My Inquiry
My Account
Texas Instruments SN74AHCT574PWRG4
- Part No.:
- SN74AHCT574PWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AHCT574PWRG4.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,863
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74AHCT574PWRG4 from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for bus interface applications requiring TTL-compatible inputs (VIH = 2 V, VIL = 0.8 V), 5-V supply operation, and high-impedance output control via OE. It drives capacitive or low-impedance loads in microcontroller I/O expansion and bidirectional data buffering.
For engineers reviewing the SN74AHCT574PWRG4 datasheet, SN74AHCT574PWRG4 pinout, SN74AHCT574PWRG4 application, or SN74AHCT574PWRG4 equivalent, key selection criteria include 3-state output timing (tPLH/tPHL ≤ 11 ns at CL = 50 pF), latch enable setup/hold (tsu = 3.5 ns, th = 1.5 ns), and industrial temperature range (–40°C to 125°C).
Technical Context
The SN74AHCT574PWRG4 implements eight independent D-type latches synchronized to the rising edge of CLK, with each output placed into high-impedance state when OE is high. Its TTL-voltage-compatible inputs allow direct interfacing with 3.3-V logic while operating from a 5-V supply.
It features slow-edge-rate outputs to suppress ringing on transmission lines, supports up-translation from 3.3 V to 5 V, and meets JESD22-A114-A (±2000 V HBM) and JESD22-C101 (±1000 V CDM) ESD standards. Absolute maximum ratings include VCC = –0.5 V to 7 V and continuous output current ±25 mA per pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - ensures stable operation across standard 5-V rail tolerances |
| Input Thresholds | VIH = 2 V, VIL = 0.8 V - enables reliable interfacing with TTL and 3.3-V CMOS logic |
| Output Drive | IOL = 8 mA, IOH = –8 mA - sufficient for driving moderate-capacitance buses without external buffers |
| Propagation Delay | tPLH/tPHL = 13 ns max (CL = 50 pF) - defines maximum clock-to-output latency in synchronous bus systems |
| Enable Timing | tPZH/tPZL = 13.5 ns max (CL = 50 pF) - determines worst-case time to enter/exit high-impedance state |
| Operating Temp | –40°C to 125°C - qualified for industrial and extended-temperature embedded environments |
| ESD Rating | ±2000 V HBM - provides robust handling margin during PCB assembly and system integration |
Pinout & Package
TSSOP-20 (PW) package: 6.50 mm × 6.40 mm body size, 1.2 mm height, lead pitch 0.65 mm, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Output Enable input | Active-low control: OE = L enables Q outputs; OE = H forces all Q pins to high-impedance |
| 2–9 (1D–8D) | Data inputs | Asynchronous D inputs latched on rising CLK edge; TTL-compatible voltage thresholds |
| 10 (GND) | Ground reference | Primary return path for logic and output currents; must be low-impedance connection |
| 11 (CLK) | Clock input | Rising-edge-triggered latch control; accepts slow edges to minimize output ringing |
| 12–19 (8Q–1Q) | 3-state outputs | Octal buffered outputs with high-impedance state; drive capability ±25 mA per pin |
| 20 (VCC) | Power supply | 5-V nominal supply; requires local 0.1 µF bypass capacitor per VCC pin |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH = 2 V / VIL = 0.8 V enables direct connection to legacy 5-V TTL and mixed-voltage 3.3-V systems |
| 3-state output control | Single OE pin disables all eight outputs simultaneously, enabling shared-bus arbitration without external logic |
| Slow-edge-rate outputs | Controlled slew rate reduces signal overshoot/undershoot on PCB traces and cables |
| Industrial temperature range | –40°C to 125°C operation supports deployment in automotive under-hood, power infrastructure, and industrial control systems |
| High noise immunity | Input hysteresis and 2000-V HBM ESD rating ensure reliability in electrically noisy environments |
Applications
| Microcontroller I/O Expansion | Bidirectional Data Bus Interface |
|---|---|
Use Scenario: Expanding GPIO count of an ARM Cortex-M4 MCU in a programmable logic controller. IC Role / Device Role / Timing Role: SN74AHCT574PWRG4 acts as an octal transparent latch, capturing parallel data from MCU writes and presenting it to peripheral address/data buses on CLK rise. Use Value: Enables deterministic timing control over data staging with 3.5 ns setup margin and eliminates need for discrete level-shifting components. | Use Scenario: Isolating and buffering a shared 8-bit data bus between two SoCs operating at different voltage domains. IC Role / Device Role / Timing Role: SN74AHCT574PWRG4 serves as a direction-controlled bus transceiver using OE to manage read/write contention. Use Value: Prevents bus contention via high-impedance isolation and supports 5-V tolerant inputs for seamless 3.3-V ↔ 5-V domain bridging. |
| Industrial Sensor Hub Interface | Legacy Display Controller Buffer |
Use Scenario: Aggregating digital outputs from eight analog sensor ADCs into a central FPGA-based processing unit. IC Role / Device Role / Timing Role: SN74AHCT574PWRG4 functions as a synchronized sampling register, latching parallel sensor data on system clock edge before serial transfer. Use Value: Provides simultaneous capture with <1.5 ns hold margin and ESD-hardened inputs for field-deployed sensor nodes. | Use Scenario: Driving column drivers of an industrial LCD panel requiring precise 5-V logic levels and low-noise transitions. IC Role / Device Role / Timing Role: SN74AHCT574PWRG4 operates as a static display data latch, holding pixel values stable during scan-line updates. Use Value: Delivers clean, ring-free edges to reduce EMI emissions and meet CISPR-22 Class B radiated emission limits. |
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 |
|---|---|---|---|
| SN74AHCT373PWR | Octal transparent latch with identical pinout and 3-state outputs; differs in internal enable polarity (active-high LE vs active-low OE) | Requires inverted OE control logic; same timing specs and voltage compatibility | Select when existing firmware uses active-high latch-enable signaling |
| 74LVC574APW,118 | 3.3-V only supply (1.65–3.6 V); lower drive (±24 mA); faster propagation (7.5 ns typ) | Not suitable for 5-V systems; requires level translation if interfacing with 5-V peripherals | Prefer for pure 3.3-V designs where lower power and speed outweigh voltage compatibility needs |
Compared with SN74AHCT373PWR and 74LVC574APW,118, the SN74AHCT574PWRG4 uniquely combines 5-V operation, TTL input compatibility, and industrial temperature range-making it optimal for mixed-signal industrial interfaces where voltage translation and ruggedness are critical.
