HEF4001BT
The HEF4001B is a quad 2-input NOR gate. Inputs include clamp diodes. This enables the use of
current limiting resistors to interface inputs to voltages in excess of VDD.
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
HEF4020BT
The HEF4020B is a 14-stage binary ripple counter with a clock input (CP), an overriding
asynchronous master reset input (MR) and 12 buffered parallel outputs (Q0, and Q3 to Q13). The
counter advances on the HIGH-to-LOW transition of CP. A HIGH on MR clears all counter stages
and forces all outputs LOW, independent of the state of CP. Each counter stage is a static toggle
flip-flop. Inputs include clamp diodes. This enables the use of current limiting resistors to interface
inputs to voltages in excess of VDD.
This product has been qualified to the Automotive Electronics Council (AEC) standard Q100
(Grade 3) and is suitable for use in automotive applications.
