SN74HCT273DWRE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
SN74HCT273DWRE4 is an 8-bit D-type positive-edge-triggered flip-flop IC in a 20-pin SOIC package, operating from a 4.5 V to 5.5 V supply. It features synchronous clock input with asynchronous master reset, a maximum clock frequency of 20 MHz, and TTL-compatible inputs. Used for bus interface latching, data storage, and pipeline registers in digital systems.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- SN74HCT273DWRE4 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 SN74HCT273DWRE4?
- 8-bit D-type positive-edge-triggered flip-flop
- 4.5 V to 5.5 V HCT supply range
- TTL-compatible input thresholds
- Asynchronous active-low master reset
- 20 MHz maximum clock frequency
- 20-pin SOIC surface-mount package
What is SN74HCT273DWRE4 used for?
The SN74HCT273DWRE4 is used for 8-bit data latching and bus interfacing in microprocessor and FPGA systems requiring TTL-compatible logic with 5 V operation. Its synchronous clocking and asynchronous reset make it suitable for pipeline register stages, output port latches, and address hold circuits in digital control boards. The device also serves as a data bus buffer register in industrial PLCs and embedded systems where reliable 8-bit state storage at 20 MHz is needed.
What are the specifications of SN74HCT273DWRE4?
| YTEOL | 0 |
| Family | HCT |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | D FLIP-FLOP |
| Max Frequency@Nom-Sup | 20000000Hz |
| 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 | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Prop. Delay@Nom-Sup | 50ns |
| Propagation Delay (tpd) | 42ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| 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 | 23MHz |
| 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 SN74HCT273DWRE4 datasheet?
SN74HCT273DWRE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74HCT273DWRE4?
Compatible alternatives and drop-in replacements for SN74HCT273DWRE4:
Flip-Flop, HCT Series, 8-Func, Positive Edge Triggered, 8-Bit, True Output, CMOS, PDSO20
Flip-Flop, HCT Series, 1-Func, Positive Edge Triggered, 8-Bit, True Output, CMOS, PDSO20
D Flip-Flop, HCT Series, 1-Func, Positive Edge Triggered, 8-Bit, True Output, CMOS, PDSO20
Frequently Asked Questions
How many bits does the SN74HCT273DWRE4 store and at what maximum clock frequency?
The SN74HCT273DWRE4 stores 8 bits per clock cycle using positive-edge-triggered D flip-flops, operating at a maximum clock frequency of 20 MHz from a 4.5 V to 5.5 V supply. Its 8 independent Q outputs can drive up to 4 mA each, making it suitable for direct connection to bus lines in TTL-compatible digital systems.
Does the SN74HCT273DWRE4 support asynchronous reset, and how does it affect stored data?
Yes, the SN74HCT273DWRE4 includes an active-low asynchronous master reset (MR) pin that clears all 8 flip-flop outputs to logic 0 independently of the clock signal. This reset can be asserted at any time to initialize the register state during system power-up sequences or fault recovery without waiting for a clock edge.
Is the SN74HCT273DWRE4 compatible with 3.3 V logic inputs from a microcontroller or FPGA?
The SN74HCT273DWRE4 uses HCT-family TTL-compatible input thresholds with a VIH of 2 V and VIL of 0.8 V, so it accepts 3.3 V logic outputs from most microcontrollers and FPGAs while operating the device itself from a 5 V supply. This makes it a convenient level-shifting latch in mixed 3.3 V/5 V system designs without extra buffer components.
For a bus-interface latch application, how many SN74HCT273DWRE4 devices are needed to hold a 16-bit data bus?
Two SN74HCT273DWRE4 devices are needed to latch a 16-bit data bus, as each IC provides 8 flip-flop outputs in a 20-pin SOIC package. Both devices can share a common clock and reset signal, and their parallel 8-bit outputs combine to drive the full 16-bit bus at up to 20 MHz from a shared 5 V power rail.
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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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