onsemi MC74HC595A/MC74HCT595A SISO/SIPO Shift Registers
onsemi MC74HC595A/MC74HCT595A 8-Bit Serial-Input/Serial or Parallel-Output Shift Registers consists of an 8−bit D−type latch with three−state parallel outputs and an 8−bit shift register. The shift register provides a serial output and accepts serial data. The shift register also offers parallel data to the 8−bit latch. The latch and shift register have independent clock inputs. These devices also have an asynchronous reset for the shift register.
The device directly interfaces with the SPI serial data port on CMOS MPUs and MCUs. The onsemi MC74HC595A device inputs are compatible with Standard CMOS outputs. With pull-up resistors, the devices are compatible with TTL outputs. The MC74HCT595A device inputs are compatible with Standard CMOS or TTL outputs.
Features
- Output drive capability of 15 LSTTL loads
- Outputs directly interface to CMOS, NMOS, and TTL
- Operating voltage range of 2.0V to 6.0V (HC), 4.5V to 5.5V (HCT)
- 1.0A low input current
- High noise immunity characteristic of CMOS devices
- In compliance with the requirements defined by JEDEC Standard No. 7A
- Chip complexity of 328 FETs or 82 equivalent gates
- Improvements over HC595/HCT595
- Improved propagation delays
- 50% lower quiescent power
- Improved input noise and latch-up immunity
- -Q suffix for automotive and other applications requiring unique site and control change requirements (AEC−Q100 qualified and PPAP capable)
- These devices are Pb−free, halogen-free, and are RoHS-compliant
Logic Diagram
