Datasheet

January 1995 2
Philips Semiconductors Product specification
Monostable/astable multivibrator
HEF4047B
MSI
DESCRIPTION
The HEF4047B consists of a gatable astable multivibrator
with logic techniques incorporated to permit positive or
negative edge-triggered monostable multivibrator action
with retriggering and external counting options.
Inputs include + TRIGGER, − TRIGGER, ASTABLE,
ASTABLE, RETRIGGER and MR (Master Reset).
Buffered outputs are O, O and OSCILLATOR OUTPUT. In
all modes of operation an external capacitor (C
t
) must be
connected between C
TC
and RC
TC
, and an external
resistor (R
t
) must be connected between R
TC
and
RC
TC
(continued on next page).
FAMILY DATA, I
DD
LIMITS category MSI
See Family Specifications
Fig.1 Functional diagram.