AMS AMS803L Precision supply-voltage monitor Datasheet

AMS803/09/10
Features
z
Description
Precision supply-voltage monitor
The AMS803/09/10
-
4.63V (AMS803/09/10L)
supervisory circuits used to monitor the power supplies
-
4.26V (AMS803/09/10M)
in µP and digital systems. They provide excellent circuit
-
3.08V (AMS803/09/10T)
reliability and low cost by eliminating external
-
2.93V (AMS803/09/10S)
components and adjustments when used with +3.3V,
-
2.63V (AMS803/09/10R)
+3.0V, or 2.5V powered circuits.
-
2.32V (AMS803/09/10Z)
z
140ms(min) reset pulse width
z
Push-Pull
These circuits perform a single function: they assert
a reset signal whenever the VCC supply voltage declines
/RESET
Output
Configurations
for
RESET
Output
Configurations
for
configuration
for
below a preset threshold, keeping it asserted for at least
AMS809
z
Push-Pull
140ms after VCC has risen above the reset threshold.
Reset thresholds suitable for operation with a variety of
AMS810
z
are microprocessor (µP)
Open-Drain
supply voltages are available.
/RESET
output
The AMS803 has
AMS803
while the AMS809/10
z
12µA Supply Current
z
Guaranteed Reset(/Reset) Valid to VCC = +1.0V
z
Power Supply Transient Immunity
z
No External Components
open-drain output stage,
have
push-pull outputs. The
AMS803’s open-drain /Reset output requires a pull-up
resistor that can be connected to a voltage higher than
VCC. The AMS803/09
have an active-low
/RESET
output while the AMS810 has an active-high RESET
Ordering Information
Part Number
an
output. The reset comparator is designed to ignore fast
Package
AMS803XTE
Lead free and Green SOT23-3
AMS809XTE
Lead free and Green SOT23-3
AMS810XTE
Lead free and Green SOT23-3
transients on VCC, and the outputs are guaranteed to be
in the correct logic state for VCC down to 1V.
Low supply current makes
Note: “x” refers to voltage range, see below table.
the
AMS803/09/10
ideal for use in portable equipment. The ICs are
available in 3 pin SOT23 packages.
Suffix: X—Monitored Voltage
X
L
Reset Threshold (V)
4.63
M
4.26
T
3.08
S
2.93
R
2.63
Block Diagram
VCC
Reset Logic
and Timer
+
-
VRST
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RESET
Z
2.32
AMS803/09/10
Pin Configuration
AMS803/09/10XT
1
GND
VCC 3
2
RESET
SOT23-3
Pin Description
Pin
Type
Description
VCC
-
Supply Voltage. Reset is asserted when VCC drops below the Reset Threshold Voltage (VRST). Reset
remains asserted until VCC rises above VRST and keep asserted for the duration of the Reset Timeout
Period (tRS) once VCC rises above VRST.
GND
-
Ground
RESET
O
Active-Low Reset Output (Push-Pull). It goes low when Vcc is below the reset threshold. It remains
low for about 200ms after Vcc rises above the reset threshold (VRST).
Functional Description
Reset Output
A microprocessor (µP) reset input starts the µP in a known state. Whenever the µP is in an unknown state, it should be held in
reset. The supervisory circuits assert reset during power-up and prevent code execution errors during power-down or brownout
conditions.
On power-up, once Vcc reaches about 1.0V, /RESET is a guaranteed logic low of 0.4V or less. As Vcc rises, /RESET stays low.
When Vcc rises above the reset threshold, an internal timer releases /RESET after about 200ms. /RESET pulses low whenever
Vcc drops below the reset threshold, i.e. brownout condition. If brownout occurs in the middle of a previously initiated reset pulse,
guaranteed to be 0.4V or less until Vcc drops below 1.0V. Reset Timing Diagram shows the timing relationship.
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AMS803/09/10
Typical Application Circuit
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AMS803/09/10
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 +6.0V
DC Input Voltage (All inputs except Vcc and GND)......-0.3V to VCC+0.3V
DC Output Current (All outputs) ..........................................................20mA
Power Dissipation .............................................................................. 320mW
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 conditions above those indicated in the operational sections of this specification is not implied. Exposure
to absolute maximum rating conditions for extended
periods may affect reliability.
