My Inquiry
My Account
Texas Instruments SN74HC374DWRG4
- Part No.:
- SN74HC374DWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74HC374DWRG4.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,997
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74HC374DWRG4 from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, operating across 2 V to 6 V. It features eight independent D-flip-flops synchronized on the rising clock edge, ±6-mA output drive at 5 V, 14 ns typical propagation delay, and 80-µA max ICC-used in bidirectional bus drivers and I/O port buffering for industrial control and data acquisition systems.
For engineers reviewing the SN74HC374DWRG4 datasheet, SN74HC374DWRG4 pinout, SN74HC374DWRG4 application, or SN74HC374DWRG4 equivalent, key selection criteria include 3-state output timing (ten/tdis ≤32 ns at 6 V), wide supply range compatibility, low input current (≤1 µA), and SOIC-20 package thermal resistance (RθJA = 109.1 °C/W).
Technical Context
The SN74HC374DWRG4 implements eight synchronous D-type latches triggered by the positive edge of CLK, with independent data retention during OE assertion. Its 3-state outputs support high-capacitance bus loading without external pull-ups, and internal logic remains fully functional regardless of OE state-enabling concurrent data capture and bus release.
Designed for HC CMOS logic family compatibility, it meets standard TTL load drive capability (up to 15 LSTTL loads), supports full parallel data access, and maintains stable operation across –40°C to +85°C ambient temperature with supply voltage ranging from 2 V to 6 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - enables direct interface with 3.3 V and 5 V logic systems without level shifters |
| Propagation Delay (tpd) | 15 ns max at 6 V - ensures sub-20 ns timing margin for 25 MHz system clocks |
| Output Drive Strength | ±6 mA at 5 V - sufficient to directly drive 15 LSTTL loads without buffer amplification |
| Quiescent Current (ICC) | 80 µA max - supports low-power standby modes in battery-backed or energy-sensitive designs |
| Input Leakage Current | 1 µA max - prevents unintended logic transitions when inputs are pulled via high-value resistors |
| Enable/Disable Time (ten/tdis) | 32 ns max at 6 V - guarantees clean bus arbitration with minimal contention window during state transitions |
Pinout & Package
SN74HC374DWRG4 uses a 20-pin SOIC (DW) package measuring 12.80 mm × 7.50 mm with standard 0.65 mm lead pitch and 2.65 mm body height. The package is RoHS-compliant, moisture sensitivity level 1, and rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–8 (D1–D8) | Data Inputs | Asynchronous parallel data inputs sampled on CLK rising edge; must be stable ≥21 ns before and ≥5 ns after clock edge |
| 9 (GND) | Ground Reference | Common return path for all signals and power; requires low-inductance connection to minimize ground bounce |
| 10–17 (Q1–Q8) | 3-State Outputs | Registered outputs enabled/disabled by OE; high-impedance state isolates bus lines during data transfer conflicts |
| 18 (CLK) | Clock Input | Rising-edge sensitive global clock; accepts 2 V–6 V logic levels with ≤400 ns max input transition time at 6 V |
| 19 (OE) | Output Enable | Active-low control; asserts high-impedance state independently of CLK or D inputs-no effect on internal register state |
| 20 (VCC) | Power Supply | Primary supply rail; requires local 0.1 µF ceramic bypass capacitor placed within 5 mm of pin for noise suppression |
Key Features
| Feature | Design Value |
|---|---|
| Octal D-type flip-flop architecture | Eight independent registers share one clock and OE, enabling compact 8-bit latch implementation without discrete logic duplication |
| 3-state output control | OE-driven high-impedance mode eliminates bus contention in shared-data-path systems such as microcontroller peripheral interfaces |
| Wide supply voltage range | 2 V–6 V operation allows seamless integration into mixed-voltage systems including legacy 5 V and modern 3.3 V domains |
| Low power consumption | 80 µA max ICC enables use in always-on monitoring circuits where quiescent current impacts battery life or thermal design |
| High noise immunity | CMOS input thresholds (VIH = 3.15 V, VIL = 1.35 V at 4.5 V) provide >1.3 V noise margin against EMI in industrial environments |
Applications
| Industrial PLC I/O Expansion | Microcontroller Parallel Bus Interface |
|---|---|
Use Scenario: Expanding digital input/output capacity of programmable logic controllers using shared backplane buses. IC Role / Device Role / Timing Role: Acts as an 8-bit output latch and input buffer, synchronizing field-device signals to the PLC scan cycle via rising-edge clocking. Use Value: Enables deterministic timing control with 15 ns tpd and eliminates need for external bus transceivers due to ±6 mA drive strength. | Use Scenario: Interfacing 8-bit parallel peripherals (e.g., LCD controllers, ADCs) to microcontrollers with limited GPIO resources. IC Role / Device Role / Timing Role: Provides registered data staging between MCU and peripheral, decoupling timing constraints via OE-controlled bus isolation. Use Value: Reduces firmware overhead by offloading data handshaking; 3-state outputs prevent signal contention during read-modify-write sequences. |
| Test Equipment Signal Conditioning | Automated Test Fixture Control |
Use Scenario: Driving multiple relay banks or LED indicators in benchtop test instruments requiring precise timing and load isolation. IC Role / Device Role / Timing Role: Functions as a buffered output register, accepting pattern data from FPGA or MCU and releasing it synchronously to external loads. Use Value: Delivers 6 mA per output to drive relays directly; high-impedance state permits safe reconfiguration without powering down downstream circuitry. | Use Scenario: Controlling fixture actuators and sensors in automated PCB functional testers where multiple DUTs share common control lines. IC Role / Device Role / Timing Role: Serves as a bus-isolated control latch, allowing simultaneous configuration of multiple test stations without crosstalk. Use Value: Enables hot-swappable DUT handling via OE-controlled bus release; 2 V–6 V supply range matches diverse fixture power rails. |
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 |
|---|---|---|---|
| SN74HCT374DWR | TTL-compatible input thresholds (VIH = 2 V min); identical pinout and timing | Better suited for mixed 5 V TTL/CMOS systems where input noise immunity must match legacy logic families | Select when interfacing directly with 74LS or 74F series devices without level translation |
| 74LCX374MTCX | Lower VCC range (2 V–3.6 V); 3.3 V optimized; 5 V tolerant inputs | Targeted for low-voltage portable electronics; not suitable for 5 V-only systems | Choose for battery-powered or 3.3 V embedded systems requiring reduced dynamic power and smaller footprint |
Compared with SN74HC374DWRG4, SN74HCT374DWR offers superior noise margin in 5 V TTL environments but lacks 2 V operation, while 74LCX374MTCX reduces power and voltage headroom at the cost of 5 V system compatibility.
