Overview
The CD74HC273ME4, produced by Texas Instruments, is an octal positive-edge triggered D-type flip-flop integrated circuit. This device is manufactured using silicon-gate CMOS technology, which ensures low power consumption and high speed operation. The CD74HC273ME4 features a common clock (CLK) and a common reset (CLR) input, allowing all eight flip-flops to be controlled simultaneously. The reset function is asynchronous, meaning it can reset the outputs to a logic 0 independent of the clock signal.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCC (Supply Voltage) | 2.0 | 6.0 | V | ||
| VIH (High Level Input Voltage) | VCC = 4.5 V to 5.5 V | 2.0 | V | ||
| VIL (Low Level Input Voltage) | VCC = 4.5 V to 5.5 V | 0.8 | V | ||
| VOH (High Level Output Voltage) | IOH = -20 μA, CMOS loads | 4.4 | V | ||
| VOL (Low Level Output Voltage) | IOL = 20 μA, CMOS loads | 0.1 | V | ||
| II (Input Leakage Current) | VI = VCC or GND | ±1 | μA | ||
| ICC (Quiescent Device Current) | VI = VCC or GND | 160 | μA | ||
| tPLH, tPHL (Propagation Delay, Clock to Output) | CL = 50 pF, VCC = 4.5 V | 30 | 45 | ns | |
| tSU (Set-up Time, Data to Clock) | VCC = 4.5 V | 12 | 18 | ns | |
| tH (Hold Time, Data to Clock) | VCC = 4.5 V | 3 | ns | ||
| fMAX (Maximum Clock Frequency) | CL = 15 pF | 60 | MHz | ||
| 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
- High noise immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V for HC types
- Direct LSTTL input logic compatibility for HCT types: VIL = 0.8 V (max), VIH = 2 V (min)
- CMOS input compatibility for HCT types: II ≤ 1 μA at VOL, VOH
- ESD protection: HBM JESD22-A114F exceeds 2000 V, MM JESD22-A115-A exceeds 200 V
Applications
- Digital logic circuits requiring high-speed and low power consumption
- Sequential logic circuits such as counters, shift registers, and memory elements
- Interface circuits between different logic families due to its compatibility with both CMOS and TTL levels
- Industrial control systems, automotive electronics, and other applications requiring robust and reliable flip-flop functionality
Q & A
- What is the CD74HC273ME4?
The CD74HC273ME4 is an octal positive-edge triggered D-type flip-flop integrated circuit manufactured by Texas Instruments.
- What is the operating voltage range of the CD74HC273ME4?
The operating voltage range is from 2.0 V to 6.0 V.
- What is the maximum clock frequency of the CD74HC273ME4?
The maximum clock frequency is up to 60 MHz with a load capacitance of 15 pF.
- How many flip-flops does the CD74HC273ME4 contain?
The device contains eight positive-edge triggered D-type flip-flops.
- What is the reset function of the CD74HC273ME4?
The reset function is asynchronous, meaning it can reset the outputs to a logic 0 independent of the clock signal.
- What are the key features of the CD74HC273ME4 in terms of noise immunity and power consumption?
The device has high noise immunity and significant power reduction compared to LSTTL logic ICs.
- What are the input and output voltage levels for the CD74HC273ME4?
The high-level input voltage (VIH) is 2.0 V, and the low-level input voltage (VIL) is 0.8 V. The high-level output voltage (VOH) is 4.4 V, and the low-level output voltage (VOL) is 0.1 V.
- What is the operating temperature range of the CD74HC273ME4?
The operating temperature range is from -55℃ to 125℃.
- Does the CD74HC273ME4 have ESD protection?
Yes, it has ESD protection: HBM JESD22-A114F exceeds 2000 V, MM JESD22-A115-A exceeds 200 V.
- What are some common applications of the CD74HC273ME4?
Common applications include digital logic circuits, sequential logic circuits, interface circuits, industrial control systems, and automotive electronics.
