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Texas Instruments SN74AHCT273DGVRE4
- Part No.:
- SN74AHCT273DGVRE4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AHCT273DGVRE4.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,297
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Product details
Overview
SN74AHCT273DGVRE4 from Texas Instruments is an octal positive-edge-triggered D-type flip-flop with asynchronous clear, TTL-compatible inputs (VIH = 2 V, VIL = 0.8 V), 8 independent data inputs and outputs, and operation across –40°C to 125°C at 4.5–5.5 V supply. It serves as a synchronous storage register in 5 V digital systems requiring precise edge-triggered state capture, such as CPU register files and bus interface latching.
For engineers reviewing the SN74AHCT273DGVRE4 datasheet, SN74AHCT273DGVRE4 pinout, SN74AHCT273DGVRE4 application, or SN74AHCT273DGVRE4 equivalent, this page delivers verified electrical specs (tPLH = 7.5 ns, fMAX = 120 MHz @ CL = 15 pF), package mapping (TVSOP-20, 6.5 mm × 6.4 mm), thermal metrics (RθJA = 118.1°C/W), ESD ratings (2000 V HBM), and validated alternatives for register-level logic design.
Technical Context
This device implements eight independent D-type flip-flops sharing a common clock (CLK) and asynchronous clear (CLR) input. Each flip-flop transfers data from its D input to Q output on the rising edge of CLK, with CLR overriding clock action to force Q low regardless of CLK or D state.
Its TTL-voltage-compatible inputs enable direct interfacing with legacy 3.3 V logic in mixed-supply 5 V systems without level shifters. The CMOS output stage provides rail-to-rail swing (VOH ≥ 3.94 V, VOL ≤ 0.44 V at IOL = 8 mA) and controlled edge rates to minimize ringing on lightly loaded PCB traces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures stable operation in standard 5 V logic rails with ±10% tolerance. |
| Propagation Delay (tPLH) | 7.5 ns (typ) at CL = 15 pF - Enables reliable 120 MHz clocking in high-speed register applications. |
| Output Drive | ±8 mA - Sufficient for driving multiple TTL loads or short PCB traces without external buffering. |
| Input Compatibility | TTL-level: VIH = 2 V, VIL = 0.8 V - Directly accepts 3.3 V logic outputs in 5 V systems without translation. |
| Operating Temperature | –40°C to +125°C - Qualified for industrial and extended-temperature embedded control environments. |
| ESD Rating (HBM) | 2000 V - Meets JEDEC JS-001 for robust handling in automated assembly and field service. |
| Power Dissipation Cap. | 27 pF - Predicts dynamic power consumption under 1 MHz switching with no load. |
Pinout & Package
SN74AHCT273DGVRE4 is packaged in a 20-pin TVSOP (DGV) with body dimensions 6.50 mm × 4.40 mm and overall footprint 6.50 mm × 6.4 mm. Pin 1 is located in Quadrant Q1 per TI tape-and-reel specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CLR | Asynchronous active-low clear - Forces all Q outputs low immediately, independent of CLK. |
| 2 | 1Q | Output of first flip-flop - Reflects stored state of 1D on prior CLK↑ edge. |
| 3 | 1D | Data input for first flip-flop - Sampled only on rising CLK edge if CLR is high. |
| 4 | 2D | Data input for second flip-flop - Independent of other D inputs; enables parallel loading. |
| 5 | 2Q | Output of second flip-flop - Provides synchronized storage for 2D signal path. |
| 10 | GND | Ground reference - Must be connected to system ground plane for noise immunity and timing stability. |
| 11 | CLK | Positive-edge clock - Triggers simultaneous sampling of all eight D inputs on rising transition. |
| 20 | VCC | Power supply - Requires local 0.1 µF bypass capacitor placed within 2 mm of pin for clean switching. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-input compatibility | Accepts 3.3 V logic levels directly in 5 V systems - eliminates need for discrete level translators in mixed-voltage designs. |
| Asynchronous clear | Single-pin global reset - synchronizes all eight registers to known state without waiting for clock edge. |
| Low-output ringing | Controlled drive strength and edge rate - reduces EMI and signal integrity issues on unterminated traces. |
| Latch-up immunity | >250 mA per JESD17 - ensures robustness against transient current faults in noisy industrial environments. |
| Wide temperature range | –40°C to +125°C operation - supports deployment in automotive engine bays and industrial motor drives. |
Applications
| Buffered Data Latching | Bus Interface Register |
|---|---|
Use Scenario: Capturing parallel data from a microcontroller's GPIO port before transferring to a slower peripheral. IC Role / Device Role / Timing Role: Synchronous register holding 8-bit data until next transfer cycle; CLK aligns capture to system timing. Use Value: Prevents metastability and ensures deterministic setup/hold timing (tsu = 5 ns, th = 0 ns) between controller and peripheral clocks. |
Use Scenario: Isolating and staging address/data signals between a 5 V FPGA and legacy 5 V memory subsystem. IC Role / Device Role / Timing Role: Bidirectional bus latch providing clean, edge-aligned data handoff with glitch-free enable via CLR. Use Value: Eliminates bus contention risk through guaranteed low-impedance output drive (±8 mA) and fast tPLH/tPHL matching. |
| Pattern Generation | Industrial Control Sequencing |
Use Scenario: Generating fixed test patterns for LED matrix scanning or stepper motor phase sequencing. IC Role / Device Role / Timing Role: Eight-bit pattern store updated on each CLK pulse; CLR resets sequence to initial state. Use Value: Enables repeatable, jitter-free waveform generation up to 120 MHz with minimal external components. |
Use Scenario: Holding safety-critical I/O states in PLC modules during watchdog timeout or firmware update. IC Role / Device Role / Timing Role: Nonvolatile register bank preserving output states across reset events using CLR-controlled initialization. Use Value: Guarantees fail-safe behavior via immediate, clock-independent state reset (CLR propagation delay ≤ 11.6 ns). |
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 |
|---|---|---|---|
| SN74AHCT574PWRE4 | Octal D-type transparent latch (latch-enable instead of edge-triggered clock); identical voltage/temperature specs. | Suitable for data capture during active-high enable windows rather than clock-edge sampling. | Select when system requires gated latching instead of synchronous edge-triggered storage. |
| SN74AHC273PWR | AHC family: higher speed (tPLH = 5.1 ns), lower drive (±8 mA same), but non-TTL-compatible inputs (VIH = 3.5 V min). | Requires level-shifting for 3.3 V inputs; better for pure 5 V or 3.3 V-only systems. | Choose for faster timing budgets where input voltage compatibility is not required. |
Compared with SN74AHCT273DGVRE4, SN74AHCT574PWRE4 trades edge-triggered reliability for enable-gated flexibility, while SN74AHC273PWR improves speed at the cost of 3.3 V interface support-making SN74AHCT273DGVRE4 optimal for mixed-voltage, edge-sensitive register applications.
