ASM690ACPA [ALSC]
UP Power Supply Supervisor With Battery Backup Switch; UP电源监控带备用电池开关
| 型号： | ASM690ACPA |
| 厂家： | 
ALLIANCE SEMICONDUCTOR CORPORATION |
| 描述： | UP Power Supply Supervisor With Battery Backup Switch |
| 文件： | 总13页 (文件大小：323K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ASM690A / 692A
ASM802L / 802M
ASM805L
October 2003
rev 1.0
µP Power Supply Supervisor With Battery Backup Switch
General Description
Applications
The AS690A / AS692A / AS802L / AS802M / AS805L offers
complete single chip solutions for power supply monitoring and
control battery functions in microprocessor systems. Each
device implements four functions: Reset control, watchdog
monitoring, battery-backup switching and power-failure
monitoring. In addition to microprocessor reset under power-up
and power-down conditions, these devices provide battery-
backup switching to maintain control in power loss and brown-
out situations. Additional monitoring capabilities can provide an
early warning of unregulated power supply loss before the
voltage regulator drops out. The important features of these
four functions are:
•
•
•
•
•
•
•
•
Embedded control systems
Portable/Battery operated systems
Intelligent instruments
Wireless instruments
Wireless communication systems
PDAs and hand-held equipments
µP / µC power supply monitoring
Safety system
Typical Operating Circuit
Unregulated DC
Regulated +5V
V
V
CC
CC
0.1 µF
R
1
RESET
PFO
RESET
NMI
•
•
1.6 second watchdog timer to keep microprocessor
responsive
PFI
V
BATT
WDI
I/O LINE
GND
R
2
4.40V or 4.65V VCC threshold for microprocessor reset at
power-up and power-down
+
V
3.6 V
GND
OUT
_
Lithium
Battery
•
•
SPDT (Single-pole, Double-throw) PMOS switch connects
backup power to RAM if VCC fails
ASM690A
1.25V threshold detector for power loss or general purpose
voltage monitoring
CMOS
V
RAM
CC
These features are pin-compatible with the industry standard
power-supply supervisors. Short-circuit and thermal protection
have also been added. The AS690A / AS802L / AS805L
generate a reset pulse when the supply voltage drops below
4.65V and the AS692A / AS802M generate a reset below
4.40V. The ASM802L / ASM802M have power-fail accuracy to
± 2%. The ASM805L is the same as the ASM690A except that
RESET is provided instead of RESET.
GND
Block Diagram
1
8
Battery-Switchover Circuit
V
V
OUT
BATT
2
V
CC
7
Reset
RESET
(RESET)
Generator
+
-
|+
Features
1.25V
Watchdog
Timer
•
Two precision supply-voltage monitor options
•4.65V (AS690A / AS802L / AS805L)
•4.40V (AS692A / AS802M )
3.5V
+
-
|+
6
4
-
WDI
PFI
•
•
•
•
•
•
•
Battery-backup power switch on-chip
Watchdog timer: 1.6 second timeout
Power failure / low battery detection
Short circuit protection and thermal limiting
Small 8-pin SO package
|+
+
1.25V
|+
0.8V
5
-
PFO
+
ASM690A, ASM692A, ASM802L, ASM802M, (ASM805L)
GND
3
No external components
Specified over full temperature range
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
ASM690A / 692A
ASM802L / 802M
ASM805L
October 2003
rev 1.0
Pin Configuration
Plastic/CerDip/SO
ASM690A
V
1
2
3
4
V
BATT
8
7
6
OUT
ASM692A
ASM802L
ASM802M
(ASM805L)
V
RESET (RESET)
WDI
CC
GND
PFI
5
PFO
Pin Description
Pin Number
ASM690A /
ASM692A
ASM802L /
ASM802M
Name
Function
ASM805L
Voltage supply for RAM. When VCC is above the reset threshold, VOUT connects to
CC through a P-Channel MOS device. If VCC falls below the reset threshold, this
V
VOUT
1
1
output will be connected to the backup supply at VBATT (or VCC, whichever is
higher) through the MOS switch to provide continuous power to the CMOS RAM.
VCC
2
3
2
3
+5V power supply input.
Ground
GND
Power failure monitor input. PFI is connected to the internal power fail comparator
which is referenced to 1.25V. The power fail output (PFO) is active LOW but
remains HIGH if PFI is above 1.25V. If this feature is unused, the PFI pin should be
4
5
6
4
5
6
PFI
PFO
WDI
connected to GND or VOUT
.
Power-fail output. PFO is active LOW whenever the PFI pin is less than 1.25V.
Watchdog input. The WDI input monitors microprocessor activity. An internal timer
is reset with each transition of the WDI input. If the WDI is held HIGH or LOW for
longer than the watchdog timeout period, typically 1.6 seconds, RESET (or RESET)
is asserted for the reset pulse width time, tRS, of 140ms, minimum.
