My Inquiry
My Account
Texas Instruments SN74LVC574APWRE4
- Part No.:
- SN74LVC574APWRE4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC574APWRE4.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,878
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LVC574APWRE4 from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for 1.65 V to 3.6 V operation. It features 20-pin TSSOP packaging, 7 ns max propagation delay at 3.3 V, ±24 mA output drive, and Ioff support for partial-power-down mode. It serves as a bidirectional bus register in low-voltage digital systems such as industrial I/O controllers and FPGA interface buffers.
For engineers reviewing the SN74LVC574APWRE4 datasheet, SN74LVC574APWRE4 pinout, SN74LVC574APWRE4 application, or SN74LVC574APWRE4 equivalent, key selection criteria include its 3.3-V/5-V mixed-mode input tolerance, high-impedance output enable timing (ten/tdis ≤ 7.5 ns), −40°C to 125°C operating range, and compatibility with space-constrained PCB layouts requiring TSSOP-20 footprint.
Technical Context
This device implements eight independent D-type latches triggered on the rising edge of CLK, with synchronous data capture and asynchronous 3-state control via OE. Its CMOS design ensures rail-to-rail logic levels, while Ioff circuitry blocks current flow during power-down states to prevent backdrive damage.
The SN74LVC574APWRE4 supports mixed-signal interfacing: inputs tolerate 5.5 V regardless of VCC (1.65–3.6 V), enabling direct connection to legacy 5-V logic without level shifters. Output VOH/VOL specifications are guaranteed across all VCC and temperature grades, and ground bounce (VOLP < 0.8 V) and undershoot (VOHV > 2 V) are characterized at 3.3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.65 V to 3.6 V - Enables interoperability with 1.8-V, 2.5-V, and 3.3-V logic domains. |
| Max Propagation Delay | 7 ns at 3.3 V - Supports clock frequencies up to 150 MHz in high-speed data latching paths. |
| Output Drive Strength | ±24 mA at 3 V - Sufficient to drive 50-pF loads or terminate stubs on medium-length PCB traces. |
| Input Voltage Tolerance | 0 V to 5.5 V - Allows direct interfacing with 5-V microcontrollers or sensors without external translators. |
| Ioff Current | ±10 μA at 5.5 V - Ensures safe isolation during hot-insertion or partial system power-down. |
| Operating Temperature | −40°C to 125°C - Qualified for under-hood automotive, industrial motor control, and extended-range embedded applications. |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - Meets JEDEC JESD22 standards for robust handling in manufacturing and field environments. |
Pinout & Package
TSSOP-20 package (PW), 6.5 mm × 4.4 mm body, 0.65 mm pitch, exposed pad optional (not electrically connected). 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 synchronized to CLK↑; accept 0–5.5 V regardless of VCC. |
| 9 | GND | Ground reference for all internal logic and output drivers; must be low-impedance for noise control. |
| 10 | VCC | Primary supply rail (1.65–3.6 V); powers core logic and output stages. |
| 11, 12, 13, 14, 15, 16, 17, 18 | Outputs (1Q–8Q) | 3-state buffered outputs; high-impedance when OE = high, driven low/high when OE = low. |
| 19 | CLK | Positive-edge-triggered clock input; minimum pulse width 3.3 ns at 3.3 V ensures reliable sampling. |
| 20 | OE | Active-low output enable; controls all eight outputs simultaneously; does not affect internal latch state. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-voltage translation | 5-V-tolerant inputs enable seamless bridging between 3.3-V FPGAs and 5-V legacy peripherals. |
| Partial-power-down protection | Ioff circuitry limits off-state current to ±10 μA, preventing backflow damage during staggered power sequencing. |
| Low ground bounce | VOLP < 0.8 V at 3.3 V ensures stable logic thresholds in noise-sensitive analog-adjacent subsystems. |
| High-speed 3-state control | ten ≤ 7.5 ns / tdis ≤ 6.4 ns enables glitch-free bus sharing in time-critical multiplexed data paths. |
| Latch-up immunity | Exceeds 250 mA per JESD17 - eliminates risk of destructive latch-up in high-noise industrial environments. |
Applications
| Industrial PLC I/O Module | FPGA Configuration Interface |
|---|---|
|
Use Scenario: Latching sensor data from 8-channel ADCs before transmission to a main controller over a shared parallel bus. IC Role / Device Role / Timing Role: Octal D-flip-flop acting as a synchronized input register; CLK aligned to system sampling clock, OE tied low for continuous capture. Use Value: Eliminates metastability risk during asynchronous data transfer and provides clean, jitter-free sampling edges at up to 150 MHz. |
Use Scenario: Buffering configuration bitstream from flash memory to an FPGA during power-up initialization. IC Role / Device Role / Timing Role: Bidirectional bus driver with 3-state outputs; OE controlled by FPGA INIT_B signal to isolate bus until configuration completes. Use Value: Prevents bus contention during FPGA reset and allows safe hot-plug reconfiguration without external logic. |
| Automotive Body Control Unit | Test Equipment Digital Pattern Generator |
|
Use Scenario: Isolating microcontroller GPIOs from high-current load drivers (e.g., LED arrays, solenoids) in a CAN-connected BCU. IC Role / Device Role / Timing Role: Output register with Ioff-enabled power-down; OE driven by MCU to disable outputs during sleep mode. Use Value: Reduces quiescent current to <10 μA per channel and prevents backfeed into powered-down MCU ports. |
