ALSC ASM1233M-55/S Low power, 5v/3.0v, up reset, active low, open-drain output Datasheet

ASM1233M
October 2003
rev 1.0
Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output
General Description
Applications
The ASM1233M is a voltage supervisor with low-power, 5V µP
•
Set-top boxes
Reset, with an active LOW, open-drain output. Maximum supply
•
Cellular phones
current over temperature is a low 20µA.
•
PDAs
•
Energy management systems
The ASM1233M generates an active LOW reset signal
•
Embedded control systems
whenever the monitored supply is out of tolerance. A precision
•
Printers
reference and comparator circuit monitor power supply (VCC)
level. Tolerance level options are 5% ,and 10% for a 5V power
•
Single board computers
supply. The tolerance is 15% for the 3.3V, ASM1233M. When
an out-of-tolerance condition is detected, an internal power-fail
Typical Operating Circuit
signal is generated which forces an active LOW reset signal.
After VCC returns to an in-tolerance condition, the reset signal
VCC
remains active for 350ms to allow the power supply and system
microprocessor to stabilize.
ASM1233M
The ASM1233M is designed with a open-drain output stage and
Microprocessor
operates over the extended industrial temperature range.
Devices are available in compact surface mount SO-8
RESET
packages and 3-lead TO-92 packages.
Other low power products in this family include the ASM1810/
RESET
GND
11/12/15/16/17 and ASM1233D.
Key Features
•
Block Diagram
Low Supply Current
•20 µA maximum (5.5 V)
VCC
•15µA maximum (3.6 V)
•
Automatically restarts a microprocessor after power failure
•
350ms reset delay after VCC returns to an in-tolerance con-
•
Active LOW power-up reset, 5kΩ internal pull-up
•
Precision temperature-compensated voltage reference and
2
ASM1233M
dition
5.0kΩ
Supply
Tolerance
Bias
comparator
•
Eliminates external components
•
Low-cost TO-92 package
•
Compact surface mount SO-8 package
•
Operating temperature -40°C to +85°C
1
+
-
RESET
Delay
150ms
Typical
Reference
4
GND
Alliance Semiconductor
2575 Augustine Drive . Santa Clara, CA 95054 . Tel: 408.855.4900 . Fax: 408.855.4999 . www.alsc.com
Notice: The information in this document is subject to change without notice
ASM1233M
October 2003
rev 1.0
Pin Configuration
TO-92*
RESET
1
VCC
2
NC
3
GND
4
ASM1233M-X
SO-8
8
NC
7
NC
6
NC
5
NC
ASM1233M-X
1
2
3
Pin Description
Pin #
Pin Name
Description
SO-8
TO-92
1
1
RESET
2
2
VCC
Power supply input
3, 5, 6, 7 and 8
-
NC
No Connection.
4
3
GND
Active LOW reset output
Ground.
* See Ordering Information
Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
2 of 9
ASM1233M
October 2003
rev 1.0
tF
VCC
Application Information
VCCTP (MAX)
Operation - Power Monitor
VCCTP
The ASM1233M detects out-of-tolerance power supply
VCCTP (MIN)
conditions. It resets a processor during power-up, powerthe monitored power supply voltage is below the reset
threshold. When an out-of-tolerance VCC voltage is detected,
RESET
the RESET signal is asserted. On power-up, RESET is kept
tRPD
~
~
down and generates a reset to the system processor when
active (LOW) for approximatley 350ms after the power supply
voltage has reached the selected tolerance. This allows the
power supply and microprocessor to stablize before RESET
is released.
VOL
tR
Figure 2: Timing Diagram: Power-Down
VCCTP (MAX)
VCCTP (MIN)
~
VCC
VCCTP
tRPU
VOH
~
RESET
Figure 1: Timing Diagram: Power-Up
Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
3 of 9
ASM1233M
October 2003
rev 1.0
Absolute Maximum Ratings
Parameter
Min
Max
Unit
Voltage on VCC
-0.5
7
V
Voltage on RESET
-0.5
VCC + 0.5
V
Operating Temperature Range
-40
85
°C
260
°C
125
°C
Soldering Temperature (for 10 sec)
Storage Temperature
-55
NOTE: These are stress ratings only and functional use is not implied. Exposure to absolute maximum ratings for prolonged periods of time may affect device reliability.
Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
4 of 9
ASM1233M
October 2003
rev 1.0
Electrical Characteristics
Unless otherwise noted, VCC = 1.2V to 5.5V and specifications are over the operating temperature range of -40°C to +85°C.
All voltages are referenced to ground.
