My Inquiry
My Account
Texas Instruments SN74AHC74PWRG4
- Part No.:
- SN74AHC74PWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AHC74PWRG4.pdf
- Description:
- IC FF D-TYPE DUAL 1BIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,580
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74AHC74PWRG4 from Texas Instruments is a dual positive-edge-triggered D-type flip-flop with independent preset (PRE) and clear (CLR) inputs, operating across 2 V to 5.5 V supply range, supporting clock frequencies up to 110 MHz at 5 V, and delivering ±8 mA output drive. It implements synchronous data latching per channel and is used in digital logic control, clock division, and signal debouncing circuits.
For engineers reviewing the SN74AHC74PWRG4 datasheet, SN74AHC74PWRG4 pinout, SN74AHC74PWRG4 application, or SN74AHC74PWRG4 equivalent, key selection considerations include its TSSOP-14 package, dual-channel edge-triggered behavior, active-low asynchronous controls, guaranteed timing margins at industrial temperature (–40°C to +125°C), and compatibility with mixed-voltage 3.3 V/5 V systems.
Technical Context
The SN74AHC74PWRG4 integrates two independent D-type flip-flops sharing no internal coupling-each with dedicated CLK, D, PRE, CLR, Q, and Q̅ terminals. Clock triggering occurs on the rising voltage threshold of CLK, not dependent on edge slew rate, enabling robust operation with slow or noisy clocks when paired with external Schmitt triggers.
Each flip-flop supports asynchronous set/reset via low-active PRE and CLR pins that override clock and data inputs. When both PRE and CLR are high, data at D transfers to Q on the next positive clock edge, provided setup (5 ns min at 5 V) and hold (0.5 ns) times are met. Output states remain stable between clock edges, supporting reliable storage in control and sequencing logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 5.5 V - enables direct interface with 3.3 V and 5 V logic families without level shifters |
| Max Clock Frequency | 110 MHz at VCC = 5 V, CL = 15 pF - supports high-speed divide-by-2 clock generation and data sampling |
| Output Drive Strength | ±8 mA at VCC = 5 V - sufficient to drive multiple 74AHC inputs or moderate capacitive loads (≤50 pF) |
| Propagation Delay | 4.6 ns (tPLH, CLK→Q, VCC = 5 V) - ensures tight timing budgets in synchronous state machines |
| Input Thresholds | VIH = 3.85 V, VIL = 1.65 V at VCC = 5.5 V - provides 0.65 V noise margin for TTL-compatible signaling |
| ESD Protection | ±2000 V HBM, ±1000 V CDM - meets industrial handling requirements without additional protection circuitry |
| Operating Temperature | –40°C to +125°C - qualified for automotive under-hood and industrial motor-control environments |
Pinout & Package
TSSOP-14 (PW) package: 4.4 mm × 5.0 mm body, 0.65 mm pitch, exposed pad optional, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1CLK, 2CLK | Asynchronous clock input (rising-edge sensitive) | Triggers data transfer from D to Q on voltage-threshold crossing; immune to slow rise/fall times |
| 1D, 2D | Data input | Samples and holds value at next active clock edge if PRE/CLR inactive; requires 5 ns setup before CLK↑ at 5 V |
| 1PRE, 2PRE | Active-low preset | Forces Q = HIGH regardless of CLK/D state; overrides all synchronous functions when pulled LOW |
| 1CLR, 2CLR | Active-low clear | Forces Q = LOW regardless of CLK/D state; operates independently per channel |
| 1Q, 2Q | True output | Reflects stored D value after clock edge; drives loads up to ±8 mA at 5 V |
| 1Q̅, 2Q̅ | Inverted output | Complementary to Q; enables direct implementation of toggle mode when fed back to D |
| VCC | Positive supply | Power rail for logic core and I/O; bypassing with 0.1 µF capacitor near pin required for noise immunity |
| GND | Ground reference | Return path for all currents; must be low-impedance to maintain VOL ≤ 0.5 V under 8 mA sink |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent flip-flops | Enables compact implementation of two-bit registers or separate control paths without inter-channel timing dependency |
