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Texas Instruments SN74ALS575ADWRG4
- Part No.:
- SN74ALS575ADWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74ALS575ADWRG4.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,008
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Product details
Overview
SN74ALS575ADWRG4 from Texas Instruments is an octal D-type edge-triggered flip-flop with 3-state noninverting outputs, synchronous clear (CLR), and bus-structured pinout. It operates from 0°C to 70°C at 4.5–5.5 V, supports 30 MHz clock frequency, and delivers ±24 mA output drive for direct bus interfacing in industrial control and data acquisition systems.
For engineers reviewing the SN74ALS575ADWRG4 datasheet, SN74ALS575ADWRG4 pinout, SN74ALS575ADWRG4 application, or SN74ALS575ADWRG4 equivalent, key selection criteria include synchronous clear timing (15 ns setup), 3-state enable/disable propagation delays (2–18 ns), bus-compatible 24-pin SOIC (DW) package, and ALS logic family compatibility with TTL-level inputs.
Technical Context
This device implements eight independent D-type latches triggered on the low-to-high CLK transition, with asynchronous output-enable (OE) that isolates internal state during high-impedance operation. Synchronous clear resets all eight outputs to logic low when CLR is asserted low concurrent with a CLK rising edge.
The 3-state outputs feature buffered control inputs, bus-structured pinout (D and Q terminals interleaved), and are characterized for TTL-compatible voltage thresholds (VIH = 2 V, VIL = 0.8 V) and robust noise immunity per ALS family specifications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | Advanced Low-Power Schottky (ALS), TTL-compatible input thresholds and output drive |
| Supply Voltage | 4.5 V to 5.5 V - ensures stable operation across industrial power rails with margin |
| Max Clock Frequency | 30 MHz - supports high-speed data latching in bus arbitration and I/O port applications |
| Output Drive | ±24 mA - directly drives terminated PCB buses without external buffers |
| Propagation Delay | tPLH/tPHL ≤ 14 ns - enables tight timing budgets in synchronous digital systems |
| Operating Temperature | 0°C to 70°C - qualified for commercial and industrial embedded environments |
| Clear Setup Time | tsu(CLR) = 15 ns - defines minimum hold of CLR before CLK↑ for reliable synchronous reset |
Pinout & Package
SN74ALS575ADWRG4 is housed in a 24-pin SOIC (DW) package, 7.5 mm wide, with standard 1.27 mm pitch and 2.65 mm max height. Pin 1 identifier located at top-left corner with notch orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Data Inputs (1D–8D) | Asynchronous parallel data inputs synchronized to CLK↑; TTL-compatible |
| 9 | GND | Ground reference for all internal logic and output stages |
| 10, 11, 12, 13, 14, 15, 16, 17 | Outputs (1Q–8Q) | Noninverting 3-state outputs; driven only when OE = L and CLK↑ sampled D |
| 18 | VCC | Positive supply rail (4.5–5.5 V); decoupling required near pin |
| 19 | CLK | Clock input - edge-triggered on low-to-high transition; controls data capture |
| 20 | OE | Output Enable - active-low; disables outputs to high-Z without affecting internal state |
| 21 | CLR | Synchronous Clear - active-low; resets all Q outputs to L on next CLK↑ when asserted |
| 22, 23, 24 | NC | No internal connection - must be left unconnected or tied to GND/VCC per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Bus-structured pinout | Interleaved D/Q assignment minimizes trace crosstalk and simplifies PCB routing for parallel data paths |
| Synchronous clear (CLR) | Ensures deterministic, clock-aligned reset of all eight registers - critical for state machine initialization |
| Buffered control inputs | Reduces loading on driving logic and improves noise rejection on OE and CLR lines |
| 3-state noninverting outputs | Enables bidirectional bus sharing without external direction control logic |
| ALS logic family | Delivers 30 MHz speed with lower power than standard LS, while maintaining TTL interface compatibility |
Applications
| Industrial I/O Port Expansion | Microcontroller Bus Interface |
|---|---|
Use Scenario: Expanding GPIO count on PLC backplanes or sensor concentrators using shared address/data bus. IC Role / Device Role / Timing Role: Octal latch buffering incoming sensor data or outgoing actuator commands with synchronized sampling. Use Value: Eliminates need for discrete buffers; 30 MHz clock support enables real-time response within 33 ns cycle time. | Use Scenario: Interfacing 8-bit microcontrollers (e.g., 8051 derivatives) to external memory or peripheral chips. IC Role / Device Role / Timing Role: Acting as data bus transceiver/latch between MCU data bus and slower peripherals. Use Value: Synchronous clear allows full register reset on system boot; bus-structured pinout reduces PCB layer count. |
| Digital Test Equipment | Legacy System Emulation |
Use Scenario: Capturing and holding test vectors in automated test fixtures for ASIC validation. IC Role / Device Role / Timing Role: Edge-triggered storage element capturing parallel stimulus data on CLK↑. Use Value: 15 ns CLR setup time ensures clean vector initialization; ±24 mA drive handles capacitive loads up to 100 pF. | Use Scenario: Replacing obsolete 74LS575 in retro-computing or avionics maintenance spares. IC Role / Device Role / Timing Role: Pin-compatible functional replacement with improved speed and lower power. Use Value: ALS family offers 30 MHz vs. LS's 25 MHz, with identical 24-pin SOIC footprint and logic behavior. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ALS574BDWR | No synchronous clear (CLR); only OE and CLK control; 20-pin SOIC | Lacks system-wide reset capability; requires external reset logic for register initialization | Select when synchronous clear is unnecessary and board space favors 20-pin footprint |
| SN74AS575DWR | Faster propagation (≤8 ns), higher drive (±48 mA), but higher ICC (89–142 mA) and same 24-pin SOIC | Better for high-speed timing-critical paths; less suitable for low-power or thermally constrained designs | Select when >30 MHz operation or stronger bus drive is required, accepting higher power consumption |
Compared with SN74ALS575ADWRG4, SN74ALS574BDWR omits synchronous reset functionality and uses fewer pins, while SN74AS575DWR trades higher speed and drive strength for increased supply current - making SN74ALS575ADWRG4 the optimal balance of speed, power, and integrated reset control for general-purpose bus latching.
