SN74HC594

Features:

·8-Bit Serial-In, Parallel-Out Shift Registers With Storage
·Independent Direct Overriding Clears on Shift and Storage Registers
·Independent Clocks for Both Shift and Storage Registers
·High-Current Outputs Can Drive Up to 15 LSTTL Loads
·Package Options Include Plastic
·Small-Outline (D), Shrink Small-Outline (DB), and Ceramic Flat (W) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs


Pinout




Specifications

Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5 V to 7 V
Input clamp current, IIK (VI < 0 or VI > VCC) (see Note 1)  . . . . . . . . . . . . . . . . . . . . . . . . .±20 mA
Output clamp current, IOK (VO < 0 or VO > VCC) (see Note 1)  . . . . . . . . . . . . . . . . . . . . . .±20 mA
Continuous output current, IO (VO = 0 to VCC)  . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . .±35 mA
Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . .±70 mA
Package thermal impedance, qJA (see Note 2): D package  . . . . . . . . . . . . . . . . . . . . . . . .113°C/W
                                                                           DB package  . . . . . . . . . . . . . . . . . . . . . . .131°C/W
                                                                           N package  . . . . . . . . . . . . . . . . . . . . . . . . .78°C/W
Storage temperature range, Tstg  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65°C to 150°C


Description

The SN74HC594 devices contain an 8-bit serial-in, parallel-out shift register that feeds an 8-bit D-type storage register. Separate clocks and direct overriding clear (RCLR, SRCLR) inputs are provided on both the shift and storage registers. A serial (QH4) output is provided for cascading purposes.

Both the shift register (RCLK) and storage register (SRCLK) clocks of the SN74HC594 are positive edge triggered. If both clocks are connected together, the shift register is always one count pulse ahead of the storage register.

The parallel (QAQH) outputs have high-current capability. QH4 is a standard output.

The SN74HC594 is characterized for operation over the full military temperature range of 55°C to 125°C. The SN74HC594 is characterized for operation from 40°C to 85°C.