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BA6162F-E2

P1-P3P4-P6P7-P9P10-P10
1
Memory ICs
Reset IC with battery backup function
BA6129AF / BA6162 / BA6162F
The BA6129AF, BA6162, and BA6162F are reset ICs with a battery backup function, designed for equipment using
SRAMs and other similar components. These ICs are configured of a reset signal and CS signal output unit and a
power supply switching unit. If the BA6129AF detects that the power supply has dropped to 3.5V or lower, it outputs
the CS, CSB, and Reset signals to set the SRAM in backup mode. If the voltage drops to 3.3V or lower, the power
supply switches to the battery. With the BA6162 and BA6162F, in the same way, a power supply of 4.2V is detected,
and if the voltage drops to 3.3V or lower, the power supply switches to the battery. These ICs allow SRAMs to be
write protected and allow the system to be reset, in addition to switching between the power supply and the battery.
•
Applications
Equipment using SRAMs (cards, cassettes, facsimile machines, copiers, word processors, personal computers, etc.)
•
Features
1) Equipped with battery backup function.
2) Equipped with both CS signals (CS and CSB) and
Reset signals.
3) Low current dissipation when powered from battery.
4) Low voltage loss when powered from battery.
5) Smooth switching between power supply and bat-
tery.
•
Absolute maximum ratings (Ta = 25°C)
IOUT1 indicates the output current on the VCC side, and IOUT2 the output current on the VBAT side.
Parameter Symbol Limits Unit
Power supply voltage V
CC 7.0 V
Output current 1
I
OUT1
– 80 (BA6129AF)
mA
Output current 2 I
OUT2 – 200 µ
A
Power dissipation
900
∗
1
(BA6162)
550
∗
2
(BA6129AF)
(BA6162F)
mW
Operating temperature – 20 ~ + 75 °C
Storage temperature – 40 ~ + 125 °C
Topr
Pd
Tstg
∗
1 Reduced by 9.0mW for each increase in Ta of 1°C over 25°C.
∗
2 Reduced by 5.5mW for each increase in Ta of 1°C over 25°C.
– 40 (BA6162 / BA6162F)
+
–
+
–
+
–
8765
4321
N.C. Vo CSB
CSResetGND
V
REF
V
BAT
VCC
2
Memory ICs BA6129AF / BA6162 / BA6162F
•
Input / output circuit
Pin 2
Reset
output
Pin 3
CS output
Pin 5
CSB output
Pin 6
Power supply
output
Pin 4
Battery
power supply
Pin 8
Power supply
(V
CC)
Pin 6
Power supply
output
GND
2 6
GND
5
GND
GND
8
4
6
3
VCC VCC VCC
•
Pin descriptions
Pin name Function
1 GND Substrate GND
2 Reset Reset output
3CSCS output
4 Battery power supply
5 CSB CSB output
6V
O Power supply output
7
8 Power supply voltage
V
BAT
VCC
Pin No.
N.C.
—
•
Block diagram
3
Memory ICs BA6129AF / BA6162 / BA6162F
Parameter Symbol Min. Typ. Max. Unit Conditions
I
CC
——
2.0 mA V
CC
=
5V, V
BAT
=
3V
V
SAT1
—
0.03 0.05 V V
CC
=
5V, V
BAT
=
3V, I
O
= –
1mA
V
O1
4.95 4.97
—
VV
CC
=
5V, V
BAT
=
3V, I
O
= –
1mA
V
O2
4.70 4.90
—
VV
CC
=
5V, V
BAT
=
3V, I
O
= –
15mA
V
O3
4.50 4.86
—
VV
CC
=
5V, V
BAT
=
3V, I
O
= –
30mA
V
S
3.35 3.50 3.65 V V
CC
=
H
→
L
V
SH
—
100
—
mV V
CC
=
L
→
H
V
RESL
——
0.4 V V
CC
=
3V
I
RESH
——
0.1
µ
A
V
OPL
—
0.8 1.2 V V
CC
=
H
→
L, V
RES
⬉
0.4V
V
CSL
——
0.1 V V
CC
=
3V, V
BAT
=
3V, I
CS
= +
1
µ
A
V
CSH
4.9
——
VV
CC
=
5V, V
BAT
=
3V, I
CS
= –
1
µ
A
V
CSBL
——
0.1 V V
CC
=
5V, V
BAT
=
3V, I
CSB
= +
1
µ
A
V
CSBH
Vo
–
0.1
——
VV
CC
=
3V, V
BAT
=
3V, I
CSB
= –
1
µ
A
—
—
V
S
–
0.05
—
+ 0.05 %
/
°C
V
B
3.15 3.30 3.45 V V
CC
=
H
→
L, V
BAT
=
3V, R
O
=
200k
Ω
V
BH
—
100
—
mV V
CC
=
L
→
H, V
BAT
=
3V, R
O
=
200k
Ω
V
B
–
0.05
—
+ 0.05 %
/
°C
I
CCB
——
0.5
µ
AV
CC
=
GND, V
BAT
=
3V
V
SAT2
—
0.20 0.30 V V
CC
=
GND, V
BAT
=
3V, I
O
= –
1
µ
A
V
O4
2.70 2.80
—
VV
CC
=
GND, V
BAT
=
3V, I
O
= –
1
µ
A
V
O5
2.60 2.67
—
VV
CC
=
GND, V
BAT
=
3V, I
O
= –
100
µ
A
I
OR
——
0.1
µ
AV
CC
=
5V, V
BAT
=
GND
V
CC
=
5V, VR
RES
=
7V
(Note) I
O
, I
CS
, and I
CSB
are
+
when flowing toward the pin and
–
when flowing away from the pin.
䊊
Not designed for radiation resistance.
V
O6
V
CC
– 0.5
——
V I
O
= –
80mA
No-load current
dissipation
I / O voltage differential 1
Vo output voltage 1
Vo output voltage 2
Vo output voltage 3
Detection voltage
Detection hysteresis voltage
Reset output
low level
voltage
Reset leakage current
Reset operating limit voltage
CS output
low level
voltage
CS output
high level
voltage
CSB output
low level
voltage
CSB output
high level
voltage
Detection voltage temperature characteristic
Switching voltage
Switching hysteresis voltage
Switching voltage temperature characteristic
Backup current
dissipation
I / O voltage differential 2
Vo output voltage 4
Vo output voltage 5
Vo output voltage 6
Reverse current
•
Electrical characteristics
BA6129AF (unless otherwise noted, Ta = 25°C, VR
RES = VCC = 5V, RRES = 10kΩ)
P1-P3P4-P6P7-P9P10-P10

BA6162F-E2

Mfr. #:
Buy BA6162F-E2
Manufacturer:
Description:
Supervisory Circuits IC W/BACKUP 7V
Lifecycle:
New from this manufacturer.
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