PCF1252-0 Philips Semiconductors, PCF1252-0 Datasheet - Page 8

• Manufacturer Part Number: PCF1252-0
• Description: Threshold detector and reset generator
• Manufacturer: Philips Semiconductors

Philips Semiconductors
APPLICATION INFORMATION
1998 Apr 16
handbook, full pagewidth
handbook, full pagewidth
Threshold detector and reset generator
(1) t
(2) t
Fig.9
t R (1)
(ms)
10
10
10
R
S
10
1
10
(typ.) = (0.1 + C
(typ.) = (0.01 + 0.1 C
3
2
1
3
Typical power-on reset circuit for a microcontroller/microprocessor system; (when not used, COMIN must
be connected to V
CT
) ms.
Fig.8 Reset and save times as a function of the external capacitor (C
CT
10
) ms.
( 5 V)
(0 V)
V DD
V SS
2
DD
).
COMIN
SELECT
PCF1252-X
V SS
10
1
RESET
V DD
CT
1 nF
8
1
RESET
V DD
V SS
MICROCONTROLLER/
MICROPROCESSOR
10
MGC923
PCF1252-X family
10
CT
external capacitor (nF)
2
).
Product specification
MGC922
10
10
10
10
10
1
3
t S (2)
(ms)
2
2
1