My Inquiry
My Account
STMicroelectronics 74LVX273TTR
- Part No.:
- 74LVX273TTR
- Manufacturer:
- STMicroelectronics
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74LVX273TTR.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,222
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74LVX273TTR from STMicroelectronics is a low-voltage CMOS octal D-type flip-flop with asynchronous clear, designed for 3.3V logic systems requiring 5V-tolerant inputs, 150 MHz max clock frequency (typ.), 4 µA max quiescent current, and symmetrical 4 mA output drive. It serves as a synchronous data latch in bus interface and control register applications.
For engineers reviewing the 74LVX273TTR datasheet, 74LVX273TTR pinout, 74LVX273TTR application, or 74LVX273TTR equivalent, key selection criteria include 2V–3.6V operating range, 0.8V/2.0V input thresholds, balanced tPLH/tPHL propagation delays, and TSSOP-20 package compatibility with legacy 74-series footprint.
Technical Context
This device implements eight edge-triggered D flip-flops sharing a common clock and asynchronous active-low clear. Each stage transfers D-input data to Q-output on the rising edge of CLOCK, with CLEAR overriding all other inputs to force Q outputs low regardless of clock or data state.
Input protection enables safe operation with 0–7V input voltages independent of VCC, supporting 5V-to-3.3V level translation. The sub-micron C2MOS process delivers low noise (0.3V typical VOLP), high latch-up immunity, and 2 kV ESD protection on all I/O pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage | 2.0–3.6 V - Enables direct use in 3.3V systems with 1.2V data retention during power-down |
| Max Clock Frequency | 150 MHz (typ.) at VCC = 3.3V - Supports high-speed synchronous latching in timing-critical control paths |
| Input Voltage Range | 0–5.5 V - Allows interfacing with 5V logic without external level shifters |
| Output Drive | ±4 mA (min) at VCC = 3.0V - Ensures robust fan-out to multiple CMOS loads under worst-case conditions |
| Quiescent Current | 4 µA (max) at TA = 25°C - Critical for battery-powered and ultra-low-power standby modes |
| Propagation Delay | 7.1 ns (tPLH, typ.) at VCC = 3.3V, CL = 15 pF - Guarantees tight timing margins in high-frequency register chains |
| Input Thresholds | VIL = 0.8 V, VIH = 2.0 V at VCC = 3.0V - Provides 0.7V noise margin for reliable switching in noisy environments |
Pinout & Package
TSSOP-20 package: 6.5 mm × 4.4 mm body, 0.65 mm pitch, 1.05 mm max height, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CLEAR | Asynchronous active-low reset - forces all Q outputs low immediately, independent of clock or data |
| 2,5,6,9,12,15,16,19 | Q0–Q7 | Registered outputs - retain last clocked D-input value until next rising clock edge or CLEAR assertion |
| 3,4,7,8,13,14,17,18 | D0–D7 | Data inputs - sampled on rising edge of CLOCK; 5V-tolerant with no external clamping required |
| 11 | CLOCK | Positive-edge-triggered clock - initiates synchronous transfer of Dn to Qn only on rising transition |
| 10 | GND | Ground reference - must be connected to system 0V plane for stable logic thresholds and noise immunity |
| 20 | VCC | Positive supply - powers internal logic; accepts 2.0–3.6V with full functionality and 1.2V data retention |
Key Features
| Feature | Design Value |
|---|---|
| 5V-tolerant inputs | Accepts 0–5.5V signals with no damage or functional degradation, enabling mixed-voltage board design |
| Power-down input protection | Inputs remain safe up to 7V even when VCC = 0V - prevents back-powering and latch-up during hot-insertion |
| Symmetrical output drive | |IOH| = IOL = 4 mA (min) ensures matched rise/fall times and reduces signal skew across Q outputs |
| Balanced propagation delays | tPLH ≅ tPHL minimizes duty-cycle distortion in clocked feedback paths and timing-critical state machines |
| ESD immunity | 2 kV HBM rating on all pins - eliminates need for external transient suppression in industrial control interfaces |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Latching sensor status and actuator commands in real-time control loops with deterministic timing. IC Role / Device Role / Timing Role: Synchronous register holding digital input states and output enable signals under microcontroller supervision. Use Value: 7.1 ns typical propagation delay and 150 MHz max clock rate ensure sub-microsecond response in safety-critical sequencing. | Use Scenario: Isolating 5V sensor signals (e.g., door switch, seat position) into 3.3V MCU domain while maintaining EMC robustness. IC Role / Device Role / Timing Role: Level-translating input capture register with fail-safe CLEAR for system reset coordination. Use Value: 0–5.5V input tolerance and 2 kV ESD immunity eliminate external protection components and reduce BOM count. |
| Communications Backplane Buffers | Medical Diagnostic Equipment Control Logic |