| Asynchronous PRE/CLR | Allows immediate initialization or reset of each channel without waiting for clock edge-critical for system startup and fault recovery |
| Wide VCC range (2–5.5 V) | Permits single-supply operation across legacy 5 V and modern 3.3 V systems, reducing BOM count in mixed-voltage designs |
| High noise immunity | Guaranteed 0.65 V input hysteresis margin at 5.5 V supports reliable operation in electrically noisy motor-drive or power-conversion environments |
| Low dynamic power | ICC ≤ 20 µA at 5.5 V enables use in battery-backed or always-on logic monitoring applications with minimal quiescent drain |
Applications
| Toggle Switch Emulation | Controller Reset Hold |
|---|---|
Use Scenario: Replacing mechanical toggle switches with momentary pushbuttons in space-constrained user interfaces or industrial HMIs. IC Role / Device Role / Timing Role: SN74AHC74PWRG4 configured in toggle mode (D tied to Q̅) converts each button press into a clean, debounced output state change. Use Value: Eliminates mechanical wear, reduces PCB area by >70%, and enables firmware-independent hardware-level state retention during power cycling. | Use Scenario: Maintaining valid I/O states during microcontroller reset sequences in PLC modules or sensor nodes. IC Role / Device Role / Timing Role: SN74AHC74PWRG4 stores critical enable/disable flags using PRE/CLR to force known outputs while the host MCU initializes. Use Value: Prevents spurious actuator activation or bus contention during boot-up, meeting IEC 61508 functional safety requirement for deterministic reset behavior. |
| Noise-Tolerant Signal Conditioning | Divide-by-2 Clock Generation |
Use Scenario: Interfacing slow-rising or EMI-corrupted signals (e.g., from limit switches or relay contacts) to high-speed digital controllers. IC Role / Device Role / Timing Role: SN74AHC74PWRG4 acts as a synchronized sampler-external RC filter shapes input, then CLK edge captures clean logic level. Use Value: Achieves >10 kV/m radiated immunity without ferrites or complex filtering; eliminates false triggers in factory automation settings. | Use Scenario: Generating half-frequency clocks for peripheral interfaces (e.g., UART baud rate derivation or ADC sampling clocks). IC Role / Device Role / Timing Role: SN74AHC74PWRG4 wired as toggle flip-flop (D→Q̅, CLK→input clock) produces precise 50% duty-cycle output with zero jitter accumulation. Use Value: Delivers sub-nanosecond edge alignment stability over temperature and voltage-superior to RC-based dividers in precision timing applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual D-flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC74APWR | Lower VCC range (1.65–5.5 V); 32 mA drive; higher ICC (max 10 µA vs. 20 µA) | Better suited for 1.8 V logic domains and higher fanout; less optimal for 2 V operation or ultra-low-power standby | Select when interfacing with LVC-family peripherals or requiring stronger drive into heavy capacitive loads |
| MC74HC74ADTR2G | Same pinout; wider temp range (–55°C to +125°C); slower max fCLK (25 MHz at 5 V) | Preferred for extended-temperature military/aerospace use but unsuitable for >25 MHz clock division | Choose only when extreme temperature qualification outweighs speed requirements |
Compared with SN74LVC74APWR and MC74HC74ADTR2G, the SN74AHC74PWRG4 uniquely balances 110 MHz operation, 2 V minimum supply, and industrial temperature rating-making it the optimal choice for cost-sensitive, high-reliability embedded control where both performance and voltage flexibility matter.
Availability
SN74AHC74PWRG4 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and consumer appliance control systems requiring stable component supply across long production lifecycles.
Supply support for SN74AHC74PWRG4 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 high-reliability electronic components.
