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Texas Instruments SN74AHC574PWRE4
- Part No.:
- SN74AHC574PWRE4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AHC574PWRE4.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,117
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Product details
Overview
SN74AHC574PWRE4 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 buffering and bidirectional data routing. It operates from 2 V to 5.5 V, supports 5.5-V tolerant inputs for 5 V-to-3.3 V level translation, and delivers ±8 mA output drive at 5 V with propagation delays as low as 5.6 ns (tPLH/tPHL, CL = 15 pF). It is used in network switches, surveillance cameras, and infotainment systems.
For engineers reviewing the SN74AHC574PWRE4 datasheet, SN74AHC574PWRE4 pinout, SN74AHC574PWRE4 application, or SN74AHC574PWRE4 equivalent, key selection criteria include its 20-pin SOIC (DW) package, 3-state output control via OE, edge-triggered synchronous latching behavior, and compatibility with mixed-voltage bus environments requiring low-output ringing and high-impedance isolation.
Technical Context
The SN74AHC574PWRE4 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 buffered OE input enables simultaneous high-impedance tri-state control across all eight outputs, eliminating bus contention without external pull-ups.
It uses advanced AHC CMOS technology delivering balanced rise/fall times, slow-edge optimization to suppress output ringing into capacitive loads, and 5.5-V tolerant inputs that operate correctly across VCC = 2 V–5.5 V - enabling robust voltage-level translation in heterogeneous logic systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | AHC - Advanced High-Speed CMOS, offering lower power than AC while maintaining higher speed than HC. |
| Supply Voltage Range | 2 V to 5.5 V - supports single-supply operation across 3.3 V and 5 V systems, with 5.5-V tolerant inputs enabling safe interfacing to higher-voltage logic. |
| Output Drive | ±8 mA at VCC = 5 V - sufficient to drive standard TTL loads and moderate-capacitance buses without external buffers. |
| Propagation Delay | 5.6 ns (tPLH/tPHL, VCC = 5 V, CL = 15 pF) - enables reliable operation up to 110 MHz fMAX in 5 V systems. |
| Input Transition Rate | 20 ns/V (VCC = 5 V) - ensures stable sampling of slow-rising signals and reduces sensitivity to noise-induced false triggering. |
| ESD Protection | ±2000 V HBM, ±1000 V CDM - exceeds JEDEC standards, supporting robust handling in automated assembly and field-deployed equipment. |
| Operating Temperature | –40°C to +125°C - qualified for industrial and extended-temperature embedded applications including networking and video infrastructure. |
Pinout & Package
SN74AHC574PWRE4 is packaged in a 20-pin SOIC (DW) body measuring 12.80 mm × 10.3 mm, with 12.8 mm × 7.5 mm body size and RoHS-compliant NiPdAu lead finish. It features gull-wing leads, 1.27 mm pitch, and moisture sensitivity level (MSL) 1 (unlimited floor life at ≤30°C/60% RH).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Output Enable Input | Active-low control: drives all Q outputs to high-impedance when low; enables normal logic states when high. |
| 2–9 (1D–8D) | Data Inputs | Asynchronous D inputs for each of eight flip-flop channels; accept 5.5-V tolerant logic levels regardless of VCC. |
| 10 (GND) | Ground Reference | Primary return path for logic and output currents; must be low-impedance and decoupled per layout guidelines. |
| 11 (CLK) | Clock Input | Rising-edge-triggered synchronous input; latches all D inputs to Q outputs on active transition. |
| 12–19 (8Q–1Q) | Tri-State Outputs | Octal buffered outputs with 3-state capability; high-impedance when OE is low, otherwise reflect latched D values. |
| 20 (VCC) | Power Supply | Single supply rail (2 V–5.5 V); requires local 0.1 µF ceramic bypass capacitor placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| 5.5-V tolerant inputs | Enables direct interfacing between 5 V legacy logic and 3.3 V microcontrollers without level-shifter components. |
| Slow-edge output drive | Reduces signal overshoot/undershoot and EMI in high-speed bus environments, especially with long traces or unterminated lines. |
| High-impedance 3-state outputs | Allows multiple SN74AHC574PWRE4 devices to share a common data bus without contention or need for external isolation. |
| Latch-up immunity >250 mA | Meets JESD17 requirements, ensuring robustness against transient current surges during hot-swap or fault conditions. |
| Industrial temperature range | Rated for –40°C to +125°C operation, supporting deployment in automotive cabin electronics and industrial control cabinets. |
Applications
| Network Switch Data Path | Surveillance Camera Video Interface |
|---|---|
Use Scenario: Buffering parallel address/data bus between switch ASIC and external SRAM or configuration EEPROM. IC Role / Device Role / Timing Role: Synchronous register holding control words or MAC table entries; OE enables dynamic bus arbitration during packet forwarding cycles. Use Value: 3-state outputs prevent bus contention during memory read/write transitions; 5.5-V tolerant inputs simplify integration with mixed-voltage PHY layers. | Use Scenario: Isolating and latching parallel video data streams (e.g., BT.656) between image sensor and SoC video processor. IC Role / Device Role / Timing Role: Edge-triggered latch capturing pixel data on rising CLK; OE synchronizes frame buffer writes while suppressing bus noise during blanking intervals. Use Value: Low propagation delay (<6 ns) preserves timing margins in 27 MHz video clocks; slow-edge drive minimizes jitter induced by trace capacitance. |
| Infotainment System I/O Expansion | Smart Grid Communication Module |
Use Scenario: Expanding GPIO count for touchscreen controller, button matrix, or LED driver interface in automotive head units. IC Role / Device Role / Timing Role: Bidirectional bus driver implementing software-configurable input/output ports; CLK and OE coordinated via MCU firmware. Use Value: ±8 mA drive supports direct LED sinking; 2 V–5.5 V operation matches varied subsystem supply rails (e.g., 3.3 V MCU, 5 V display backlight). | Use Scenario: Level-translating and latching command/status signals between 5 V PLC modem and 3.3 V ARM-based metering processor. IC Role / Device Role / Timing Role: Voltage-tolerant D-flip-flop acting as isolated control register for relay drivers or sensor ADC interfaces. Use Value: 5.5-V tolerant inputs eliminate discrete level shifters; latch-up immunity (>250 mA) withstands induced transients on utility-side communication lines. |
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 |
|---|---|---|---|
| SN74LV574APWRE4 | Lower VCC range (1.65 V–5.5 V), reduced drive (±6 mA @ 3.3 V), slower max frequency (85 MHz @ 3.3 V). | Better suited for ultra-low-voltage portable designs; less suitable for 5 V legacy bus loading. | Select when system VCC ≤3.3 V and lower power consumption is prioritized over 5 V drive capability. |
| 74ACT574SCX | Higher drive (±24 mA @ 5 V), faster tPLH (3.5 ns), but no 5.5-V tolerant inputs and narrower temp range (–40°C to +85°C). | Preferred for high-speed 5 V-only systems where bus loading exceeds 8 mA per line. | Choose only if full 5 V operation is guaranteed and 5 V-to-3.3 V translation is handled externally. |
Compared with SN74LV574APWRE4 and 74ACT574SCX, SN74AHC574PWRE4 uniquely balances 5.5-V input tolerance, industrial temperature rating, and moderate drive strength - making it optimal for mixed-voltage industrial and automotive bus interfaces where reliability and voltage flexibility outweigh peak speed or ultra-low power.
