m51955bl Renesas Electronics Corporation., m51955bl Datasheet - Page 6

• Manufacturer Part Number: m51955bl
• Description: Voltage Detecting, System Resetting Ic Series
• Manufacturer: Renesas Electronics Corporation.

M51955A,B/M51956A,B
Example of Application Circuit
Reset Circuit of M5195xx Series
Notes: 1. When the detecting supply voltage is 4.25 V, M51951, M51952, M51953 and M51954 are used. In this case,
REJ03D0777-0300 Rev.3.00 Sep 18, 2007
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2. When the delay time is short, M51951, M51952, M51955 and M51956 are available. These ICs have a
3. If the M5195xx and the logic circuit share a common power source, type A (built-in load type) can be used
4. The logic circuit preferably should not have a pull-down resistor, but if one is present, add load resistor R
5. When the reset terminal in the logic circuit is of the low reset type, M51951, M51953, M51955 and M51957
6. When a negative supply voltage is used, the supply voltage side of M5195xx and the GND side are
R
When the voltage is anything except 4.25 V, M51955, M51956, M51957 and M51958 are used. In this case,
the detecting supply voltage is 1.25 × (R
set between 2 V and 15 V.
delay capacity and the delay time is about 200 µs.
If a longer delay time is necessary, M51953, M51954, M51957 and M51958 are used. In this case, the delay
time is about 0.34 × Cd (pF) µs.
whether a pull-up resistor is included in the logic circuit or not.
overcome the pull-down resistor.
are used and when the terminal is of the high reset type, M51952, M51954, M51956 and M51958 are used.
connected to negative supply voltage respectively.
1
and R
2
are not necessary.
R
R
1
2
Input
Figure 1 Reset Circuit of M5195xx Series
M51955x
M51956x
Power-
supply
GND
Output
1
+R
2
)/R
2
(V) approximately. The detecting supply voltage can be
R
L
RESET (RESET)
Logic circuit
Power-
supply
GND
V
CC
L
to