ALSC ASM1817-10F/T Low power, 3.3v/3.0v up reset, active high, push-pull output Datasheet

ASM1817
February 2005
rev 1.5
Low Power, 3.3V/3.0V µP Reset, Active HIGH, Push-Pull Output
General Description
Applications
The ASM1817 voltage supervisory device with low-power, 3.3V/
•
Set-top boxes
3.0V µP Reset, active HIGH, Push-Pull output. Maximum
•
Cellular phones
supply current over temperature is a low 15µA (at 3.6V).
•
PDAs
•
Energy management systems
The ASM1817 generates an active HIGH reset signal whenever
•
Embedded control systems
the monitored supply is out of tolerance. A precision reference
•
Printers
and comparator circuit monitor power supply (VCC) level.
Tolerance level options are 5%, 10% and 20% percent. When
•
Single board computers
an out-of-tolerance condition is detected, an internal power-fail
Typical Operating Circuit
signal is generated which forces an active HIGH reset signal.
After VCC returns to an in-tolerance condition, the reset signal
VCC
remains active for 150ms to allow the power supply and system
microprocessor to stabilize.
ASM1817
The ASM1817 is designed with a push-pull output stage and
Microprocessor
operates over the extended industrial temperature range.
Devices are available in TO-92 and compact surface mount
RESET
SOT-23 packages.
Other low power products in this family include the ASM1810/
RESET
GND
11/12/15/16, ASM1233D and ASM1233M.
Key Features
•
Block Diagram
Low Supply Current
•20 µA maximum (5.5 V)
VCC
•15 µA maximum (3.6 V)
•
Automatically restarts a microprocessor after power failure
•
150ms reset delay after VCC returns to an in-tolerance condition
•
Active HIGH power-up reset
•
Precision temperature-compensated voltage reference and
•
Eliminates external components
•
TO-92 and compact surface mount SOT-23 package
•
Push-Pull output for minimum current drain
•
Operating temperature -40°C to +85°C
Supply
Tolerance
Bias
ASM1817
+
-
comparator
Delay
150ms
Typical
Reference
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
RESET
February 2005
ASM1817
rev 1.5
Pin Configuration
TO-92
SOT-23
RESET
ASM1817
1
ASM1817-R
VCC
3
GND
2
1
2
3
Pin Description
TO-92
SOT-23
Pin #
Pin #
1
Pin Name
Description
1
RESET
Active HIGH reset output
2
2
VCC
Power supply input
3
3
GND
Ground
Low Power, 3.3V/3.0V µP Reset
Notice: The information in this document is subject to change without notice
2 of 9
ASM1817
February 2005
rev 1.5
Application Information
tR
Operation - Power Monitor
The
ASM1817
detects
VCCTP (MAX)
out-of-tolerance
power
supply
conditions. It resets a processor during power-up, power-
VCCTP
VCCTP (MIN)
down and issues a reset to the system processor when the
monitored power supply voltage is below the reset threshold.
~
When an out-of-tolerance VCC voltage is detected, the
RESET signal is asserted. On power-up, RESET is kept
tRPU
VCC
active (HIGH) for approximatley 150ms after the power
supply voltage has reached the selected tolerance. This
~
~
allows the power supply and microprocessor to stablize
before RESET is released.
VOL
RESET
ASM1817
Figure 2: Timing Diagram: Power-Up
Microprocessor
RESET
RESET
VCC
Figure 1: Typical Application
tF
VCCTP (MAX)
VCCTP
VCCTP (MIN)
~~
tRPD
VOH
~~
RESET
RESET Slews with VCC
Figure 3: Timing Diagram: Power-Down
Low Power, 3.3V/3.0V µP Reset
Notice: The information in this document is subject to change without notice
3 of 9
February 2005
ASM1817
rev 1.5
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
2
200
KV
V
Soldering Temperature (for 10 sec)
Storage Temperature
-55
ESD rating
HBM
MM
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.