Availability
SN74AHCT273DGVRE4 is available at Aetrix Electronics and suitable for industrial control systems, embedded computing interfaces, and communications infrastructure equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74AHCT273DGVRE4 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 U.S.-based semiconductor company specializing in analog and embedded processing technologies, with over 90 years of innovation in logic, power management, and signal chain solutions.
SN74AHCT273DGVRE4 belongs to the AHCT logic family designed for TTL-compatible 5 V digital systems requiring robust noise immunity, wide temperature operation, and seamless integration with legacy and mixed-voltage architectures.
FAQ
What is the maximum clock frequency supported by SN74AHCT273DGVRE4?
The SN74AHCT273DGVRE4 supports a maximum clock frequency of 120 MHz under typical conditions (VCC = 5 V, CL = 15 pF, TA = 25°C). At higher load capacitance (CL = 50 pF), the practical limit drops to 75 MHz. These values derive directly from measured tPLH/tPHL and setup/hold timing margins specified in the official TI datasheet SCLS375G.
Does SN74AHCT273DGVRE4 support 3.3 V input signals?
Yes, SN74AHCT273DGVRE4 supports 3.3 V input signals because its inputs are TTL-voltage compatible: VIH is specified at 2.0 V minimum and VIL at 0.8 V maximum. This allows direct connection to 3.3 V logic outputs without level-shifting circuitry, making SN74AHCT273DGVRE4 ideal for mixed-voltage 5 V system designs.
What package type is used for SN74AHCT273DGVRE4?
SN74AHCT273DGVRE4 uses the TVSOP-20 (DGV) package: a 20-pin thin very small outline package with body dimensions 6.50 mm × 4.40 mm and overall footprint 6.50 mm × 6.4 mm. It features RoHS-compliant NiPdAu lead finish and moisture sensitivity level 1 (260°C peak reflow).
How does the asynchronous clear (CLR) function in SN74AHCT273DGVRE4?
In SN74AHCT273DGVRE4, the asynchronous clear (CLR) input forces all eight Q outputs low immediately upon assertion (low state), regardless of CLK activity or D input values. Its propagation delay is specified at ≤11.6 ns (CL = 50 pF), enabling rapid, deterministic system reset without dependency on clock edges.
Is SN74AHCT273DGVRE4 suitable for automotive applications?
SN74AHCT273DGVRE4 itself is not AEC-Q100 qualified; however, its automotive-grade counterpart SN74AHCT273-Q1 is available for automotive use. The SN74AHCT273DGVRE4 operates across –40°C to +125°C and meets industrial reliability standards, but designers requiring certified automotive qualification must select the Q1 variant instead of SN74AHCT273DGVRE4.
SN74AHCT273DGVRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHCT
- Package/Case:
- 20-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 75 MHz
- Max Propagation Delay @ V, Max CL:
- 9.2ns @ 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:
- 2.5 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TVSOP
SN74AHCT273DGVRE4 FAQ
1.How can I place an order for SN74AHCT273DGVRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHCT273DGVRE4 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 SN74AHCT273DGVRE4 reliable?
The price and inventory of SN74AHCT273DGVRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHCT273DGVRE4 is usually 5 days.
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SN74AHCT273DGVRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHCT273DGVRE4 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 SN74AHCT273DGVRE4?
For technical support, including SN74AHCT273DGVRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHCT273DGVRE4 requirements.
6.How does Aetrix verify that SN74AHCT273DGVRE4 is sourced from the original manufacturer or authorized distributors?
All SN74AHCT273DGVRE4 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 SN74AHCT273DGVRE4 meets industry standards.
7.What is the process for return or replacement of SN74AHCT273DGVRE4?
All SN74AHCT273DGVRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHCT273DGVRE4, 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 SN74AHCT273DGVRE4 part is unused and in its original packaging.
Return procedure for SN74AHCT273DGVRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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