Availability
SN74HC374DWRG4 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, microcontroller parallel bus interface, and automated test fixture control requiring stable component supply and long-term production continuity.
Supply support for SN74HC374DWRG4 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 90 years of innovation in industrial, automotive, and communications markets.
The SN74HC374DWRG4 belongs to TI's 74HC high-speed CMOS logic family, designed specifically for robust, low-power digital interfacing in noise-prone industrial and instrumentation applications.
FAQ
What is the maximum clock frequency supported by SN74HC374DWRG4 at 5 V?
At VCC = 5 V and TA = 25°C, SN74HC374DWRG4 supports a maximum clock frequency of 24 MHz. This value is derived from timing specifications in the official TI datasheet (SCLS141G, section 5.5), where fmax is specified as 24 MHz under recommended operating conditions. Operation above this frequency may result in setup/hold violations or metastability.
Does SN74HC374DWRG4 require external pull-up resistors on the OE pin?
Yes, SN74HC374DWRG4 requires a pull-up resistor on the OE pin to ensure high-impedance outputs during power-up or power-down sequences. TI recommends connecting OE to VCC through a resistor sized according to the driver's current-sinking capability-typically 10 kΩ for standard CMOS drivers-to guarantee reliable bus isolation before internal logic stabilizes.
Can SN74HC374DWRG4 drive standard 5 V TTL loads directly?
Yes, SN74HC374DWRG4 can drive up to 15 LSTTL loads directly at 5 V, as confirmed in its datasheet features and electrical characteristics. Its ±6 mA output drive at 5 V meets the current requirements of LSTTL inputs (IIL = –0.4 mA, IIH = 20 µA), eliminating the need for additional buffer stages in most 5 V logic interfacing scenarios.
What is the thermal resistance (RθJA) of SN74HC374DWRG4 in its SOIC-20 package?
The junction-to-ambient thermal resistance (RθJA) of SN74HC374DWRG4 in the SOIC-20 (DW) package is 109.1 °C/W, as specified in section 5.3 of the TI datasheet (SCLS141G, April 2022 revision). This value assumes standard JEDEC 2-layer board conditions and is critical for calculating maximum allowable power dissipation in thermally constrained layouts.
Is SN74HC374DWRG4 compatible with 3.3 V microcontroller GPIOs?
Yes, SN74HC374DWRG4 is fully compatible with 3.3 V microcontroller GPIOs: its input thresholds (VIH = 2.31 V min at 3.3 V) exceed typical 3.3 V logic high levels (~2.4–3.3 V), and its outputs swing rail-to-rail (VOH ≥ 3.1 V at 3.3 V), ensuring reliable interfacing without level-shifting circuitry in mixed-voltage systems.
SN74HC374DWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 20-SOIC (0.295", 7.50mm 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:
- 70 MHz
- Max Propagation Delay @ V, Max CL:
- 31ns @ 6V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Current - Quiescent (Iq):
- 8 µA
- Input Capacitance:
- 3 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74HC374DWRG4 FAQ
1.How can I place an order for SN74HC374DWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC374DWRG4 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 SN74HC374DWRG4 reliable?
The price and inventory of SN74HC374DWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC374DWRG4 is usually 5 days.
3.What payment methods are accepted for SN74HC374DWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC374DWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HC374DWRG4?
SN74HC374DWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC374DWRG4 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 SN74HC374DWRG4?
For technical support, including SN74HC374DWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC374DWRG4 requirements.
6.How does Aetrix verify that SN74HC374DWRG4 is sourced from the original manufacturer or authorized distributors?
All SN74HC374DWRG4 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 SN74HC374DWRG4 meets industry standards.
7.What is the process for return or replacement of SN74HC374DWRG4?
All SN74HC374DWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC374DWRG4, 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 SN74HC374DWRG4 part is unused and in its original packaging.
Return procedure for SN74HC374DWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74HC374DWRG4 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…