Use Scenario: Generating precise, skew-controlled 8-bit stimulus patterns for IC functional testing. IC Role / Device Role / Timing Role: Edge-triggered pattern latch; CLK sourced from precision function generator, OE used to freeze output during test setup. Use Value: Achieves sub-nanosecond inter-channel skew (tsk(o) ≤ 1 ns) and supports repeatable, deterministic vector generation. |
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 |
|---|---|---|---|
| SN74LVC574APWR | Same silicon, identical electrical specs; differs only in tape-and-reel packaging (2000 pcs/reel vs. E4's 2000 pcs/reel with TI's standard green-label carrier). | No functional difference; both qualified for −40°C to 125°C operation and share identical thermal and reliability data. | Select SN74LVC574APWR if sourcing from distributors using TI's standard reel format; SN74LVC574APWRE4 is preferred for traceability in aerospace/defense BOMs. |
| 74LVC574ADTR | STMicroelectronics variant; same pinout and voltage specs but higher max tpd (8.5 ns @ 3.3 V) and lower Ioff (±5 μA). | Marginally slower timing and reduced off-state leakage make it less suitable for ultra-low-power or high-frequency designs. | Choose 74LVC574ADTR only when dual-sourcing is required and timing slack ≥1.5 ns exists in the critical path. |
Compared with SN74LVC574APWRE4, SN74LVC574APWR offers identical performance with standard TI packaging, while 74LVC574ADTR trades 1.5 ns speed and 5 μA Ioff margin for second-source flexibility-neither is pin-compatible without layout verification due to minor package dimensional variances.
Availability
SN74LVC574APWRE4 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, FPGA configuration interfaces, and automated test equipment requiring stable component supply across extended temperature ranges.
Supply support for SN74LVC574APWRE4 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 logic solutions with over 50 years of innovation in high-reliability digital interface components.
The SN74LVC574A product line delivers robust, low-voltage octal latches optimized for mixed-signal interfacing, bus isolation, and power-aware digital systems in industrial, automotive, and communications infrastructure.
FAQ
What is the maximum clock frequency supported by SN74LVC574APWRE4?
The SN74LVC574APWRE4 supports a maximum clock frequency of 150 MHz at 2.7 V and 3.3 V supply voltages across its full −40°C to 125°C operating range. At 1.8 V, the maximum frequency drops to 55 MHz due to reduced drive strength and increased propagation delay.
Does SN74LVC574APWRE4 require external pull-up resistors on the OE pin?
Yes - to ensure the outputs remain in high-impedance state during power-up or power-down, OE should be tied to VCC through a pull-up resistor. The minimum resistance value depends on the driving source's current-sinking capability, typically 10 kΩ for standard CMOS drivers.
Can SN74LVC574APWRE4 safely interface with 5-V logic inputs?
Yes - SN74LVC574APWRE4 inputs are rated for 0 V to 5.5 V regardless of VCC (1.65–3.6 V), allowing direct connection to 5-V microcontrollers, sensors, or legacy peripherals without level-shifting circuitry.
What is the thermal resistance (θJA) of the SN74LVC574APWRE4 TSSOP package?
The SN74LVC574APWRE4 in TSSOP-20 (PW) package has a junction-to-ambient thermal resistance (θJA) of 83°C/W, measured per JESD51-7 on a standard 2-layer PCB with 1-in² copper area. Derating begins above 60°C at 5.5 mW/K.
Is SN74LVC574APWRE4 compatible with lead-free reflow processes?
Yes - SN74LVC574APWRE4 uses NIPDAU lead finish and is rated MSL Level-1 (unlimited floor life), qualified for peak reflow temperatures up to 260°C per JEDEC J-STD-020, making it fully compatible with standard lead-free soldering profiles.
SN74LVC574APWRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- 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:
- 150 MHz
- Max Propagation Delay @ V, Max CL:
- 6.8ns @ 3.3V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Current - Quiescent (Iq):
- 10 µA
- Input Capacitance:
- 4 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74LVC574APWRE4 FAQ
1.How can I place an order for SN74LVC574APWRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC574APWRE4 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 SN74LVC574APWRE4 reliable?
The price and inventory of SN74LVC574APWRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC574APWRE4 is usually 5 days.
3.What payment methods are accepted for SN74LVC574APWRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC574APWRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC574APWRE4?
SN74LVC574APWRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC574APWRE4 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 SN74LVC574APWRE4?
For technical support, including SN74LVC574APWRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC574APWRE4 requirements.
6.How does Aetrix verify that SN74LVC574APWRE4 is sourced from the original manufacturer or authorized distributors?
All SN74LVC574APWRE4 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 SN74LVC574APWRE4 meets industry standards.
7.What is the process for return or replacement of SN74LVC574APWRE4?
All SN74LVC574APWRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC574APWRE4, 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 SN74LVC574APWRE4 part is unused and in its original packaging.
Return procedure for SN74LVC574APWRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LVC574APWRE4 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…
