is RoHS-compliant with NiPdAu lead finish and MSL Level-1 rating, making it suitable for standard reflow assembly without moisture sensitivity concerns. This differs from the SN74ALS576BDWR (SOIC-DW) and SN74ALS576BN (PDIP-N) variants.
What is the maximum clock frequency supported by the SN74ALS576BNS?
The SN74ALS576BNS supports a maximum clock frequency of 30 MHz under recommended operating conditions (VCC = 4.5–5.5 V, TA = 0°C to 70°C, CL = 50 pF). This specification is verified per TI's SDAS065B datasheet and reflects guaranteed timing performance across temperature and voltage extremes - not a typical or characterization-only value. Operation beyond 30 MHz risks setup/hold violations and metastability.
How does the SN74ALS576BNS differ from the SN74AS576 series?
The SN74ALS576BNS uses Advanced Low-Power Schottky (ALS) technology, optimized for balanced speed and power (30 MHz, ICC ≤ 30 mA), whereas SN74AS576 employs Advanced Schottky (AS) for higher speed (125 MHz) at increased power (ICC ≤ 135 mA) and reduced noise margin. The SN74ALS576BNS offers superior noise immunity and lower static current, making it preferable for commercial bus interfaces where 30 MHz suffices; SN74AS576 targets ultra-fast timing-critical paths.
SN74ALS576BNS 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:
- -
SN74ALS576BNS FAQ
1.How can I place an order for SN74ALS576BNS through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALS576BNS 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 SN74ALS576BNS reliable?
The price and inventory of SN74ALS576BNS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALS576BNS is usually 5 days.
3.What payment methods are accepted for SN74ALS576BNS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALS576BNS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ALS576BNS?
SN74ALS576BNS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALS576BNS 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 SN74ALS576BNS?
For technical support, including SN74ALS576BNS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALS576BNS requirements.
6.How does Aetrix verify that SN74ALS576BNS is sourced from the original manufacturer or authorized distributors?
All SN74ALS576BNS 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 SN74ALS576BNS meets industry standards.
7.What is the process for return or replacement of SN74ALS576BNS?
All SN74ALS576BNS units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALS576BNS, 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 SN74ALS576BNS part is unused and in its original packaging.
Return procedure for SN74ALS576BNS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74ALS576BNS 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…
