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Texas Instruments SN74LVC74APWRE4
- Part No.:
- SN74LVC74APWRE4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC74APWRE4.pdf
- Description:
- IC FF D-TYPE DUAL 1BIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,285
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Product details
Overview
SN74LVC74APWRE4 from Texas Instruments is a dual positive-edge-triggered D-type flip-flop with independent preset and clear inputs, operating from 1.65V to 3.6V supply, delivering 5.2ns max propagation delay at 3.3V, and supporting 5.5V-tolerant inputs for mixed-voltage interfacing in digital control logic circuits.
For engineers reviewing the SN74LVC74APWRE4 datasheet, SN74LVC74APWRE4 pinout, SN74LVC74APWRE4 application, or SN74LVC74APWRE4 equivalent, key selection criteria include its dual-channel edge-triggered storage capability, 14-pin TSSOP package footprint, wide VCC range compatibility, and guaranteed operation across –40°C to 125°C industrial temperature range.
Technical Context
The SN74LVC74APWRE4 implements two independent CMOS D flip-flops, each with asynchronous active-low preset (PRE) and clear (CLR), synchronous positive-edge clock (CLK), data (D), true (Q), and complement (Q) outputs. Its overvoltage-tolerant inputs enable level translation between 1.8V/2.5V/3.3V domains without external circuitry.
Timing behavior is defined by setup (tsu = 3.6ns min at 1.8V), hold (th = 1ns), and propagation delay (tpd ≤ 7.1ns at 1.8V), with maximum clock frequency of 83MHz at 1.8V and 100MHz at 3.3V under –40°C to 125°C conditions. Latch-up immunity exceeds 250mA per JESD17.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.65V to 3.6V - supports single-supply operation across 1.8V, 2.5V, and 3.3V logic families. |
| Input Voltage Tolerance | Up to 5.5V - enables safe interfacing with higher-voltage controllers without level shifters. |
| Max Propagation Delay | 5.2ns at VCC = 3.3V - ensures tight timing margins in high-speed synchronous logic designs. |
| Operating Temperature | –40°C to 125°C - qualified for industrial and automotive under-hood applications. |
| Output Drive Strength | ±24mA at VCC = 3V - sufficient to drive multiple LVC loads or moderate PCB traces directly. |
| ESD Protection | ±2000V HBM, ±1000V CDM - meets robust handling requirements for automated assembly lines. |
| Power Dissipation Cap | 26pF per flip-flop at VCC = 3.3V - enables accurate dynamic power estimation in clocked systems. |
Pinout & Package
TSSOP-14 (PW) package: 5.0mm × 4.4mm body size, 0.65mm lead pitch, exposed pad optional, RoHS-compliant matte tin lead finish, moisture sensitivity level 1 (unlimited floor life at ≤30°C/60% RH).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1CLK, 2CLK | Positive-edge clock input | Synchronizes data capture on rising edge; threshold voltage-based triggering, not slew-rate dependent. |
| 1D, 2D | Data input | Samples and transfers to Q/Q outputs when PRE/CLR are high and CLK rises. |
| 1PRE, 2PRE | Asynchronous preset input | Active-low: forces Q = H, Q = L regardless of clock or data state. |
| 1CLR, 2CLR | Asynchronous clear input | Active-low: forces Q = L, Q = H regardless of clock or data state. |
| 1Q, 2Q | True output | Reflects stored D value after CLK↑ if PRE/CLR inactive; drives standard LVC loads. |
| 1Q, 2Q | Inverted output | Complement of Q; enables direct implementation of toggle or set-reset functions. |
| VCC | Supply rail | Single power source for both flip-flops; requires local 0.1µF bypass capacitor. |
| GND | Ground reference | Common return path; must be low-impedance to minimize ground bounce (VOLP < 0.8V). |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent D flip-flops | Enables compact implementation of 2-bit registers, counters, or synchronized data paths in one IC. |
| 1.65V–3.6V VCC operation | Eliminates need for separate voltage regulators in multi-rail systems using 1.8V/2.5V/3.3V supplies. |
| 5.5V-tolerant inputs | Permits direct connection to legacy 5V microcontrollers or FPGAs without external translators. |
| Low ground bounce (VOLP < 0.8V) | Reduces noise coupling into adjacent analog or RF sections in mixed-signal PCB layouts. |
| Industrial temperature range | Supports reliable operation in motor drives, factory automation, and telecom infrastructure equipment. |
Applications
| Frequency Divider | Digital Control Register |
|---|---|
Use Scenario: Dividing a 100MHz system clock to generate a stable 50MHz peripheral clock. IC Role / Device Role / Timing Role: Each flip-flop configured as a toggle (Q→D feedback) to halve input frequency on Q output. Use Value: Achieves precise 2× division with no external components, leveraging internal edge-triggered behavior and sub-6ns delay. |
Use Scenario: Storing configuration bits for an industrial I/O module during power-up initialization. IC Role / Device Role / Timing Role: Dual flip-flop holds two independent control states (e.g., enable/disable + mode select) synchronized to a system reset pulse. Use Value: Provides glitch-free, metastability-resistant storage with asynchronous PRE/CLR for deterministic startup behavior. |
| Bus Interface Synchronizer | State Machine Sequencer |
Use Scenario: Synchronizing asynchronous interrupt signals from external sensors into a 3.3V FPGA domain. IC Role / Device Role / Timing Role: First-stage synchronizer using cascaded flip-flops to suppress metastability before feeding FPGA logic. Use Value: Leverages 1.65V–3.6V compatibility and 5.5V-tolerant inputs to accept raw sensor outputs while matching FPGA I/O voltage. |