Availability
SN74ALS575ADWRG4 is available at Aetrix Electronics and suitable for industrial I/O expansion, microcontroller bus interfacing, and legacy system emulation requiring stable component supply and long-term obsolescence management.
Supply support for SN74ALS575ADWRG4 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 delivering analog and embedded processing solutions, with over 90 years of innovation in logic, power, and signal chain technologies.
SN74ALS575ADWRG4 belongs to TI's legacy ALS logic product line, engineered for high-reliability, TTL-compatible digital interfacing in industrial control, test equipment, and military-grade systems where speed, noise immunity, and bus integrity are essential.
FAQ
What is the function of the CLR pin on the SN74ALS575ADWRG4?
The CLR (Clear) pin on the SN74ALS575ADWRG4 is a synchronous active-low input that resets all eight Q outputs to logic low on the next low-to-high clock (CLK) transition when asserted. It does not affect the internal D inputs or OE state, and requires a minimum 15 ns setup time before CLK↑ to ensure reliable operation. This behavior is confirmed in the function table and timing specifications of the SDAS165B datasheet.
Does SN74ALS575ADWRG4 support hot insertion or live bus swapping?
SN74ALS575ADWRG4 is not explicitly rated for hot insertion. Its absolute maximum rating allows up to 5.5 V on disabled 3-state outputs, but no bus-hold, power-up/down sequencing, or Ioff protection is specified. For live bus swapping, external series resistors and careful power sequencing are recommended. The device's 3-state outputs isolate the bus when OE is high, but dynamic voltage transients during insertion require system-level mitigation beyond SN74ALS575ADWRG4's inherent specs.
What is the recommended decoupling for SN74ALS575ADWRG4?
Texas Instruments recommends a 0.1 µF ceramic capacitor placed as close as possible to the VCC (pin 18) and GND (pin 9) pins of the SN74ALS575ADWRG4 to suppress high-frequency switching noise. For systems with multiple devices or high-current transients, adding a bulk 4.7–10 µF tantalum or aluminum electrolytic capacitor nearby further stabilizes the 5 V rail. Layout guidelines emphasize short, low-inductance traces between decoupling caps and the IC pins.
Can SN74ALS575ADWRG4 operate with a 3.3 V supply?
No, SN74ALS575ADWRG4 is not rated for 3.3 V operation. Its recommended operating supply range is strictly 4.5 V to 5.5 V, with VIH = 2.0 V and VIL = 0.8 V defined relative to 5 V. At 3.3 V, input thresholds become unreliable, output drive degrades significantly, and timing parameters (e.g., tPLH, fmax) are not guaranteed. For 3.3 V systems, consider TI's LVC or AUC logic families instead.
How does the bus-structured pinout of SN74ALS575ADWRG4 improve PCB layout?
The bus-structured pinout of SN74ALS575ADWRG4 - with D inputs (pins 1–8) and Q outputs (pins 10–17) arranged contiguously and interleaved - enables straight-through routing on adjacent PCB layers, minimizing trace length mismatch and crosstalk. This arrangement reduces skew between parallel data lines and simplifies fanout to memory or peripheral buses, directly supporting clean signal integrity in high-density industrial layouts without added termination or delay compensation.
SN74ALS575ADWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALS
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 30 MHz
- Max Propagation Delay @ V, Max CL:
- 14ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 2.6mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 17 mA
- Input Capacitance:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
SN74ALS575ADWRG4 FAQ
1.How can I place an order for SN74ALS575ADWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALS575ADWRG4 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 SN74ALS575ADWRG4 reliable?
The price and inventory of SN74ALS575ADWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALS575ADWRG4 is usually 5 days.
3.What payment methods are accepted for SN74ALS575ADWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALS575ADWRG4 transactions.
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4.How is shipping managed for SN74ALS575ADWRG4?
SN74ALS575ADWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALS575ADWRG4 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 SN74ALS575ADWRG4?
For technical support, including SN74ALS575ADWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALS575ADWRG4 requirements.
6.How does Aetrix verify that SN74ALS575ADWRG4 is sourced from the original manufacturer or authorized distributors?
All SN74ALS575ADWRG4 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 SN74ALS575ADWRG4 meets industry standards.
7.What is the process for return or replacement of SN74ALS575ADWRG4?
All SN74ALS575ADWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALS575ADWRG4, 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 SN74ALS575ADWRG4 part is unused and in its original packaging.
Return procedure for SN74ALS575ADWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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