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HEF4541B डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - Programmable timer - NXP

भाग संख्या HEF4541B
समारोह Programmable timer
मैन्युफैक्चरर्स NXP 
लोगो NXP लोगो 
पूर्व दर्शन
1 Page
		
<?=HEF4541B?> डेटा पत्रक पीडीएफ

HEF4541B pdf
Philips Semiconductors
Programmable timer
Product specification
HEF4541B
MSI
DESCRIPTION
The HEF4541B is a programmable timer which consists of
a 16-stage binary counter, an integrated oscillator to be
used with external timing components, an automatic
power-on reset and output control logic. The frequency of
the oscillator is determined by the external components
Rt and Ct within the frequency range 1 Hz to 100 kHz. This
oscillator may be replaced by an external clock signal at
input RS, the timer advances on the positive-going
transition of RS. A LOW on the auto reset input (AR) and
a LOW on the master reset input (MR) enables the internal
power-on reset. A HIGH level at input MR resets the
counter independent on all other inputs. Resetting
disables the oscillator to provide no active power
dissipation.
A HIGH at input AR turns off the power-on reset to provide
a low quiescent power dissipation of the timer. The
16-stage counter divides the oscillator frequency by
28, 210, 213 or 216 depending on the state of the address
inputs (A0, A1). The divided oscillator frequency is
available at output O. The phase input (PH) features a
complementary output signal. If the mode select input
(MODE) is LOW or HIGH the timer can be used
respectively as a single transition timer or 2n frequency
divider.
Fig.1 Functional diagram.
Fig.2 Pinning diagram.
January 1995
HEF4541BP(N): 14-lead DIL; plastic
(SOT27-1)
HEF4541BD(F): 14-lead DIL; ceramic (cerdip)
(SOT73)
HEF4541BT(D): 14-lead SO; plastic
(SOT108-1)
( ): Package Designator North America
FAMILY DATA, IDD LIMITS category MSI
See Family Specifications
2

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