1
Memory ICs
System reset IC
BH6150F
The BH6150F has two reset circuits, one detects the power supply voltage, and the other detects the input voltage.
With this one IC it is possible to apply a reset to the logic systems of CPUs, and mechanical systems.
Applications
Personal computers, CPUs, MPUs, logic circuits, reset
circuits for mechanical systems, level detector circuits,
battery voltage detector circuits, and backup power
supply switching circuits
Features
Two types of reset circuit provided.
1) Reset circuit 1 (input voltage detector)
Detection voltage: 1.25V (Typ.)
Transmission delay time: 200
s (Typ.)
Open collector output, and 10k
pull-up resistor on
chip.
2) Reset circuit 2 (supply voltage detector)
Detection voltage: 4.2V (Typ.)
Transmission delay time: 25, 50, 100 and 200 ms
(select using the Ct0 and Ct1 pins)
Manual reset function provided
Open collector output, and 10k
pull-up resistor on
chip.
Absolute maximum ratings (Ta = 25C)
Parameter
Symbol
Limits
Unit
Power supply voltage
Power dissipation
Operating temperature
Storage temperature
V
CC
Pd
Topr
Tstg
V
mW
C
C
Reduced by 4.5mW for each increase in Ta of 1
C over 25
C.
0.3 ~ + 7.0
20 ~ + 75
40 ~ + 125
450
4
Memory ICs
BH6150F
Electrical characteristics (unless otherwise specified V
CC
= 4.5V to 5.5V and Ta = 25C)
Reset circuit 1
Parameter
Symbol
Min.
Typ.
Max.
Unit
Conditions
Detection voltage
Hysteresis voltage
High level transmission delay time
Low level transmission delay time
Output low level voltage
Input voltage range
Input current
V
S1
V
S1
T
PLH1
T
PHL1
V
OL1
V
IN
I
IN
1.20
9
80
--
--
0.3
--
1.25
15
200
10
0.1
--
200
1.30
23
500
--
0.4
V
CC
500
V
mV
s
s
V
V
nA
--
--
--
CL = 100pF
CL = 100pF
V
IN
< 1.2V, I
OL
= 5mA
V
IN
= 1.25V
Reset circuit 2
Parameter
Symbol
Min.
Typ.
Max.
Unit
Conditions
Detection voltage
Hysteresis voltage
High level transmission delay time
Low level transmission delay time
Output low level voltage
Manual reset
Input high level voltage
Input high level current
Input low level voltage
V
S2
V
S2
T
PLH2
T
PHL2
V
OL2
V
RESH
I
RESH
V
RESL
4.0
30
15
30
60
120
--
--
2
--
0.3
4.2
50
25
50
100
200
0.5
0.1
--
20
--
4.4
100
35
70
140
280
--
0.4
V
CC
80
0.8
V
mV
ms
ms
ms
ms
s
V
V
A
V
Ct0 = L, Ct1 = H
Ct0 = H, Ct1 = L
Ct0 = H, Ct1 = H
Ct0 = L, Ct1 = L
CL = 100pF
V
CC
< 4V, I
OL
= 5mA
V
RES
= 2V
CL = 100pF
--
--
--
--
Common specifications
Parameter
Symbol
Min.
Typ.
Max.
Unit
Conditions
Circuit current when off
Circuit current when on
Detection voltage temperature coefficient
Output high level voltage
Operation limit voltage
I
CC1
I
CC2
V
S
/
T
V
OH1,2
V
OPL1,2
--
--
--
V
CC
0.7
--
1000
2
0.01
V
CC
0.4
0.71
1400
3
--
--
0.85
A
mA
% /
C
V
V
V
CC
= 5V, V
IN
> V
S1
V
CC
= 4V, V
IN
< V
S1
I
OH
= 40
A
V
SAT
0.4V, R
L
= 1K
--
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