LRC LR8809 Ultra-small built-in delay high-precision voltage detector Datasheet

LRC
CE8809 Series
LESHAN RADIO COMPANY,LTD.
ULTRA-SMALL PACKAGE BUILT-IN DELAY HIGH-PRECISION VOLTAGE DETECTOR
ULTRA-SMALL BUILT-IN DELAY
HIGH-PRECISION VOLTAGE DETECTOR
„
Introduction
The LR8809 Series is a series of
high-precision voltage detectors with a
built-in delay time generator of fixed
time. developed using CMOS process.
The detection voltage is fixed internally,
with an accuracy of ±2.0 %. Internal
oscillator and counter timer can delay
the release signal without external
parts, delay times 200 mS Two output
forms, Nch pen-drain and CMOS
output are available.
„
Application
• Memory battery back-up circuits
• Power-on reset circuits
• Power failure detection
• Power monitor for portable equipment
such as notebook computers, digital
cameras, PDA, and cellular phones.
• Constant voltage power monitors
for cameras, video equipment and
communication devices.
• Power monitor for microcomputers and
reset for CPUs.
„
„
Features
• Ultra-low current consumption: 1.0μ[email protected](typ)
• High-precision detection voltage: ±2.0 %
• Hysteresis characteristics: -VDET ×5%(typ)
• Operating voltage range: 0.95 V to 8.0 V
• Detection voltage: 1.5V to 6.0 V (0.1 V step)
• Delay time: 200 mS(typ)
• Output forms:
NMOS open-drain output (Active Low)
CMOS output (Active Low)
„
Ordering Information
CE8809①②③④
LR8809
DESIGNATOR
①
②③
④
SYMBOL
DESCRIPTION
C
CMOS
N
Nch open drain
Integer
Output Voltage(1.5V~6.0V)
e.g. 3.0V= ②:3, ③:0
M/MA
Package:SOT23-3
N/NA
Package:SOT343(SC-82)
P
T/TA
E
Package:SOT89-3
Package:TO-92
Package:SOT23-6
Block Diagrams
Nch open-drain
CMOS output
Note:*1-parasitic diode
V0.3
LR8809 SERIES
1(7)
LRC
„
LESHAN RADIO COMPANY,LTD.
Pin Configurations
Table 1
LR8809 Series (SOT-23-3)
PIN NO.
M
MA
Functions
1
VDD
VDD
Voltage input pin
VOUT
-
-
VSS
GND pin
VSS
-
GND pin
-
VOUT
Table 2
LR8809 Series (SOT-89-3)
2
3
Voltage detection output pin
PIN NO
P
1
VOUT
Voltage detection output pin
2
VDD
Voltage input pin
3
VSS
GND pin
Functions
Table 3
PIN NO
1
2
3
PIN NO
1
2
3
4
LR8809 Series (TO-92)
T
TA
VOUT
-
-
VDD
Voltage input pin
VDD
-
Voltage input pin
-
VSS
GND pin
VSS
-
GND pin
-
VOUT
Table 4
V0.3
Voltage detection output pin
Voltage detection output pin
Voltage detection output pin
LR8809 Series (SOT343)
N
NA
VOUT
-
-
Functions
VDD
VDD
Functions
Voltage detection output pin
Voltage input pin
-
Voltage input pin
GND pin
VSS
NC
-
No Connection
VSS
-
GND pin
VOUT
-
2(7)
Voltage detection output pin
LRC
LESHAN RADIO COMPANY,LTD.
Table 5
„
LR8809 Series (SOT23-6)
PIN NO
E
1
NC
2
VSS
3
VOUT
4
VDD
5
NC
No Connection
6
NC
No Connection
Functions
No Connection
GND pin
Voltage detection output pin
Voltage input pin
Absolute Maximum Ratings
Item
Symbol
(Ta=25°C unless otherwise specified)
Absolute maximum ratings
Unit
Power supply voltage
VDD
VSS-0.3 ~ VSS+10
V
Output voltage
VOUT
VSS-0.3 ~ VSS+10
V
250
mW
500
mW
500
mW
250
mW
SOT-23-3
Power
SOT-89
dissipation
TO-92
PD
SOT343
Operating ambient temperature
Topr
-40 ~+85
°C
Storage temperature
Tstg
-40 ~+125
°C
„
Electrical Characteristics
(Ta=25°C unless otherwise specified)
Item
Detection
voltage*1
Hysteresis
width
Current
consumption
Operating
voltage
V0.3
Symbol
Condition
−VDET
—
VHYS
—
ISS
VDD
VDD =-VDET+0.5V
Min.
