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Texas Instruments SN74ALS575ADWR
- Part No.:
- SN74ALS575ADWR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74ALS575ADWR.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,088
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Product details
Overview
SN74ALS575ADWR from Texas Instruments is an octal D-type edge-triggered flip-flop with 3-state noninverting outputs, synchronous clear (CLR), and bus-structured pinout in a 24-pin SOIC (DW) package. It operates from 0°C to 70°C with 5 V supply, supports 30 MHz clock frequency, and delivers ±24 mA output drive for direct bus interfacing in legacy digital systems.
For engineers reviewing the SN74ALS575ADWR datasheet, SN74ALS575ADWR pinout, SN74ALS575ADWR application, or SN74ALS575ADWR equivalent, this device is selected for synchronous data latching with tri-state bus control in industrial control backplanes, test equipment register banks, and TTL-compatible memory address/data buffers where low-power ALS logic and deterministic timing are required.
Technical Context
This device implements eight independent D-type flip-flops triggered on the low-to-high clock (CLK) transition, with synchronous active-low clear (CLR) controlling all stages simultaneously. Its 3-state output-enable (OE) operates independently of internal state - enabling data retention during high-impedance output conditions.
The SN74ALS575ADWR uses bipolar ALS (Advanced Low-Power Schottky) technology, delivering propagation delays as low as 4 ns (tPLH/tPHL) and output enable/disable times down to 2 ns (tPHZ/tPLZ) under 50 pF load. Its bus-structured pinout places inputs on one side and outputs on the other to minimize trace crosstalk in dense PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | ALS (Advanced Low-Power Schottky) - balances speed and power vs. standard TTL; 19 mA typical ICC at 5 V, 0–70°C |
| Supply Voltage | 4.5 V to 5.5 V - compatible with regulated 5 V rails; absolute max 7 V |
| Max Clock Frequency | 30 MHz - enables reliable operation in high-speed data acquisition and control sequencers |
| Output Drive | ±24 mA (IOL/IOH) - sufficient to drive 10+ standard TTL loads or terminate unterminated buses |
| Propagation Delay | 4–14 ns (tPLH/tPHL) - ensures tight setup/hold timing margins in synchronous bus architectures |
| Operating Temperature | 0°C to 70°C - commercial-grade rating suitable for enclosed industrial electronics and instrumentation |
| Package | SOIC-24 (DW) - surface-mount, 0.300" wide, RoHS-compliant NIPDAU finish, MSL Level-1 |
Pinout & Package
SN74ALS575ADWR uses a 24-pin SOIC (DW) package with 0.300" body width and 1.27 mm pitch. Pin 1 is located at the top-left corner (quadrant Q1), with a beveled edge marking. The pinout follows a bus-structured layout: data inputs (1D–8D) and control signals (CLR, OE, CLK) occupy pins 1–12 and 23–24; outputs (1Q–8Q) occupy pins 13–20; VCC (pin 21) and GND (pin 22) are adjacent for decoupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–8 (1D–8D) | Data Inputs | Asynchronous D inputs for each flip-flop stage; sampled on CLK↑ |
| 9 (CLR) | Synchronous Clear | Active-low global reset - clears all Q outputs to low when asserted during CLK↑ |
| 10 (OE) | Output Enable | Active-low 3-state control - disables outputs without affecting internal latch state |
| 11 (CLK) | Clock Input | Edge-triggered input - rising edge captures D inputs into Q outputs |
| 13–20 (1Q–8Q) | Noninverting Outputs | Tri-state buffered Q outputs - drive bus lines directly; high-impedance when OE high |
| 21 (VCC) | Power Supply | +5 V supply rail - requires local 0.1 µF ceramic decoupling to GND (pin 22) |
| 22 (GND) | Ground | Reference return path - placed adjacent to VCC for minimal loop inductance |
| 23–24 (NC) | No Connect | Internally unconnected pins - must remain floating; no external tie required |
Key Features
| Feature | Design Value |
|---|---|
| Octal D-type flip-flops with synchronous clear | Single active-low CLR input resets all eight outputs simultaneously - eliminates need for daisy-chained reset logic |
| 3-state noninverting outputs | Outputs enter high-impedance state when OE is high - enables shared bus arbitration without external transceivers |
| Bus-structured pinout | Input and output groups segregated on opposite sides - reduces PCB routing congestion and signal coupling in backplane designs |
| ALS logic family performance | 30 MHz max clock rate with 4 ns min tPLH - provides timing headroom for 33 MHz system clocks with margin |
| Buffered control inputs | CLK, CLR, and OE include Schottky-clamped input buffers - improves noise immunity and reduces input current loading |
Applications
| Industrial Control Backplane | Automated Test Equipment (ATE) Register Bank |
|---|---|
Use Scenario: Latching parallel I/O status from PLC modules onto a shared data bus for CPU polling. IC Role / Device Role / Timing Role: Octal D-flip-flop acting as synchronized input capture buffer with 3-state output isolation between bus segments. Use Value: Synchronous CLR allows coordinated reset across multiple SN74ALS575ADWR devices; 24 mA drive sustains signal integrity over 15 cm backplane traces. | Use Scenario: Storing test pattern vectors in ATE controller memory interface before applying to DUT pins. IC Role / Device Role / Timing Role: Edge-triggered data register holding 8-bit stimulus words; OE enables dynamic bus sharing with other test resources. Use Value: Bus-structured pinout simplifies layer routing on dense ATE controller PCBs; 4 ns propagation delay supports sub-30 ns test cycle timing. |
| Legacy TTL Memory Address Buffer | Digital Signal Processing (DSP) Data Path Interface |
