Overview
The CD74HC273MG4, produced by Texas Instruments, is a high-speed octal D-Type flip-flop integrated circuit with a direct clear input. It is manufactured using silicon-gate CMOS technology, which ensures low power consumption similar to standard CMOS integrated circuits. This device features eight D-Type flip-flops controlled by a common clock (CLK) and a common reset (CLR). The information at the D input is transferred to the Q outputs on the positive-going edge of the clock pulse. Resetting is accomplished by a low voltage level independent of the clock, resetting all eight Q outputs to a logic 0.
Key Specifications
| Parameter | Condition | Unit | Min | Typ | Max |
|---|---|---|---|---|---|
| Operating Voltage (VCC) | V | 2 | 6 | ||
| Input Voltage (VIH) | HC Types | V | 2 | ||
| Input Voltage (VIL) | HC Types | V | 0.8 | ||
| High Level Output Voltage (VOH) - CMOS Loads | IOH = -20 μA | V | 4.4 | ||
| Low Level Output Voltage (VOL) - CMOS Loads | IOL = 20 μA | V | 0.1 | ||
| Input Leakage Current (II) | VI = VCC or GND | μA | ±0.1 | ±1 | |
| Quiescent Device Current (ICC) | VI = VCC or GND | μA | 8 | 160 | |
| Propagation Delay (tPLH, tPHL) - Clock to Output | CL = 50 pF | ns | 30 | 45 | |
| Maximum Clock Frequency (fMAX) | CL = 15 pF | MHz | 25 | ||
| Operating Temperature Range | ℃ | -55 | 125 |
Key Features
- Common clock and asynchronous controller reset
- Positive edge triggering
- Buffered inputs
- Fanout capability: Standard outputs support 10 LSTTL loads, bus driver outputs support 15 LSTTL loads
- Wide operating temperature range: -55℃ to 125℃
- Balanced propagation delay and transition times
- Significant power reduction compared to LSTTL logic ICs
- HC types: 2 V to 6 V operation, high noise immunity (NIL = 30%, NIH = 30% of VCC at VCC = 5V)
- HCT types: 4.5 V to 5.5 V operation, direct LSTTL input logic compatibility, CMOS input compatibility
Applications
- Sequential logic circuits
- Counters and shift registers
- Memory elements in digital systems
- Timing and control circuits
- General-purpose logic applications requiring low power consumption and high speed
Q & A
- What is the CD74HC273MG4? The CD74HC273MG4 is a high-speed octal D-Type flip-flop integrated circuit with a direct clear input, manufactured by Texas Instruments.
- What is the operating voltage range for the CD74HC273MG4? The operating voltage range is 2 V to 6 V for HC types and 4.5 V to 5.5 V for HCT types.
- How are the flip-flops controlled in the CD74HC273MG4? All eight flip-flops are controlled by a common clock (CLK) and a common reset (CLR).
- What is the propagation delay for the CD74HC273MG4? The propagation delay from clock to output is typically 30 ns to 45 ns for CL = 50 pF.
- What is the maximum clock frequency for the CD74HC273MG4? The maximum clock frequency is 25 MHz for CL = 15 pF.
- What are the key features of the CD74HC273MG4? Key features include common clock and asynchronous controller reset, positive edge triggering, buffered inputs, and significant power reduction compared to LSTTL logic ICs.
- What are the typical applications of the CD74HC273MG4? Typical applications include sequential logic circuits, counters and shift registers, memory elements in digital systems, and timing and control circuits.
- What is the operating temperature range for the CD74HC273MG4? The operating temperature range is -55℃ to 125℃.
- How does the reset function work in the CD74HC273MG4? Resetting is accomplished by a low voltage level independent of the clock, resetting all eight Q outputs to a logic 0.
- What are the differences between HC and HCT types of the CD74HC273MG4? HC types operate from 2 V to 6 V, while HCT types operate from 4.5 V to 5.5 V and have direct LSTTL input logic compatibility.
- What is the fanout capability of the CD74HC273MG4? The standard outputs support 10 LSTTL loads, and bus driver outputs support 15 LSTTL loads.
