SN74HC273DWE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments SN74HC273DWE4 is an 8-bit D-type positive-edge-triggered flip-flop with asynchronous clear, operating up to 21 MHz from 2 V to 6 V supply. Available in a 20-pin SOIC package for bus register and data pipeline applications.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- SN74HC273DWE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74HC273DWE4?
- 8-bit parallel register with asynchronous clear for simultaneous reset of all flip-flop outputs
- 21 MHz maximum toggle frequency from 2 V to 6 V supply covering 3.3 V and 5 V logic systems
- HC/UH family with 50 pF load capacitance spec for reliable driving of standard bus lines
- 20-pin SOIC package enabling high board density in data register and latch arrays
What is SN74HC273DWE4 used for?
The SN74HC273DWE4 serves as an 8-bit bus register in microprocessor data bus interfaces, output port latches for GPIO expanders, and pipeline registers in FPGA-to-peripheral bridging circuits. Its positive-edge-triggered D flip-flop architecture with asynchronous active-low clear allows deterministic reset of all 8 bits simultaneously during system power-up or fault recovery. The HC family's 2 V to 6 V supply range makes it compatible with both 3.3 V CMOS and 5 V TTL-level logic environments.
What are the specifications of SN74HC273DWE4?
| YTEOL | 0 |
| Additional Feature | DUMMY VAL |
| Family | HC/UH |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | D FLIP-FLOP |
| Max Frequency@Nom-Sup | 21000000Hz |
| Max I(ol) | 0.004A |
| Number of Bits | 8 |
| Number of Functions | 1 |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP20,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Prop. Delay@Nom-Sup | 40ns |
| Propagation Delay (tpd) | 200ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Trigger Type | POSITIVE EDGE |
| fmax-Min | 25MHz |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| HTS Code | 8542.39.00.60 |
Where can I find the SN74HC273DWE4 datasheet?
SN74HC273DWE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74HC273DWE4?
Compatible alternatives and drop-in replacements for SN74HC273DWE4:
Flip-Flop, HC/UH Series, 8-Func, Positive Edge Triggered, 8-Bit, True Output, CMOS, PDSO20
D Flip-Flop, HC/UH Series, 1-Func, Positive Edge Triggered, 8-Bit, True Output, CMOS, PDSO20
Frequently Asked Questions
At what maximum clock frequency can SN74HC273DWE4 reliably toggle in a 5 V system?
At a 5 V supply, the SN74HC273DWE4 is rated for a maximum clock frequency of 21 MHz with a 50 pF load capacitance, sufficient for most parallel bus register applications where data is captured at CPU write-cycle rates below 10 MHz.
How does the asynchronous clear function of SN74HC273DWE4 simplify power-on initialization?
The active-low asynchronous clear input resets all 8 flip-flop outputs to logic 0 independently of the clock, allowing the host system to drive all 8 output pins low in a single cycle during power-on reset without waiting for a clock edge.
Can SN74HC273DWE4 interface directly with 3.3 V FPGA I/O banks driving a 5 V peripheral bus?
The HC family input thresholds scale with supply voltage — at 3.3 V the device accepts a logic-high above approximately 2.3 V, while 5 V CMOS outputs swing to 3.3 V, so level compatibility requires a 3.3 V supply on the SN74HC273DWE4 when driven by 3.3 V FPGA outputs.
For a compact I/O expander design, how many SN74HC273DWE4 devices are needed to latch 32 output bits?
Four SN74HC273DWE4 devices, each storing 8 bits, are needed to latch 32 output bits, and with a shared active-low clear line all 32 outputs can be synchronously reset in a single control assertion without additional glue logic.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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