The MM74HC573 is a high-speed CMOS octal transparent latch with 3-STATE outputs manufactured by Fairchild/ON Semiconductor. It is pin-compatible with low-power Schottky TTL (LSTTL) devices while offering significantly improved performance due to its CMOS technology. This device contains eight D-type latches with a common Enable (E) input and a common Output Enable (OE) input.

Applications:

• Buffer Registers
• Address Latches for Microprocessors
• Data Storage
• I/O Ports

Features:

• High Speed: tpd = 13 ns (typ.) at VCC = 5V
• Low Power Dissipation: ICC = 4 μA (max.) at TA = 25°C
• High Noise Immunity: VIH = 2V (min.), VIL = 0.8V (max.)
• 3-STATE Outputs
• Pin and Function Compatible with 74LS573
• Fanout of 10 LSTTL Loads
• Wide Operating Temperature Range: -40°C to +85°C

Benefits:

• Increased system speed due to fast propagation delay
• Reduced power consumption for energy-efficient designs
• Improved noise margin for reliable operation in noisy environments
• Versatile interface with other logic families due to 3-STATE outputs
• Direct replacement for LSTTL devices, simplifying upgrades
• High fanout capability allows driving a large number of loads
• Reliable performance in a wide range of operating conditions

Additional Details:

The MM74HC573 operates from a supply voltage (VCC) of 2V to 6V. When the Enable (E) input is HIGH, the Q outputs follow the data (D) inputs. When E is LOW, the outputs are latched and remain unchanged. When the Output Enable (OE) input is LOW, the outputs are enabled. When OE is HIGH, the outputs are in a high-impedance (Hi-Z) state. The device is available in various packages, including DIP and SOIC. The CMOS technology ensures very low input current, minimizing the load on driving circuits. The wide operating temperature range makes it suitable for industrial applications. The 3-STATE outputs allow multiple devices to share the same bus.