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Texas Instruments SN74AHC574PWRG4
- Part No.:
- SN74AHC574PWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AHC574PWRG4.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,717
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Product details
Overview
SN74AHC574PWRG4 from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for bus interface applications including I/O port expansion and bidirectional data buffering. It operates from 2 V to 5.5 V, supports 3.3 V and 5 V logic domains, delivers ±25 mA output drive per channel, and features 11 ns typical propagation delay (VCC = 5 V, CL = 15 pF). It is widely deployed in network switches and surveillance camera video data paths.
For engineers reviewing the SN74AHC574PWRG4 datasheet, SN74AHC574PWRG4 pinout, SN74AHC574PWRG4 application, or SN74AHC574PWRG4 equivalent, key selection criteria include its 20-pin TSSOP package, 3-state enable control (OE), positive-edge clock triggering, latch-up immunity (>250 mA), and ESD robustness (2000 V HBM).
Technical Context
The SN74AHC574PWRG4 implements eight independent D-type latches synchronized to the rising edge of CLK, with each Q output reflecting the corresponding D input state after clock assertion. Its 3-state outputs are controlled by a common active-low OE pin, enabling high-impedance bus release without external pull-ups or interface logic.
It uses advanced AHC CMOS technology to achieve rail-to-rail output swing, low dynamic power consumption (28 pF typical Cpd), and slow-edge design that minimizes output ringing on capacitive bus loads. Input tolerance up to 5.5 V allows reliable 5 V → 3.3 V level translation even when VCC = 3.3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - supports mixed-voltage system interfacing and single-supply operation across 3.3 V and 5 V domains. |
| Output Drive | ±25 mA per output - sufficient to directly drive standard TTL/CMOS bus loads without external buffers. |
| Propagation Delay | 11 ns max (VCC = 5 V, CL = 15 pF) - enables reliable operation in high-speed digital control and data capture at ≤90 MHz. |
| Setup/Hold Times | tsu = 3 ns, th = 1.5 ns (VCC = 5 V) - tight timing margins compatible with fast microcontroller GPIO and FPGA I/O interfaces. |
| ESD Rating | ±2000 V HBM - meets industrial-grade handling requirements without special ESD precautions during assembly. |
| Operating Temp | –40 °C to +125 °C - qualified for extended-temperature industrial and automotive under-hood applications. |
| Input Voltage Tolerance | Up to 5.5 V regardless of VCC - enables safe interfacing with 5 V signals while powered from 3.3 V supply. |
Pinout & Package
TSSOP-20 (PW) package: 6.5 mm × 6.4 mm body, 0.65 mm pitch, surface-mount, RoHS-compliant, moisture sensitivity level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-low output enable | Asserting low enables all eight Q outputs; high places them in high-impedance state for bus sharing. |
| 2–9 (1D–8D) | Data inputs | Asynchronous inputs latched on CLK rising edge; tolerate up to 5.5 V independent of VCC. |
| 10 (GND) | Ground reference | Primary return path for logic and output currents; must be low-inductance connection for signal integrity. |
| 11 (CLK) | Clock input | Positive-edge-triggered master clock; Schmitt-trigger input not specified - requires clean monotonic edges. |
| 12–19 (8Q–1Q) | Tri-state outputs | Octal buffered outputs with rail-to-rail swing; each capable of sourcing/sinking ±25 mA. |
| 20 (VCC) | Power supply | Single supply pin for entire device; requires local 0.1 µF bypass capacitor placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| 3-State Output Control | Common OE pin enables simultaneous bus release across all eight channels - eliminates need for discrete enable logic in multi-device systems. |
| 5.5-V Tolerant Inputs | Allows direct connection of 5 V microcontroller outputs to SN74AHC574PWRG4 powered at 3.3 V - removes level-shifter ICs and associated BOM cost. |
| Slow-Edge Output Design | Intentionally limited slew rate reduces output ringing and EMI on long PCB traces or unterminated buses - improves signal integrity without external termination. |
| Latch-Up Immunity | Exceeds 250 mA per JESD 17 - ensures robust operation in noisy industrial environments with transient coupling or ground bounce. |
| Low Dynamic Power | 28 pF typical power dissipation capacitance - minimizes switching current and thermal load in high-density logic arrays. |
Applications
| Network Switch Data Path | Surveillance Camera Video Interface |
|---|---|
|
Use Scenario: Buffering parallel address/data bus between switch ASIC and external SRAM or packet buffer memory. IC Role / Device Role / Timing Role: Octal D-flip-flop acting as synchronous register stage to isolate timing domains and absorb setup/hold violations. Use Value: Enables reliable 100+ MHz data capture using internal clock synchronization and 3-state bus isolation during memory access arbitration. |
Use Scenario: Interfacing CMOS image sensor parallel output (10–12 bit) to FPGA video processing pipeline. IC Role / Device Role / Timing Role: Edge-triggered data latch providing clean, jitter-free sampling of pixel data aligned to sensor VSYNC/HSYNC clocks. Use Value: Eliminates metastability risk at FPGA input registers and provides deterministic timing margin via 3 ns setup time at 5 V supply. |
| Industrial PLC I/O Expansion | Automotive Infotainment Display Controller |
|
Use Scenario: Expanding microcontroller GPIO count to drive 8-channel LED indicators or relay drivers in modular I/O modules. IC Role / Device Role / Timing Role: Bidirectional bus driver with configurable direction via OE, used as general-purpose output latch. Use Value: Delivers ±25 mA per channel to directly drive LEDs or optocouplers without external transistors - reduces component count and board area. |