Recommended Operation Conditions
Sym
VCC
TA
Description
Supply Voltage for 803/09/10(L/M)
Supply Voltage for 803/09/10(T/S)
Supply Voltage for 803/09/10(R/Z)
Test Conditions
-
Operating Temperature
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4
Min
4.5
3.0
2.7
Typ
5.0
3.3
3.0
-40
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-
Max
5.5
5.5
5.5
85
Unit
V
V
V
℃
AMS803/09/10
DC Electrical Characteristics
(VCC = VRN + 5% to 5.5V, TA= -40~85ºC, unless otherwise noted.)(Note 1)
Symbol
VCC
ICC
ICC
VRST
(VRTH-)
Description
Test Conditions
Operating Voltage Range
Supply Current
Supply Current
Threshold Voltage(Fallingedge)(Note 2)
1.0
-
10
10
5.5
30
30
V
V RN -1.1%
VRN
VRN +1.1%
VRN - 1.5%
VRN
V RN + 1.5%
TA= -40 ~ 85ºC
AMS809M
VRN - 1.8%
VRN
V RN + 2%
TA= -40 ~ 85ºC
All except
809M
VRN - 2.5%
VRN
VRN + 2.5%
AMS809M
4.232
VRTH
Reset Threshold Hysteresis
(Note 2)
Vcc varies between VRN ± 5%
(Only for 8xxL/M)
Output Low Voltage
Unit
AMS809M
All except
809M
TA= -40 ~ 85ºC
VOL
Max
TA= 25ºC
Threshold Voltage(Risingedge) (Note 2)
Output High Voltage
Typ
Vcc < 5.5V, AMS8xxL/M
Vcc < 3.6V, AMS8xxR/S/T/Z
VRTH+
VOH
Min
4.31
-
µA
V
4.396
50
-
mV
Vcc ≥ 4.5V Isource=800µA
Vcc-1.5
-
-
Vcc ≥ 2.7V Isource=500µA
0.8×Vcc
-
-
Vcc ≥ 1.8V Isource=150µA
0.8×Vcc
-
-
Vcc ≥ 1.0V Isource=4µA
0.8×Vcc
-
-
Vcc ≥ 4.5V Isink=3.2mA
-
-
0.4
Vcc ≥ 2.7V Isink=1.2mA
-
-
0.3
V
V
0.3
Vcc ≥ 1.0V Isink=100µA
Note: 1. Parameters of room temperature guaranteed by production test and parameters of full-temperature guaranteed by design.
2. VRST is Reset threshold voltage when VCC falls from high to low level. VRN is nominal reset threshold voltage.
AC Electrical Characteristics
Symbol
Description
Test Conditions
tRS
Reset Pulse Width
Min
Typ
Max
-
8xxT/S/R/Z
140
240
560
TA= 25ºC
8xxL/M
140
200
280
Reset Timing Diagram
VCC
VRST VRST + VRTH
tRS
RESET
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Unit
ms
AMS803/09/10
Mechanical Information
TE (Lead free and Green SOT23-3)
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
Note:
1) Controlling dimensions in millimeters.
2) Ref: JEDEC TO-236H
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AMS803/09/10
Marking Information
AA LJ
DATE CODE
YEAR & WORK WEEK
PART NO.
2 BIT CODE
(See Below Table)
Example: AAPJ
No.
1
2
3
4
5
6
Part No.
AMS809L
AMS809M
AMS809T
AMS809S
AMS809R
AMS809Z
PART NO.: AMS809LT
DATE CODE: YEAR 2005 WW10
Code
AA
AB
AC
AD
AE
AF
No.
7
8
9
10
11
12
AAPJ
Part No.
AMS803L
AMS803M
AMS803T
AMS803S
AMS803R
AMS803Z
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Lead-Free Sign
-: lead-free
PART NO.: AMS809LTE
DATE CODE: YEAR 2005 WW10
Lead –free package
Code
BC
BD
BE
BF
BG
BH
No.
13
14
15
16
17
18
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Part No.
AMS810L
AMS810M
AMS810T
AMS810S
AMS810R
AMS810Z
Code
AH
AI
AJ
AK
AL
AM
AMS803/09/10
Notes
Disclaimer:
•
AMS reserves the right to make changes to the information herein for the improvement of the design and performance
without further notice! Customers should obtain the latest relevant information before placing orders and should verify
that such information is complete and current.
•
All semiconductor products malfunction or fail with some probability under special conditions. When using AMS products
in system design or complete machine manufacturing, it is the responsibility of the buyer to comply with the safety
standards strictly and take essential measures to avoid situations in which a malfunction or failure of such AMS products
could cause loss of body injury or damage to property.
•
AMS will supply the best possible product for customers!
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