The SN74AHC74PWRG4 belongs to TI's advanced high-speed CMOS (AHC) logic family, designed specifically for low-power, high-noise-immunity digital control in industrial and automotive applications where timing precision and voltage flexibility are critical.
FAQ
What is the maximum clock frequency supported by the SN74AHC74PWRG4?
The SN74AHC74PWRG4 supports a maximum clock frequency of 110 MHz when operated at VCC = 5 V with a 15 pF load. This value is specified in the Switching Characteristics table (Section 5.9) of the official datasheet and is validated across the full industrial temperature range (–40°C to +125°C). At 3.3 V, the max frequency drops to 70 MHz due to reduced drive strength.
Does the SN74AHC74PWRG4 require external pull-up resistors on PRE and CLR pins?
No, the SN74AHC74PWRG4 does not require external pull-up resistors on PRE and CLR pins for basic functionality-but unused PRE/CLR inputs must be actively held HIGH (to VCC) to prevent unintended resets. TI's datasheet (Section 5.3) specifies that all unused inputs must be terminated to VCC or GND; floating PRE/CLR pins can cause metastability or erratic output behavior, especially in noisy environments.
Can the SN74AHC74PWRG4 operate reliably at 2.0 V supply voltage?
Yes, the SN74AHC74PWRG4 is fully specified to operate down to 2.0 V supply voltage, as confirmed in Section 5.3 (Recommended Operating Conditions). At 2 V, it delivers 50 µA output drive, supports 1.5 V VIH and 0.5 V VIL thresholds, and maintains functional timing with 7 ns minimum clock pulse width-making it suitable for battery-powered or energy-harvesting systems with brown-out conditions.
What is the thermal resistance (RθJA) of the SN74AHC74PWRG4 in its TSSOP-14 package?
The SN74AHC74PWRG4 in the PW (TSSOP-14) package has a junction-to-ambient thermal resistance (RθJA) of 147.7°C/W, as published in Section 5.4 of the datasheet. This value assumes standard JEDEC 2-layer board conditions; actual thermal performance improves significantly with PCB copper pour and thermal vias beneath the exposed pad (if present), though the PW package variant does not include an exposed thermal pad.
How is toggle-mode operation implemented using the SN74AHC74PWRG4?
Toggle-mode operation is implemented by connecting the inverted output (Q̅) directly to the data input (D) of the same flip-flop channel in the SN74AHC74PWRG4. Each rising edge on CLK then toggles the Q output state. This configuration is explicitly validated in TI's Application Information (Section 8.1) and requires no external logic-enabling compact, low-cost momentary-to-toggle conversion in user interface and control logic.
SN74AHC74PWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Set(Preset) and Reset
- Type:
- D-Type
- Output Type:
- Complementary
- Number of Elements:
- 2
- Number of Bits per Element:
- 1
- Clock Frequency:
- 115 MHz
- Max Propagation Delay @ V, Max CL:
- 9.3ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 5.5V
- Current - Quiescent (Iq):
- 2 µA
- Input Capacitance:
- 2 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
SN74AHC74PWRG4 FAQ
1.How can I place an order for SN74AHC74PWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC74PWRG4 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 SN74AHC74PWRG4 reliable?
The price and inventory of SN74AHC74PWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC74PWRG4 is usually 5 days.
3.What payment methods are accepted for SN74AHC74PWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHC74PWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AHC74PWRG4?
SN74AHC74PWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC74PWRG4 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 SN74AHC74PWRG4?
For technical support, including SN74AHC74PWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC74PWRG4 requirements.
6.How does Aetrix verify that SN74AHC74PWRG4 is sourced from the original manufacturer or authorized distributors?
All SN74AHC74PWRG4 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 SN74AHC74PWRG4 meets industry standards.
7.What is the process for return or replacement of SN74AHC74PWRG4?
All SN74AHC74PWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC74PWRG4, 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 SN74AHC74PWRG4 part is unused and in its original packaging.
Return procedure for SN74AHC74PWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74AHC74PWRG4 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…
