The HEF4013B is a dual D-type flip-flop which features independent set direct (SD), clear direct (CD), clock inputs (CP) and outputs (O, O). Data is accepted when CP is LOW and transferred to the output on the positive-going edge of the clock. The active HIGH asynchronous clear-direct (CD) and set-direct (SD) are independent and override the D or CP inputs. The outputs are buffered for best system performance. Schmitt-trigger action in the clock input makes the circuit highly tolerant to slower clock rise and fall times.
The HEF4013B is a dual D‑type flip‑flop with independent set‑direct (Sp), clear‑direct (Cp), clock (CP) inputs and buffered outputs. It features Schmitt‑triggered clock input, active‑high asynchronous set and clear, and high‑speed operation.
The datasheet lists electrical characteristics such as propagation delays, setup/hold times, and maximum clock frequency, as well as package options and typical application circuits like counters, shift registers, and ring counters.
| Package types | 14‑lead DIL plastic (HEF4013BP(N)), 14‑lead DIL ceramic (HEF4013BD(F)), 14‑lead SO plastic (HEF4013BT(D)) |
|---|---|
| Input transition time | < 20 ns |
| Maximum clock frequency | 14 MHz |
The HEF4013B is offered in 14‑lead DIL plastic (HEF4013BP(N)), 14‑lead DIL ceramic (HEF4013BD(F)), and 14‑lead SO plastic (HEF4013BT(D)).
Typical applications include counters/dividers, registers, toggle flip‑flops, shift registers, binary ripple up‑counters, and modified ring counters.