−VDET(S)
×0.98
0.02×
Typ.
−VDET(S)
0.05×
Max.
−VDET(S)
×1.02
0.08×
Unit
V
V
−VDET(S)
−VDET(S)
−VDET(S)
CE8809C/N20~26
—
1.0
2.0
uA
CE8809 C/N 26~39
—
1.2
2.5
uA
CE8809 C/N 39~60
—
1.5
3.0
uA
0.95
—
8
V
—
3(7)
LRC
Output
current
Leakage
current
NMOS:
CE8809 C/N 20~26
3.0
13.0
—
mA
VOUT =0.5 V
CE8809 C/N 26~39
3.0
15.0
—
mA
CE8809 C/N 39~60
3.0
18.0
—
mA
PMOS:
CE8809 C/N 20~26
1.5
4.0
—
mA
VDD-VOUT =0.5 V
CE8809 C/N 26~39
1.5
6.0
—
mA
VDD =-VDET+0.5 V
CE8809 C/N 39~60
1.5
8.0
—
mA
—
0.1
uA
±120
±360
VDD =-VDET-0.5 V
IOUT
ILEAK
temperature
Only for NMOS open-drain output products,
VDD =8.0 V, VOUT =8.0 V
Ta=−40°C ~ +85°C
coefficient
Delay time
LESHAN RADIO COMPANY,LTD.
—
TD
200
ppm/
°C
mS
*1. −VDET: Actual detection voltage value, −VDET(S): Specified detection voltage value
„
Functional Description
1. When a voltage higher than the release voltage (+VDET) is applied to the voltage input
pin (VDD), the voltage will gradually fall..When a voltage higher than the detect voltage
(-VDET) is applied to VDD , output (VOUT) will be equal to the input at VDD.
Note that high impedance exists at VOUT with the N-channel open drain configuration. If
the pin is pulled up, VOUT T will be equal to the pull up voltage.
2. When VDD falls below -VDET , VOUT will be equal to the ground voltage (VSS) level
(detect state).
Note that this also applies to N-channel open drain configurations.
3. When VDD falls to a level below that of the minimum operating voltage (VMIN ) output
will become unstable.
Because the output pin is generally pulled up with N-channel open drain configurations,
output will be equal to pull up voltage.
4. When VDD rises above the VSS level (excepting levels lower than minimum operating
voltage), VOUT will be equal to VSS until VDD reaches the +VDET level.
5 . Although VDD will rise to a level higher than +VDET, VOUT maintains ground voltage
level via the delay circuit.
6.
Following transient delay time, VDD will be output at VOUT.
Note that high impedance exists with the N-channel open drain configuration and that
voltage will be dependent on pull up.
Notes :
1. The difference between -VDET and +VDET represents the hysteresis range.
2. Propagation delay time (tD) represents the time it takes for VDD to appear at VOUT
once the said voltage has exceeded the +VDET level.
V0.3
4(7)
LRC
„
LESHAN RADIO COMPANY,LTD.
Standard Circuits
1、CMOS output:
LR8809
2、Nch open-drain
LR8809
LR8809
V0.3
5(7)
LRC
„
LESHAN RADIO COMPANY,LTD.
Package information
● SOT-23-3
● TO-92
V0.3
6(7)
LRC
LESHAN RADIO COMPANY,LTD.
● SOT-89
Symbols
● SOT343(SC-82)
V0.3
7(7)
Dimensions in millimeters
Min
Nom
Max
A
1.40
1.50
1.60
b
0.36
0.42
0.48
b1
0.41
0.47
0.53
b2
1.40
1.60
1.75
C
0.38
0.40
0.43
D
4.40
4.50
4.60
E
-
-
4.25
E1
2.40
2.50
2.60
θ
1.40
1.50
1.60
L
1.80
-
-
L1
-
0.40
-
Similar pages