PT7M7436 Datasheet, PDF (1/6 Pages) Pericom Semiconductor Corporation – Supervisory Circuit

GND 3
GND 3
2 BATT
2 BATT
PT7M7436/37/38
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PT7M7430xx
PT7M7431xx
P_PTS_7Mu₇p₄₃e₂r_xxvisory Circuit
Features
1 GND LBOL ^{D5 escription}
1 GND LBOL 5
 User-Adjustable Low/High Thresholds with The PT7M7436/37/38 are dual-level battery monitors
585mV/615mV Internal Reference
 Low Current (1.5μA typ)
2 NC
with internal hysteresis. These devices are offered with
2 NC
dual low-battery output indicators which can be used to
 Dual Low-Battery Outputs
3 LBOH BATT ⁱ4^{ndicate three battery}3 ^coLⁿB^dOⁱH^tionB^sA^:T^gT^oo4^{d (operate system}
 Push-Pull active low, Open-Drain active low and ^{in normal mode), weak (operate system in low-power}
Open-Drain active high output options
mode), or empty (disable the system).
 90ms Minimum LBOA/LBOL Tim^Pe^To⁷u^Mt ⁷P⁴e³r³iod
PT7M7434
 Immune to Short Battery Voltage Transients
 -40°C to + 85°C Operating Temp¹era^Ht^Tu^Hr^Ie^N Ra^Vn^Cg^Ce ⁵
App^Pl^Ti⁷c^Mat⁷i⁴o³⁵ns
 ¹ M^Ho^Tn^Hi^It^Norin^Vg^CClit⁵hiumion
PT7M7479H
PT7M7479L
(L¹i⁺) ^HTc^Hells ^Vo^Dr^D m⁵ulticell
2 GND
alkaline/ NiCd/ NiMH power supplies.
2 GND
2 GND
Pin Configuration
3 LTHIN _LBO 4
SOT23-6
PT7M7436
PT7M7437
1 HTHIN VCC 6
3 LTHIN LBO 4
PT7M7438
1 HTHIN VCC 6
3 LTH
RST
(/RST) ⁴
PT7M3806M
PT7M3806E
1 RSTSENSE HSENSE 6
2 GND LBOH 5
2 GND LBOH 5
2 GND
LSENSE 5
3 LTHIN LBOL 4
3 LTHIN LBOL 4
3 RESET
VCC 4
Pin Description
Pin
Name
1
HTHIN
2
GND
3
LTHIN
4
LBOL
/LBOL
5
LBOH
/LBOH
6
VCC
Type
I
P
I
O
O
P
Description
HTH Threshold Monitor Input. A resistor-divider network sets the high threshold
associated with LBOH/LBOH.
Ground
LTH Threshold Monitor Input. A resistor-divider network sets the low threshold
associated with LBOL/LBOL.
Low-Battery Output Low. LBOL/LBOL is asserted when LTHIN drops below V_LTHIN-.
It remains asserted for at least 90ms after LTHIN rises above V_LTHIN+. Push-pull output
for PT7M7436, open-drain output for PT7M7437/38.
Low-Battery Output High. LBOH/LBOH is asserted when HTHIN drops below
V_HTHIN. It remains asserted for at least 90ms after HTHIN rises above V_HTHIN+. Push-pull
output for PT7M7436, open-drain output for PT7M7437/38.
Supply Voltage. Device power supply.
12-07-0002
PT0212-6
07/05/12
1