74HC595D,118

The 74HC595D is a high-speed CMOS 8-bit serial-in/serial or parallel-out shift register with an internal 8-bit storage register and 3-state parallel outputs (Q0–Q7). Data is shifted into the shift register on the LOW-to-HIGH transition of the shift register clock (SHCP), while data is transferred to the storage register on the LOW-to-HIGH transition of the storage register clock (STCP). An active-LOW Output Enable (OE) places the parallel outputs in a high-impedance OFF-state without affecting the register contents, and an active-LOW Master Reset (MR) asynchronously clears the shift register.

The 74HC595D belongs to Nexperia's 74HC high-speed CMOS logic family and operates over a supply voltage (VCC) range of 2.0 V to 6.0 V with CMOS input logic levels. According to the dynamic characteristics, the device supports a typical maximum operating frequency (fmax) of 91 MHz at VCC = 4.5 V and 108 MHz at VCC = 6.0 V. Table 7 also specifies minimum fmax values of 20 MHz at VCC = 4.5 V and 24 MHz at VCC = 6.0 V over the full −40°C to +125°C operating temperature range. The 3-state parallel outputs can source or sink up to ±6 mA at VCC = 4.5 V.

The 74HC595D is supplied in Nexperia's SOT109-1 (SO16) plastic small-outline package with 16 leads and a 3.9 mm body width. The package has a nominal 1.27 mm (50 mil) lead pitch, a body length of 9.8 mm to 10.0 mm, and a maximum package height of 1.75 mm, making it suitable for standard SO16 PCB footprints.

The ordering code 74HC595D identifies a member of Nexperia's 74HC high-speed CMOS logic family. The device is an 8-bit serial-in/serial or parallel-out shift register with a storage register and 3-state outputs, and the "D" suffix denotes the SO16 (SOT109-1) plastic small-outline package.

The 74HC595D is specified for operation over an ambient temperature range of −40°C to +125°C. The device provides HBM ESD protection exceeding 2,000 V (ANSI/ESDA/JEDEC JS-001 Class 2) and CDM protection exceeding 1,000 V (ANSI/ESDA/JEDEC JS-002 Class C3). The datasheet also notes that the inputs include clamp diodes, enabling the use of current-limiting resistors when interfacing inputs to voltages above VCC.