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Supervisory Circuit. PT7M7437 Datasheet

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Supervisory Circuit. PT7M7437 Datasheet






PT7M7437 Circuit. Datasheet pdf. Equivalent






PT7M7437 Circuit. Datasheet pdf. Equivalent


PT7M7437

Part

PT7M7437

Description

uP Supervisory Circuit



Feature


GND 3 GND 3 2 BATT 2 BATT PT7M7436/3 7/38 ||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||S||||O|||||T|||||2| ||3||||-||5||||||||||| |||||||||||||||| ||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||.
Manufacture

Pericom Technology

Datasheet
Download PT7M7437 Datasheet


Pericom Technology PT7M7437

PT7M7437; |||||||| ||||||||||||||||||||||||||||||| ||||||||||||||||||| PT7M7430xx P S upervisory CircuitPT7M7431xx PT7M7432x x 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/615 mV Internal Reference Low Current (1.5 μA typ) 2 NC with internal hysteresi s. These devices are .


Pericom Technology PT7M7437

offered with 2 NC dual low-battery outpu t indicators which can be used to Dua l Low-Battery Outputs 3 LBOH BATT i4nd icate three battery3 coLnBdOiHtionBsA:T gToo4d (operate system Push-Pull acti ve low, Open-Drain active low and in no rmal mode), weak (operate system in low -power Open-Drain active high output o ptions mode), or empty (disable the sy stem). 90ms Mini.

Part

PT7M7437

Description

uP Supervisory Circuit



Feature


GND 3 GND 3 2 BATT 2 BATT PT7M7436/3 7/38 ||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||S||||O|||||T|||||2| ||3||||-||5||||||||||| |||||||||||||||| ||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||.
Manufacture

Pericom Technology

Datasheet
Download PT7M7437 Datasheet




 PT7M7437
GND 3
GND 3
2 BATT
2 BATT
PT7M7436/37/38
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||S||||O|||||T|||||2|||3||||-||5||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||
PT7M7430xx
P Supervisory CircuitPT7M7431xx
PT7M7432xx
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 i4ndicate three battery3 coLnBdOiHtionBsA:TgToo4d (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 TimPeTo7uMt 7P4e3r3iod
PT7M7434
Immune to Short Battery Voltage Transients
-40°C to + 85°C Operating Temp1eraHtTuHrIeN RaVnCgCe 5
AppPlTi7cMat7i4o35ns
1 MHoTnHiItNorinVgCClit5hiumion
PT7M7479H
PT7M7479L
(L1i+) HTcHells VoDrD 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 VLTHIN-.
It remains asserted for at least 90ms after LTHIN rises above VLTHIN+. Push-pull output
for PT7M7436, open-drain output for PT7M7437/38.
Low-Battery Output High. LBOH/LBOH is asserted when HTHIN drops below
VHTHIN. It remains asserted for at least 90ms after HTHIN rises above VHTHIN+. 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




 PT7M7437
PT7M7436/37/38
P Supervisory Circuit
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Maximum Ratings
Storage Temperature ............................................................-65oC to +150oC
Ambient Temperature with Power Applied.......................... -40oC to +85oC
Supply Voltage to Ground Potential (Vcc to GND) ..............-0.3V to +7.0V
DC Input Voltage (All inputs except Vcc and GND)......-0.3V to VCC+0.3V
DC Output Current (All outputs) ..........................................................20mA
Power Dissipation .............................................................................. 320mW
(Depend on package)
Note:
Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the
device. This is a stress rating only and functional
operation of the device at these or any other condi-
tions above those indicated in the operational sec-
tions of this specification is not implied. Exposure
to absolute maximum rating conditions for extended
periods may affect reliability.
DC Electrical Characteristics
(VCC = 1.8V to 5.5V, TA= -40~85ºC, unless otherwise noted. Typical values are at TA = +25ºC)
Description
Symbol
Test Conditions
Min
Operating Voltage Range
VCC TA= -40~85ºC
VCC Supply Current
Output High Voltage
(Push-Pull only)
Output Low Voltage
Open-Drain Output
Leakage Current
ICC VCC = 3.7V, no load, TA= -40~85ºC
VCC ≥ 1.6V, Isource = 200μA
VOH VCC ≥ 2.7V, Isource = 500μA
VCC ≥ 4.5V, Isource = 800μA
VCC ≥ 1.6V, Isink = 100μA
VOL VCC ≥ 2.7V, Isink = 1.2mA
VCC ≥ 4.5V, Isink = 3.2mA
ILKG
-
Input Leakage Current
ILKG
VHTHIN or VLTHIN > 400mV
User-adjustable Thresholds (PT7M7436/37/38)
HTHIN+ Threshold
(Note 1)
VHTHIN+
HTHIN- Threshold (Note
2)
VHTHIN-
LTHIN+ Threshold (Note
1)
VLTHIN+
LTHIN- Threshold
(Note 2)
VLTHIN-
HTHIN rising, LBOH is
deasserted when HTHIN
rises above 615mV.
HTHIN falling, LBOH is
asserted when HTHIN
falls below VHTHIN-. VREF =
585mV
LTHIN rising, LBOL is
deasserted when LTHIN
rises above VLTHIN+. VREF
= 615mV
LTHIN falling, LBOL is
asserted when LTHIN falls
below VLTHIN-. VREF =
585mV
TA= 25ºC
TA=
-10~85ºC
TA= 25ºC
TA=
-10~85ºC
TA= 25ºC
TA=
-10~85ºC
TA= 25ºC
TA=
-10~85ºC
1.8
-
0.8×Vcc
0.8×Vcc
0.8×Vcc
-
-
-
-
-
-2
-
-2
-
-2
-
-2
-
Note 1: Typical value is 615mV. Minimum and Maximum value is percentage of typical value.
Note 2: Typical value is 585mV. Minimum and Maximum value is percentage of typical value.
Typ
-
1.5
-
-
-
-
-
-
-
-
-
100
-
100
-
100
-
100
Max
5.5
2.5
-
-
-
0.3
0.3
0.4
1
20
Unit
V
μA
V
V
μA
nA
+2 %
- ppm/ºC
+2 %
- ppm/ºC
+2 %
- ppm/ºC
+2 %
- ppm/ºC
12-07-0002
PT0212-6
07/05/12
2



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