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
Min
Typ
Max
Unit
5.5
V
Supply voltage
VCC
Output Voltage
VOH
IOUT < 500 µA
Output Current
IOH
Output = 2.4V, VCC > 2.7V
Output Current
IOL
Output = 0.4V, VCC > 2.7V
Operating Current
ICC
VCC < 5.5V, RESET output open
8
20
µA
Operating Current
ICC
VCC < 3.6V, RESET output open
6
15
µA
1.2
VCC - 0.5V
VCC - 0.1V
V
350
µA
+10
mA
VCC Trip Point (ASM1817R-5)
VCCTP
2.98
3.06
3.15
V
VCC Trip Point (ASM1817R-10)
VCCTP
2.80
2.88
2.97
V
VCC Trip Point (ASM1817R-20)
VCCTP
2.47
2.55
2.64
V
Output Capacitance
COUT
10
pF
VCC Detect to RESET Low
tRPD
5
µs
VCC Slew Rate
(VCCTP (MAX) to VCCTP (MIN)
VCC Slew Rate
(VCCTP (MIN) to VCCTP (MAX)
VCC Detect to RESET High
2
tF
300
µs
tR
0
ns
tRPU
tr = 5µs
100
150
250
ms
Note: The tF value is for reference in defining values for tRPD and should not be considered for proper operation or use.
Low Power, 3.3V/3.0V µP Reset
Notice: The information in this document is subject to change without notice
4 of 9
February 2005
ASM1817
rev 1.5
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, 3.3V/3.0V µP Reset
Notice: The information in this document is subject to change without notice
5 of 9
ASM1817
February 2005
rev 1.5
Package Dimension
Plastic SOT-23 (3-Pin)
D
B
E
H
e
S
A
a
A1
C
e1
L
Inches
Millimeters
Min
Max
Min
Max
Plastic SOT-23 (3-Pin)
A
0.030
0.046
0.75
1.17
A1
0.002
0.006
0.05
0.15
B
0.012
0.020
0.30
0.50
C
0.003
0.008
0.08
0.20
D
0.110
0.120
2.80
3.04
E
0.047
0.055
1.20
1.40
e
0.037 BSC
0.95 BSC
e1
0.075 BSC
1.9 BSC
H
0.083
0.104
2.10
2.64
L
0.016
0.024
0.40
0.60
a
o
0
o
8
o
0
8
S
NA
o
NA
Low Power, 3.3V/3.0V µP Reset
Notice: The information in this document is subject to change without notice
6 of 9
February 2005
ASM1817
rev 1.5
To-92 (3-Pin)
Dimensions in Inches
Min
Max
Dimensions in Millimeters
Min
Max
TO-92
A
0.175
0.185
4.445
4.699
b
0.016
0.020
0.406
0.508
C
0.014
0.016
0.356
0.406
φD
0.175
0.185
4.445
4.699
E
0.138
0.144
3.505
3.658
e
0.098
0.102
2.489
2.591
e1
0.045
0.055
1.143
1.397
j
0.168
0.174
4.269
4.420
L
0.500
0.585
12.7
14.86
s
0.095
0.099
2.413
2.515
Low Power, 3.3V/3.0V µP Reset
Notice: The information in this document is subject to change without notice
7 of 9
February 2005
ASM1817
rev 1.5
Ordering Information
Device Summary
Part Number**
RESET
Output
Voltage (V)
RESET
Tolerance
(%)
RESET
Time (ms)
Push-Pull
Output Stage
SOT-23
Package
RESET
Polarity
Package
Marking
TIN - LEAD DEVICES
ASM1817R-5
3.06
5
150
‹
‹
HIGH
RPLL
ASM1817R-10
2.88
10
150
‹
‹
HIGH
RQLL
ASM1817R-20
2.55
20
150
‹
‹
HIGH
RRLL
ASM1817R-5F
3.06
5
150
‹
‹
HIGH
KPLL
ASM1817R-10F
2.88
10
150
‹
‹
HIGH
KQLL
ASM1817R-20F
2.55
20
150
‹
‹
HIGH
KRLL
Part Number**
RESET
Output
Voltage (V)
RESET
Tolerance
(%)
RESET
Time (ms)
Push-Pull
Output Stage
TO-92
Package
RESET
Polarity
Package
Marking
LEAD FREE DEVICES
TIN - LEAD DEVICES
ASM1817-5
3.06
5
150
‹
‹
HIGH
ASM1817-5
ASM1817-10
2.88
10
150
‹
‹
HIGH
ASM1817-10
ASM1817-20
2.55
20
150
‹
‹
HIGH
ASM1817-20
ASM1817-5F
3.06
5
150
‹
‹
HIGH
ASM1817-5F
ASM1817-10F
2.88
10
150
‹
‹
HIGH
ASM1817-10F
ASM1817-20F
2.55
20
150
‹
‹
HIGH
ASM1817-20F
LEAD FREE DEVICES
** Add /T to Part Number for Tape and Reel (i.e ASM18xx-x/T)
LL- Lot Code
Low Power, 3.3V/3.0V µP Reset
Notice: The information in this document is subject to change without notice
8 of 9
ASM1817
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: ASM1817
Document Version: 1.5
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