Availability
SN74AHC574PWRE4 is available at Aetrix Electronics and suitable for network switches, surveillance cameras, and infotainment systems requiring stable component supply, long-term industrial lifecycle support, and RoHS-compliant manufacturing.
Supply support for SN74AHC574PWRE4 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 decades of experience in logic IC design and high-reliability manufacturing.
The SN74AHC574PWRE4 belongs to TI's AHC logic family, engineered for high-speed, low-power, mixed-voltage digital interfacing - specifically targeting industrial, communications, and automotive applications demanding robust timing, bus isolation, and voltage translation.
FAQ
What is the maximum clock frequency supported by SN74AHC574PWRE4?
SN74AHC574PWRE4 supports up to 110 MHz maximum operating frequency (fMAX) under 5 V supply and 15 pF load conditions. At 3.3 V, fMAX drops to 65 MHz. These values assume proper PCB layout, decoupling, and termination - actual system-level timing must account for board-level skew and setup/hold margins relative to the clock source driving SN74AHC574PWRE4.
Does SN74AHC574PWRE4 require external pull-up resistors on its outputs?
No, SN74AHC574PWRE4 does not require external pull-up resistors on its outputs. Its 3-state outputs actively drive high or low when enabled (OE high), and enter high-impedance (not floating) when disabled (OE low). Pull-ups are unnecessary unless a specific bus protocol mandates weak-high default states - which is not inherent to SN74AHC574PWRE4 functionality.
Can SN74AHC574PWRE4 safely interface a 5 V microcontroller with a 3.3 V FPGA?
Yes, SN74AHC574PWRE4 can safely interface a 5 V microcontroller with a 3.3 V FPGA. Its 5.5-V tolerant inputs accept 5 V logic levels even when VCC = 3.3 V, and its outputs swing rail-to-rail within the 3.3 V domain. This eliminates level-shifter ICs in unidirectional data paths - though direction control (via OE and CLK timing) must be managed by the system designer to avoid bus contention.
What is the recommended bypass capacitor for SN74AHC574PWRE4?
Texas Instruments recommends a 0.1 µF ceramic capacitor placed as close as possible to the VCC pin (Pin 20) of SN74AHC574PWRE4. For systems with multiple power domains or high-noise environments, paralleling a 1 µF capacitor improves low-frequency decoupling. The ground connection must be short and low-inductance to maintain effective noise suppression for SN74AHC574PWRE4 timing integrity.
Is SN74AHC574PWRE4 pin-compatible with other 20-pin octal D-flip-flops like SN74LS574N?
No, SN74AHC574PWRE4 is not pin-compatible with SN74LS574N. While both are 20-pin octal D-flip-flops with 3-state outputs, SN74LS574N uses a different pinout: its OE is on Pin 13 (not Pin 1), and Q outputs are arranged differently (e.g., 1Q on Pin 2, not Pin 19). Substituting SN74AHC574PWRE4 for LS-series devices requires PCB redesign - always verify pin mapping using the official TI SN74AHC574PWRE4 datasheet before layout.
SN74AHC574PWRE4 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:
- Discontinued at Digi-Key
- 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
SN74AHC574PWRE4 FAQ
1.How can I place an order for SN74AHC574PWRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC574PWRE4 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 SN74AHC574PWRE4 reliable?
The price and inventory of SN74AHC574PWRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC574PWRE4 is usually 5 days.
3.What payment methods are accepted for SN74AHC574PWRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHC574PWRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AHC574PWRE4?
SN74AHC574PWRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC574PWRE4 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 SN74AHC574PWRE4?
For technical support, including SN74AHC574PWRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC574PWRE4 requirements.
6.How does Aetrix verify that SN74AHC574PWRE4 is sourced from the original manufacturer or authorized distributors?
All SN74AHC574PWRE4 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 SN74AHC574PWRE4 meets industry standards.
7.What is the process for return or replacement of SN74AHC574PWRE4?
All SN74AHC574PWRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC574PWRE4, 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 SN74AHC574PWRE4 part is unused and in its original packaging.
Return procedure for SN74AHC574PWRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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