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PDF HCF4541B Data sheet ( Hoja de datos )
| Número de pieza | HCF4541B | |
| Descripción | PROGRAMMABLE TIMER | |
| Fabricantes | STMicroelectronics | |
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16 STAGE BINARI COUNTER
LOW SYMMETRICAL OUTPUT RESISTANCE,
TYPICALLY 100 OHM AT VDD = 15V
OSCILLATOR FREQUENCY RANGE : DC TO
100kHz
AUTO OR MASTER RESET DISABLES OSCIL-
LATOR DURING RESET TO REDUCE POWER
DISSIPATION
OPERATES WITH VERY SLOW CLOCK RISE
AND FALL TIMES
BUILT-IN LOW-POWER RC OSCILLATOR
EXTERNAL CLOCK (applied to pin 3) CAN BE
USED INSTEAD OF OSCILLATOR
OPERATES AS 2N FREQUENCY DIVIDER OR
AS A SINGLE-TRANSITION TIMER
Q/Q SELECT PROVIDES OUTPUT LOGIC
LEVEL FLEXIBILITY
CAPABLE OF DRIVING SIX LOW POWER TTL
LOADS, THREE LOW-POWER SCHOTTKY
LOADS, PR SIX HTL LOADS OVER THE
RATED TEMPERATURE RANGE
SYMMETRICAL OUTPUT CHARAC-
TERISTICS
100% TESTED FOR QUIESCENT CURRENT
AT 20V
5-10-15V PARAMETRIC RATINGS
MEETS ALL REQUIREMENTS OF JEDEC TEN-
TATIVE STANDARD N 13A, ”STANDARD SPE-
CIFICATIONS FOR DESCRIPTION OF ’ B ’
SERIES CMOS DEVICES”
D ESC RI PTI O N
The HCC/HCF4541B Programmable Timer is com-
posed of a 16-stage binary counter, an oscillator
controlled by 2 external resistors and a capacitor, an
output control logic and an automatic power-on
reset circuit. The counter varies on positive-edge
clock transation and it can be cleared by the MAS-
TER RESET input. The output from this timer is the
Q or Q output from the 8th, 13th, or 16th counter
stage. The choice of the stage depends on the time-
select inputs A or B (see frequency selection table).
The output is available in one of the two modes that
can be selected via the MODE input, pin 10 (see
truth table). The output turns out as a continuous
square wave, with a frequency equal to the oscillator
frequency divided by 2N. When this MODE input is
November 1996
HCC4541B
HCF4541B
PROGRAMMABLE TIMER
EY F
(Plastic Package) (Ceramic Frit Seal Package)
M1 C1
(Micro Package)
(Plastic Chip Carrier)
ORDER CODES :
HCC4541 BF
HCF4541 BEY
HCF4541 BM1
HCF4541 BC1
PIN CONNECTION (top view)
1/11
1 page  
HCC/HCF4541B
DYNAMIC ELECTRICAL CHARACTERISTICS (Tamb = 25°C, CL = 50pF, RL = 200kΩ,
typical temperature coefficient for all VDD values is 0.3%/°C, all input rise and fall time = 20ns)
Symb o l
Parameter
(28) Propagation Delay Time
tPHL Clock to Q
tPLH
(216)
tPHL
tPLH
tTHL Transition Time
tTLH
Master Reset, Clock Pulse Width
fCL Maximum Clock Pulse Input Frequency
tr, tf Maximum Clock Pulse Input Rise or Fall Time
VDD
(V)
5
10
15
5
10
15
5
10
15
5
10
15
5
10
15
5
10
15
5
10
15
Min.
900
300
225
Valu es
T yp .
3.5
1.25
0.9
6
3.5
2.5
100
50
40
180
90
65
300
100
85
1.5
4
6
Max.
10.5
3.8
2.9
18
10
7.5
200
100
80
360
180
130
Unlimited
Unit
µs
µs
ns
ns
MHz
µs
5/11
5 Page 
HCC/HCF4541B
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express
written approval of SGS-THOMSON Microelectonics.
© 1996 SGS-THOMSON Microelectronics - Printed in Italy - All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
Australia - Brazil - Canada - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands -
Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A
.
11/11
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| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet HCF4541B.PDF ] | |
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