Parameter
Symbol
Conditions
Supply Voltage
VCC
Output Voltage
VOH
IOUT < 500 µA
Output Current
IOL
Output = 0.4V, VCC >= 2.7V
Operating Current
ICC
VCC < 5.5V, RESET output open
Operating Current
ICC
Min
Typ
1.2
VCC - 0.5V
Max
Unit
5.5
V
VCC - 0.1V
V
+8
VCC < =3.6V, RESET output
open
mA
8
20
µA
6
15
µA
VCC Trip Point (ASM1233M-5)
VCCTP
4.25
4.375
4.49
V
VCC Trip Point (ASM1233M-55)
VCCTP
4.5
4.625
4.75
V
VCC Trip Point (ASM1233M-3)
VCCTP
2.64
2.72
2.8
V
Voltage High Trip Level
ASM1233M-5
ASM1233M-55
VHTL
Voltage Low Trip Level
ASM1233M-5
ASM1233M-55
VLTL
4.00
V
Voltage High Trip Level
ASM1233M-3
VHTL
3.14
V
Internal Pull-up Resistor
RP
7.5
kΩ
10
pF
10
µs
Output Capacitance
COUT
VCC Detect to RESET Low
tRPD
VCC Slew Rate
(VHTL - VLTL )
VCC Slew Rate
(VLTL - VHTL)
VCC Detect to RESET High
4.75
3.5
5.0
2
V
tF
300
µs
tR
0
ns
tRPU
tr = 5µs
200
350
500
ms
Note: A 1kΩ resistor maybe required in some applications for proper operation of the microprocessor reset control circuit.
Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
5 of 9
ASM1233M
October 2003
rev 1.0
Family Selection Guide
Part #
RESET Voltage (V)
RESET Time
(ms)
Output Stage
RESET Polarity
ASM1810
4.620, 4.370, 4.120
150
Push-Pull
LOW
ASM1811
4.620, 4.350, 4.130
150
Open-Drain
LOW
ASM1812
4.620, 4.350, 4.130
150
Push-Pull
HIGH
ASM1815
3.060, 2.880, 2.550
150
Push-Pull
LOW
ASM1816
3.060, 2.880, 2.550
150
Open-Drain
LOW
ASM1817
3.060, 2.880, 2.550
150
Push-Pull
HIGH
ASM1233D
4.625, 4.375, 4.125
350
Open-Drain
LOW
ASM1233M
4.625, 4.375, 2.720
350
Open-Drain
LOW
Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
6 of 9
ASM1233M
October 2003
rev 1.0
Package Information
TO-92 (3-Pin)
Plastic SO-8 (8-Pin)
A
L
B
E
M
H
Section
A-A
D
D
J
C
Section
A-A
D
A1
A
F
0° - 8°
C
K
E
e
L
B
G
I Bottom View
H
Inches
Min
Millimeters
Max
Min
Max
Inches
Min
Plastic SO-8 (8-Pin)
A
0.053
0.069
1.35
1.75
A1
0.004
0.010
0.10
0.25
B
0.013
0.020
0.33
0.51
C
0.007
0.010
0.19
0.25
e
0.050
1.27
E
0.150
0.157
3.80
4.00
H
0.228
0.244
5.80
6.20
L
0.016
0.050
0.40
1.27
D
0.189
0.197
4.80
2.00
Millimeters
Max
Min
Max
Plastic SO-8 (8-Pin)
TO-92* (3-Pin)
A
0.175
0.195
4.45
4.95
B
0.170
0.192
4.32
4.96
C
0.500
0.610
12.70
15.49
D
0.016
0.022
0.406
0.559
E
0.095
0.105
2.41
2.67
F
0.045
0.60
1.14
1.52
G
0.45
0.060
1.14
1.52
H
0.085
0.095
2.16
2.41
I
0.130
0.155
3.30
3.94
J
0.014
0.020
0.35
0.51
K
0.093
0.115
2.36
2.92
L
45°
60°
45°
60°
M
0.118 Typical
Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
3.00
7 of 9
ASM1233M
October 2003
rev 1.0
Ordering Information
Device Summary
Part Number
RESET
Output
Voltage (V)
RESET
Tolerance
(%)
RESET
Time (ms)
Open-Drain
Output
Stage**
TO-92
Package*
ASM1233M-55
4.625
5
350
‹
‹
LOW
ASM1233M-5
4.375
10
350
‹
‹
LOW
ASM1233M-3
2.720
15
350
‹
‹
LOW
ASM1233MS-55
4.625
5
350
‹
‹
LOW
ASM1233MS-5
4.375
10
350
‹
‹
LOW
ASM1233MS-3
2.720
15
350
‹
‹
LOW
SO-8
Package
RESET
Polarity
* Add /S to Part Number for straight (unformed) leads. (i.e. ASM1233xx-x/S)
** Internal 5kΩ resistor pull-up
Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
8 of 9
ASM1233M
Alliance Semiconductor Corporation
2575, Augustine Drive,
Santa Clara, CA 95054
Tel: 408 - 855 - 4900
Fax: 408 - 855 - 4999
www.alsc.com
Copyright © Alliance Semiconductor
All Rights Reserved
Part Number: ASM1233M
Document Version: 1.0
© Copyright 2003 Alliance Semiconductor Corporation. All rights reserved. Our three-point logo, our name and Intelliwatt are trademarks or
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