Use Scenario: Synchronizing parallel data streams between FPGA-based protocol engines and legacy ASIC peripherals. IC Role / Device Role / Timing Role: Clock-domain crossing register with guaranteed setup/hold times (4.5 ns/1.0 ns at 3.3V). Use Value: Balanced tPLH/tPHL and <1.5 ns output skew maintain data integrity across multi-bit buses at >100 MHz. | Use Scenario: Holding configuration bits for analog front-end calibration and safety interlock states in Class II devices. IC Role / Device Role / Timing Role: Nonvolatile register element with 1.2V data retention during brown-out events. Use Value: 4 µA max ICC enables >10-year battery life in portable diagnostic tools with periodic wake-up cycles. |
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 |
|---|---|---|---|
| SN74LVC273PWR | Lower max fMAX (110 MHz), higher ICC (10 µA), same TSSOP-20 footprint | Optimized for 1.65–3.6V operation but lacks 5V input tolerance | Select when strict 3.3V-only interface is used and cost sensitivity outweighs voltage flexibility |
| 74ALVC273MTCX | Higher speed (200 MHz), tighter skew (0.3 ns), but requires 2.3–3.6V and has no 5V-tolerant inputs | Targeted at high-performance FPGA glue logic where timing closure is critical | Choose for sub-ns skew requirements in test equipment or high-speed instrumentation |
Compared with SN74LVC273PWR and 74ALVC273MTCX, the 74LVX273TTR uniquely supports 5V input tolerance and 2V minimum VCC, making it the only option for mixed-voltage industrial interfaces requiring both ultra-low ICC and robust level translation.
Availability
74LVX273TTR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, communications backplane buffers, and medical diagnostic equipment requiring stable component supply and long-term lifecycle support.
Supply support for 74LVX273TTR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in microcontrollers, power management, analog ICs, and discrete devices for industrial, automotive, and consumer markets.
The 74LVX series targets low-voltage, low-power 3.3V logic applications with 5V-tolerant inputs, emphasizing interoperability between legacy and modern voltage domains in cost-sensitive embedded systems.
FAQ
Is the 74LVX273TTR pin-compatible with standard 74HC273 or 74LS273?
Yes - the 74LVX273TTR maintains identical pinout and logic function with the 74-series 273 family, including CLEAR, CLOCK, D0–D7, and Q0–Q7 assignments. However, its 2.0–3.6V operating range and 5V-tolerant inputs differ electrically from 5V-only HC/LS variants, requiring voltage domain verification in mixed designs.
What is the minimum VCC required to retain valid Q-output states?
The 74LVX273TTR retains stored data down to 1.2V VCC, as specified in the Recommended Operating Conditions table. Below this threshold, output states become undefined; however, the device remains undamaged and resumes normal operation upon VCC restoration above 2.0V.
Can the CLEAR input be driven by a 5V signal while VCC = 3.3V?
Yes - the CLEAR input is 5V-tolerant and accepts 0–5.5V signals regardless of VCC level. When VCC = 3.3V, a 5V CLEAR signal will correctly assert the asynchronous reset function without damaging the device or requiring external resistors or clamps.
Does the 74LVX273TTR support hot-swap or live-insertion scenarios?
Yes - its power-down protection allows all inputs to safely accept 0–7V signals even when VCC = 0V, preventing back-powering and latch-up during hot-plug events. This makes it suitable for modular backplanes and field-replaceable I/O cards where connectors mate before power is applied.
74LVX273TTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74LVX
- Package/Case:
- 20-TSSOP (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:
- 90 MHz
- Max Propagation Delay @ V, Max CL:
- 14.5ns @ 3.3V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 4mA, 4mA
- Voltage - Supply:
- 2V ~ 3.6V
- Current - Quiescent (Iq):
- 4 µA
- Input Capacitance:
- 5 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74LVX273TTR FAQ
1.How can I place an order for 74LVX273TTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVX273TTR 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 74LVX273TTR reliable?
The price and inventory of 74LVX273TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVX273TTR is usually 5 days.
3.What payment methods are accepted for 74LVX273TTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVX273TTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVX273TTR?
74LVX273TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVX273TTR 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 74LVX273TTR?
For technical support, including 74LVX273TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVX273TTR requirements.
6.How does Aetrix verify that 74LVX273TTR is sourced from the original manufacturer or authorized distributors?
All 74LVX273TTR 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 74LVX273TTR meets industry standards.
7.What is the process for return or replacement of 74LVX273TTR?
All 74LVX273TTR units undergo pre-shipment inspection (PSI). If there is an issue with 74LVX273TTR, 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 74LVX273TTR part is unused and in its original packaging.
Return procedure for 74LVX273TTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74LVX273TTR 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 and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
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…