Use Scenario: Implementing a 4-state sequence controller for a stepper motor driver's phase logic. IC Role / Device Role / Timing Role: Two SN74LVC74APWRE4 devices provide four total Q outputs, defining unique state codes on each CLK edge. Use Value: Enables deterministic, clock-gated state transitions with predictable 5.2ns delay, critical for timing-critical motion control loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC74ADBR | SSOP-14 package (6.2mm × 7.8mm); 140.4°C/W RθJA; identical electrical specs and pinout. | Requires larger PCB area and different reflow profile due to wider lead spacing and thermal mass. | Select when SSOP footprint is already standardized in legacy designs or when manual soldering is preferred. |
| 74LVC74A,118 (Nexperia) | Same logic function and 1.65–3.6V range; slightly higher max tpd (6.5ns @ 3.3V); TSSOP-14 compatible pinout. | Validated for extended-life industrial use but lacks TI's documented latch-up >250mA rating. | Choose for cost-sensitive volume production where TI qualification is not mandatory and 1.3ns timing margin is acceptable. |
Compared with SN74LVC74APWRE4, SN74LVC74ADBR offers identical functionality in a larger SSOP package suited for prototyping or legacy layouts, while 74LVC74A,118 provides a second-source option with minor timing trade-offs and distinct reliability documentation-both require no logic redesign but differ in thermal performance and qualification scope.
Availability
SN74LVC74APWRE4 is available at Aetrix Electronics and suitable for industrial automation, telecom infrastructure, and medical device applications requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.
Supply support for SN74LVC74APWRE4 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 decades of experience in high-reliability industrial and automotive-grade components.
The SN74LVC74APWRE4 belongs to TI's LVC (Low-Voltage CMOS) logic family, designed specifically for low-power, high-speed, mixed-voltage digital interfacing in space-constrained industrial and communications systems.
FAQ
What is the minimum supply voltage required for reliable operation of SN74LVC74APWRE4?
The SN74LVC74APWRE4 is specified to operate down to 1.65V VCC across its full temperature range (–40°C to 125°C). At 1.65V, it maintains functional timing with tpd ≤ 7.1ns and supports 4mA output drive. Operation below 1.65V is not characterized and may result in undefined behavior or failure to meet setup/hold timing.
Can SN74LVC74APWRE4 safely interface with 5V logic outputs?
Yes - the SN74LVC74APWRE4 features 5.5V-tolerant inputs, meaning its D, CLK, PRE, and CLR pins can accept up to 5.5V regardless of VCC level (1.65V–3.6V). This allows direct connection to 5V microcontrollers or legacy peripherals without level-shifting circuitry, provided VCC remains within specification.
Does SN74LVC74APWRE4 support asynchronous reset and preset functions?
Yes - SN74LVC74APWRE4 includes dedicated active-low asynchronous inputs: 1CLR/2CLR force Q = L and Q = H, while 1PRE/2PRE force Q = H and Q = L. These functions operate independently of the clock and take priority over data inputs, enabling immediate state initialization or fault recovery.
What is the maximum clock frequency supported by SN74LVC74APWRE4 at 3.3V?
At VCC = 3.3V and TA = –40°C to 85°C, the SN74LVC74APWRE4 supports up to 150MHz clock frequency. Under extended temperature (–40°C to 125°C), the maximum rated frequency is 100MHz. These values are validated per TI's switching characteristics tables and assume proper load and layout conditions.
Is SN74LVC74APWRE4 pin-compatible with other TSSOP-14 dual D flip-flops?
SN74LVC74APWRE4 follows the industry-standard 14-pin TSSOP pinout for dual D flip-flops (e.g., 74LVC74, 74HC74), with identical CLK/D/CLR/PRE/Q/Q assignments. However, voltage ranges, timing, and drive strength differ - always verify functional equivalence and timing margins before substitution.
SN74LVC74APWRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Set(Preset) and Reset
- Type:
- D-Type
- Output Type:
- Complementary
- Number of Elements:
- 2
- Number of Bits per Element:
- 1
- Clock Frequency:
- 150 MHz
- Max Propagation Delay @ V, Max CL:
- 5.2ns @ 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:
- 5 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
SN74LVC74APWRE4 FAQ
1.How can I place an order for SN74LVC74APWRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC74APWRE4 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 SN74LVC74APWRE4 reliable?
The price and inventory of SN74LVC74APWRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC74APWRE4 is usually 5 days.
3.What payment methods are accepted for SN74LVC74APWRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC74APWRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC74APWRE4?
SN74LVC74APWRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC74APWRE4 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 SN74LVC74APWRE4?
For technical support, including SN74LVC74APWRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC74APWRE4 requirements.
6.How does Aetrix verify that SN74LVC74APWRE4 is sourced from the original manufacturer or authorized distributors?
All SN74LVC74APWRE4 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 SN74LVC74APWRE4 meets industry standards.
7.What is the process for return or replacement of SN74LVC74APWRE4?
All SN74LVC74APWRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC74APWRE4, 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 SN74LVC74APWRE4 part is unused and in its original packaging.
Return procedure for SN74LVC74APWRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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