Overview
The CD74HC273M is a high-speed octal D-Type flip-flop integrated circuit manufactured by Texas Instruments. It is part of the HC and HCT series, known for their low power consumption and compatibility with CMOS and TTL logic. This device is fabricated using silicon-gate CMOS technology, ensuring low power consumption and high noise immunity. The CD74HC273M features eight D-Type flip-flops, each controlled by a common clock (CLK) and a common reset (CLR) input. Information at the D input is transferred to the Q outputs on the positive-going edge of the clock pulse, and resetting is accomplished by a low voltage level independent of the clock.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 2 to 6 | V |
| Operating Temperature Range | –55 to 125 | ℃ |
| Maximum Clock Frequency | 60 | MHz |
| Propagation Delay (Clock to Output) | 30 to 45 | ns |
| Input Rise and Fall Time | 2 to 1000 | ns |
| Input Capacitance | 10 | pF |
| Quiescent Device Current | 8 to 160 | μA |
| Package Type | SOIC (20) | |
| Body Size (Nominal) | 12.80 mm × 7.50 mm |
Key Features
- Common clock and asynchronous controller reset
- Positive edge triggering
- Buffered inputs
- Fanout capability: up to 10 LSTTL loads for standard outputs and up to 15 LSTTL loads for bus driver outputs
- Wide operating temperature range: –55℃ to 125℃
- Balanced propagation delay and transition times
- Significant power reduction compared to LSTTL logic ICs
- High noise immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V for HC types
- Direct LSTTL input logic compatibility for HCT types
Applications
- Digital logic circuits requiring synchronized data storage
- Counters and shift registers
- Sequential logic circuits
- Alarm and tamper detect circuits
- General-purpose digital systems where low power consumption and high speed are required
Q & A
- What is the CD74HC273M used for? The CD74HC273M is used in digital logic circuits for synchronized data storage, counters, shift registers, and other sequential logic applications.
- What is the operating voltage range of the CD74HC273M? The operating voltage range is from 2 V to 6 V.
- What is the maximum clock frequency of the CD74HC273M? The maximum clock frequency is up to 60 MHz.
- How many D-Type flip-flops does the CD74HC273M contain? The CD74HC273M contains eight D-Type flip-flops.
- What is the package type of the CD74HC273M? The package type is SOIC (20 pins).
- What is the body size of the CD74HC273M? The body size is 12.80 mm × 7.50 mm.
- What is the propagation delay from clock to output for the CD74HC273M? The propagation delay ranges from 30 to 45 ns.
- Does the CD74HC273M have high noise immunity? Yes, it has high noise immunity with NIL = 30%, NIH = 30% of VCC at VCC = 5V for HC types.
- Is the CD74HC273M compatible with TTL logic? Yes, the HCT types are directly compatible with TTL input logic.
- What is the recommended bypass capacitor for the power supply? A 0.1-μF capacitor is recommended, and it is acceptable to parallel multiple bypass caps to reject different frequencies of noise.
