HEF4021BT Shift Shift Register 1 Element 8 Bit Logic IC 16-SOIC

DESCRIPTION

The HEF4021B is an 8-bit static shift register

(parallel-to-serial converter) with a synchronous serial

data input (DS), a clock input (CP), an asynchronous active

HIGH parallel load input (PL), eight asynchronous parallel

data inputs (P0 to P7) and buffered parallel outputs from

the last three stages (05 to O7).

Each register stage is a D-type master-slave flip-flop with

a set direct/clear direct input. Information on P0 to P7 is

asynchronously loaded into the register while PL is HIGH,

independent of CP and DS. When PL is LOW, data on

DS is shifted into the first register position and all the data

in the register is shifted one position to the right on the

LOW to HIGH transition of CP. Schmitt-trigger action in the

clock input makes the circuit highly tolerant to slower clock

rise and fall times

Koben Electronics was founded in 1995 and is located in the Silicon Valley of China, Shenzhen. 

The mission of Koben has always been to provide quality electronics components to manufacturers worldwide. Early on we became a primary conduit for end-of-program and overstock inventory for major distributors such as Future Electronics and contract manufacturers as Flextronics. Koben has since then added sourcing of high quality components from local manufacturers in China.

Koben has always been customer driven rather than opportunity driven. Meaning- we will always choose path that is best for long term relationship with customer over short term view. It is why we have one of the highest customer retention scores of China based distributors.