Availability
SN74AHCT574PWRG4 is available at Aetrix Electronics and suitable for microcontroller I/O expansion, bidirectional data bus interface, and industrial sensor hub interface requiring stable component supply across production lifecycles.
Supply support for SN74AHCT574PWRG4 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 precision analog, power management, and logic ICs.
The SN74AHCT574PWRG4 belongs to TI's advanced high-speed CMOS logic family, engineered specifically for robust 5-V bus interfacing in industrial, automotive, and communications equipment where signal integrity and temperature resilience are essential.
FAQ
What is the recommended bypass capacitor for SN74AHCT574PWRG4?
A 0.1 µF ceramic capacitor is recommended directly at the VCC pin of the SN74AHCT574PWRG4 to suppress high-frequency noise and stabilize the 5-V supply during output switching events. Place it as close as possible to the pin with minimal trace length to maintain low ESL and ensure effective decoupling across the device's operating frequency range.
Does SN74AHCT574PWRG4 support 3.3-V input signals?
Yes, SN74AHCT574PWRG4 supports 3.3-V input signals because its TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V) are satisfied by standard 3.3-V CMOS logic levels. This allows direct connection to 3.3-V microcontrollers without level shifters, enabling seamless voltage up-translation in mixed-supply systems.
What is the maximum capacitive load SN74AHCT574PWRG4 can drive reliably?
SN74AHCT574PWRG4 is characterized for loads up to 50 pF, with guaranteed switching performance (tPLH/tPHL ≤ 13 ns) and controlled edge rates that prevent ringing. Driving >50 pF may increase propagation delay and risk signal integrity issues unless compensated with series termination or reduced edge rate.
Can SN74AHCT574PWRG4 replace SN74AHCT574PW in existing designs?
Yes, SN74AHCT574PWRG4 is a drop-in replacement for SN74AHCT574PW: both use the same TSSOP-20 (PW) package, share identical pinout, electrical specifications, and thermal characteristics, and differ only in tape-and-reel packaging (2000 pcs/reel) and RoHS compliance marking (G4 suffix denotes green packaging).
How does the OE pin function in SN74AHCT574PWRG4?
The OE (Output Enable) pin in SN74AHCT574PWRG4 is an active-low control: when OE = LOW, the eight Q outputs reflect the latched D-input states; when OE = HIGH, all Q outputs enter high-impedance state, effectively disconnecting the device from the bus. This enables multi-drop bus architectures without contention.
SN74AHCT574PWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHCT
- 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:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 4 µA
- Input Capacitance:
- 3 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74AHCT574PWRG4 FAQ
1.How can I place an order for SN74AHCT574PWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHCT574PWRG4 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 SN74AHCT574PWRG4 reliable?
The price and inventory of SN74AHCT574PWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHCT574PWRG4 is usually 5 days.
3.What payment methods are accepted for SN74AHCT574PWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHCT574PWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AHCT574PWRG4?
SN74AHCT574PWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHCT574PWRG4 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 SN74AHCT574PWRG4?
For technical support, including SN74AHCT574PWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHCT574PWRG4 requirements.
6.How does Aetrix verify that SN74AHCT574PWRG4 is sourced from the original manufacturer or authorized distributors?
All SN74AHCT574PWRG4 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 SN74AHCT574PWRG4 meets industry standards.
7.What is the process for return or replacement of SN74AHCT574PWRG4?
All SN74AHCT574PWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHCT574PWRG4, 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 SN74AHCT574PWRG4 part is unused and in its original packaging.
Return procedure for SN74AHCT574PWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74AHCT574PWRG4 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…