Use Scenario: Level-translating and latching RGB video control signals (e.g., DE, HSYNC, VSYNC) from 5 V display controller to 3.3 V timing generator ASIC. IC Role / Device Role / Timing Role: Voltage-tolerant D-flip-flop performing synchronous domain crossing and noise filtering on critical timing signals. Use Value: 5.5 V input tolerance ensures compatibility with legacy 5 V display controllers while operating from 3.3 V rail - avoids dual-supply complexity. |
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 |
|---|---|---|---|
| SN74LVC574APWR | Lower VCC range (1.65–3.6 V); 24 mA output drive; faster tPLH (6.3 ns @ 3.3 V) | Optimized for 3.3 V-only systems; not 5 V input tolerant | Select when operating exclusively at 3.3 V and requiring lower power or higher speed - avoid if interfacing 5 V logic. |
| 74AHC574PW,118 | Same AHC family specs; identical pinout; manufactured by Nexperia; RoHS-compliant TSSOP-20 | No functional difference; validated drop-in replacement per manufacturer cross-reference | Preferred for dual-sourcing or extended lifecycle assurance; identical electrical and thermal behavior to SN74AHC574PWRG4. |
Compared with SN74AHC574PWRG4, SN74LVC574APWR offers higher speed at 3.3 V but lacks 5 V input tolerance, while 74AHC574PW,118 provides identical functionality with second-source availability - making it ideal for supply chain resilience without design change.
Availability
SN74AHC574PWRG4 is available at Aetrix Electronics and suitable for network switches, surveillance cameras, and industrial PLCs requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for SN74AHC574PWRG4 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 connectivity technologies, with over 90 years of innovation in industrial, automotive, and communications markets.
The SN74AHC574PWRG4 belongs to TI's AHC logic family, engineered for high-speed, low-power, mixed-voltage bus interface applications where signal integrity, latch-up immunity, and wide supply range are critical.
FAQ
What is the maximum clock frequency supported by SN74AHC574PWRG4?
The SN74AHC574PWRG4 supports up to 110 MHz maximum operating frequency at VCC = 5 V with CL = 15 pF load, as specified in its switching characteristics table. At 3.3 V, fMAX is 65 MHz under the same conditions. These values assume proper layout, decoupling, and signal integrity controls - actual system-level frequency may be limited by board parasitics and timing closure.
Does SN74AHC574PWRG4 support 5 V to 3.3 V level translation?
Yes, SN74AHC574PWRG4 supports 5 V to 3.3 V level translation: its inputs tolerate up to 5.5 V regardless of VCC voltage, allowing direct connection of 5 V logic signals while the device is powered from a 3.3 V supply. This eliminates external level shifters in mixed-voltage designs.
What is the function of the OE pin on SN74AHC574PWRG4?
The OE (Output Enable) pin on SN74AHC574PWRG4 is an active-low control that enables or disables all eight Q outputs simultaneously. When OE is low, outputs reflect latched D-input states; when OE is high, all outputs enter high-impedance state - essential for shared bus architectures and avoiding contention.
Is SN74AHC574PWRG4 suitable for automotive applications?
SN74AHC574PWRG4 is rated for –40 °C to +125 °C operation and meets AEC-Q100 stress test requirements per TI's qualification report. While not officially AEC-Q100 certified, its extended temperature range and latch-up immunity (>250 mA) make it suitable for non-safety-critical automotive infotainment and body control modules.
How should unused inputs be handled on SN74AHC574PWRG4?
All unused inputs on SN74AHC574PWRG4 - including D inputs, CLK, and OE - must be tied to a valid logic level (VCC or GND) to prevent floating states that cause excessive current draw, noise susceptibility, or undefined output behavior. TI recommends connecting unused D inputs to GND or VCC based on desired default latch state.
SN74AHC574PWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 115 MHz
- Max Propagation Delay @ V, Max CL:
- 10.6ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 5.5V
- Current - Quiescent (Iq):
- 4 µA
- Input Capacitance:
- 3 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74AHC574PWRG4 FAQ
1.How can I place an order for SN74AHC574PWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC574PWRG4 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 SN74AHC574PWRG4 reliable?
The price and inventory of SN74AHC574PWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC574PWRG4 is usually 5 days.
3.What payment methods are accepted for SN74AHC574PWRG4?
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SN74AHC574PWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC574PWRG4 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 SN74AHC574PWRG4?
For technical support, including SN74AHC574PWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC574PWRG4 requirements.
6.How does Aetrix verify that SN74AHC574PWRG4 is sourced from the original manufacturer or authorized distributors?
All SN74AHC574PWRG4 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 SN74AHC574PWRG4 meets industry standards.
7.What is the process for return or replacement of SN74AHC574PWRG4?
All SN74AHC574PWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC574PWRG4, 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 SN74AHC574PWRG4 part is unused and in its original packaging.
Return procedure for SN74AHC574PWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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