1. General description

The HEF4894B is a 12-stage serial shift register. It has a storage latch associated with each stage

for strobing data from the serial input (D) to the parallel LED driver outputs (QP0 to QP11). Data is

shifted on positive-going clock (CP) transitions. The data in each shift register stage is transferred

to the storage register when the strobe (STR) input is HIGH. Data in the storage register appears at

the output whenever the output enable (OE) input signal is HIGH.

Two serial outputs (QS1 and QS2) are available for cascading a number of HEF4894B devices.

Serial data is available at QS1 on positive-going clock edges to allow high-speed operation in

cascaded systems with a fast clock rise time. The same serial data is available at QS2 on the next

negative going clock edge. This is used for cascading HEF4894B devices when the clock has a

slow rise time.

It operates over a recommended VDD power supply range of 3 V to 15 V referenced to VSS (usually

ground). Unused inputs must be connected to VDD, VSS, or another input.

2. Features and benefits

? Wide supply voltage range from 3.0 V to 15.0 V

? CMOS low power dissipation

? High noise immunity

? Fully static operation

? 5 V, 10 V, and 15 V parametric ratings

? Standardized symmetrical output characteristics

? Complies with JEDEC standard JESD 13-B

? ESD protection:

? HBM JESD22-A114F exceeds 2000 V

? MM JESD22-A115-B exceeds 200 V

? Specified from -40 °C to +85 °C and from -40 °C to +125 °C

HEF4894BT屬于集成電路（IC） > 移位寄存器。安世半導體(中國)有限公司制造生產(chǎn)的HEF4894BT移位寄存器移位寄存器是低級邏輯器件，通常用于在串行和并行方式之間轉(zhuǎn)換數(shù)字邏輯信號形式的數(shù)據(jù)，或在數(shù)字字內(nèi)移動數(shù)據(jù)位的位置。移位寄存器通常使用集成到一個設(shè)備中的一組觸發(fā)器來實現(xiàn)，常用于集成度更高的邏輯器件，但仍可用于 I/O 擴展等應用，在這些應用中離散形式的函數(shù)可能會非常有用。