Use Scenario: Isolating and latching 8-bit address segments between microprocessor and EPROM/EEPROM arrays. IC Role / Device Role / Timing Role: Noninverting 3-state register buffering address lines while permitting multiplexed access by DMA controllers. Use Value: ALS logic ensures compatibility with 74LS/74S families; NC pins (23–24) allow footprint reuse across variants without redesign. | Use Scenario: Interfacing fixed-point DSP core outputs to external ADC/DAC FIFOs requiring synchronized parallel data handshaking. IC Role / Device Role / Timing Role: Synchronous data latch aligning DSP result words to external sampling clocks; OE controlled by FIFO full/empty flags. Use Value: Synchronous CLR enables deterministic initialization of data path on DSP reset; 30 MHz clock rating matches common DSP peripheral bus speeds. |
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 controls - requires external reset circuitry | Lacks global synchronous reset; unsuitable where coordinated multi-device initialization is required | Select when system-level reset is handled externally and cost minimization is prioritized |
| SN74AS575N | Faster AS family (90 MHz max clock, 3 ns tPLH); PDIP-24 package; higher ICC (89 mA typ) | Higher speed and power - appropriate for high-frequency test gear but incompatible with SOIC-only layouts | Select when timing budget demands <10 ns propagation or board space permits through-hole mounting |
Compared with SN74ALS575ADWR, SN74ALS574BDWR omits synchronous clear functionality and requires additional logic for coordinated reset, while SN74AS575N offers superior speed at the cost of higher power and incompatible packaging - making SN74ALS575ADWR optimal for cost-sensitive, space-constrained commercial industrial designs needing deterministic reset behavior.
Availability
SN74ALS575ADWR is available at Aetrix Electronics and suitable for industrial control backplanes, automated test equipment register banks, and legacy TTL memory address buffering requiring stable component supply across extended production lifecycles.
Supply support for SN74ALS575ADWR 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 for industrial, automotive, and communications markets.
SN74ALS575ADWR belongs to TI's legacy 74ALS logic family, designed specifically for high-reliability, medium-speed digital systems requiring TTL-compatible voltage levels, robust noise immunity, and long-term obsolescence resilience in industrial infrastructure.
FAQ
What is the function of the CLR pin on the SN74ALS575ADWR?
The CLR (Clear) pin on the SN74ALS575ADWR is an active-low synchronous reset input. When asserted low during the rising edge of CLK, it forces all eight Q outputs to logic low regardless of D-input states. This global reset occurs concurrently across all flip-flops and does not affect the 3-state output enable (OE) status - outputs retain their high-impedance or driven state per OE setting.
Does the SN74ALS575ADWR support mixed-voltage operation, such as 3.3 V logic interfacing?
No, the SN74ALS575ADWR is specified only for 4.5 V to 5.5 V operation and is not 3.3 V tolerant. Its input thresholds (VIH = 2.0 V, VIL = 0.8 V) and output levels (VOH ≥ 2.4 V at IOL = 12 mA) are designed for 5 V TTL/ALS compatibility. Direct connection to 3.3 V systems requires level-shifting circuitry to prevent damage or incorrect logic interpretation.
Can the SN74ALS575ADWR be used without connecting the NC pins (23 and 24)?
Yes, pins 23 and 24 of the SN74ALS575ADWR are designated No Connect (NC) and must remain unconnected - neither tied to VCC, GND, nor any signal. These pins have no internal bonding or circuit connection. Leaving them floating poses no functional or reliability risk and is required per TI's datasheet guidance for SN74ALS575ADWR.
What is the maximum capacitive load the SN74ALS575ADWR outputs can drive reliably?
The SN74ALS575ADWR is characterized for switching performance with CL = 50 pF, as specified in its switching characteristics table. While it can drive heavier loads, sustained operation beyond 50 pF may degrade tPLH/tPHL timing (increasing propagation delay) and increase ground bounce. For loads >50 pF, verify timing margins using actual board parasitics and consider adding series termination or reducing trace length to maintain SN74ALS575ADWR signal integrity.
How does the SN74ALS575ADWR differ from the SN74ALS574B in terms of control logic?
The SN74ALS575ADWR includes a dedicated synchronous active-low CLR input that resets all Q outputs on the next CLK↑ edge, whereas the SN74ALS574B lacks CLR and relies solely on OE and CLK for output control. This makes SN74ALS575ADWR suitable for applications requiring deterministic, clock-synchronized initialization - a capability absent in SN74ALS574B without external gating logic.
SN74ALS575ADWR 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
SN74ALS575ADWR FAQ
1.How can I place an order for SN74ALS575ADWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALS575ADWR 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 SN74ALS575ADWR reliable?
The price and inventory of SN74ALS575ADWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALS575ADWR is usually 5 days.
3.What payment methods are accepted for SN74ALS575ADWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALS575ADWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ALS575ADWR?
SN74ALS575ADWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALS575ADWR 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 SN74ALS575ADWR?
For technical support, including SN74ALS575ADWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALS575ADWR requirements.
6.How does Aetrix verify that SN74ALS575ADWR is sourced from the original manufacturer or authorized distributors?
All SN74ALS575ADWR 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 SN74ALS575ADWR meets industry standards.
7.What is the process for return or replacement of SN74ALS575ADWR?
All SN74ALS575ADWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALS575ADWR, 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 SN74ALS575ADWR part is unused and in its original packaging.
Return procedure for SN74ALS575ADWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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