Active-LOW reset output. When triggered by VCC falling below the reset threshold
or by watchdog timer timeout, RESET (or RESET) pulses low for the reset pulse
width tRS, typically 200ms. It will remain low if VCC is below the reset threshold
7
-
RESET
(4.65V in ASM690A / ASM802L and 4.4V in the ASM692A / ASM802L) and
remains low for 200ms after VCC rises above the reset threshold.
-
7
8
RESET
VBATT
Active-HIGH reset output. The inverse of RESET.
Auxiliary power or backup-battery input. VBATT should be connected to GND if the
function is not used. The input has about 40mV of hysteresis to prevent rapid tog-
8
gling between VCC and VBATT
.
2 of 13
µP Power Supply Supervisor With Battery Backup Switch
Notice: The information in this document is subject to change without notice
ASM690A / 692A
ASM802L / 802M
ASM805L
October 2003
rev 1.0
Detailed Description
Application Information
It is important to initialize a microprocessor to a known state
in response to specific events that could create code
execution errors and “lock-up”. The reset output of these
supervisory circuits send a reset pulse to the microprocessor
in response to power-up, power-down/power-loss or a
watchdog time-out.
Microprocessor Interface
The ASM690 has logic-LOW RESET output while the
ASM805 has an inverted logic-HIGH RESET output.
Microprocessors with bidirectional reset pins can pose a
problem when the supervisory circuit and the microprocessor
output pins attempt to go to opposite logic states. The
problem can be resolved by placing a 4.7kΩ resistor between
the RESET output and the microprocessor reset pin. This is
shown in Figure 2. Since the series resistor limits drive
capabilities, the reset signal to other devices should be
buffered.
RESET/RESET Timing
Power-up reset occurs when a rising VCC reaches the reset
threshold, VRT, forcing a reset condition in which the reset
output is asserted in the appropriate logic state for the
duration of tRS. The reset pulse width, tRS, is typically around
200ms and is LOW for the ASM690A, ASM692A, ASM802
and HIGH for the ASM805L. Figure 1 shows the reset pin
timing.
Power-loss or “brown-out” reset occurs when VCC dips below
the reset threshold resulting in a reset assertion for the
duration of tRS. The reset signal remains asserted as long as
VCC is between VRT and 1.1V, the lowest VCC for which these
devices can provide a guaranteed logic-low output. To ensure
logic inputs connected to the ASM690A / ASM692A/ASM802
RESET pin are in a known state when VCC is under 1.1V, a
100kΩ pull-down resistor at RESET is needed: the logic-high
ASM805L will need a pull-up resistor to VCC
.
Figure 1: RESET/RESET Timing
Watchdog Timer
A Watchdog time-out reset occurs when a logic “1” or logic
“0” is continuously applied to the WDI pin for more than 1.6
seconds. After the duration of the reset interval, the watchdog
BUF
Buffered
RESET
timer starts
a new 1.6 second timing interval; the
VCC
VCC
microprocessor must service the watchdog input by changing
states or by floating the WDI pin before this interval is
finished. If the WDI pin is held either HIGH or LOW, a reset
pulse will be triggered every 1.8 seconds (the 1.6 second
timing interval plus the reset pulse width tRS).
4.7K
Ω
Power Supply
RESET
RESET
ASM690A
GND
GND
Bi-directional I/O pin
Figure 2: Interfacing with bi-directional
microprocessor reset inputs
3 of 13
µP Power Supply Supervisor With Battery Backup Switch
Notice: The information in this document is subject to change without notice
ASM690A / 692A
ASM802L / 802M
ASM805L
October 2003
rev 1.0
Watchdog Input
As discussed in the Reset section, the Watchdog input is
used to monitor microprocessor activity. It can be used to
insure that the microprocessor is in a continually responsive
state by requiring that the WDI pin be toggled every second.
If the WDI pin is not toggled within the 1.6 second window
(minimum tWD + tRS), a reset pulse will be asserted to return
VBATT
VCC
D1
D2
SW2
SW1
SW3
SW4
the microprocessor to the initial start-up state. Pulses as
short as 50ns can be applied to the WDI pin. If this feature is
not used, the WDI pin should be open circuited or the logic
placed into a high-impedance state to allow the pin to float.
ASM690A
ASM805L
ASM692A
ASM802L
ASM802M
D3
VOUT
Backup-Battery Switchover
Figure 3: Internal device configuration of battery
switch-over function
A power loss can be made less severe if the system RAM
contents are preserved. This is achieved in the ASM690/692/
802/805 by switching from the failed VCC to an alternate
power source connected at VBATT when VCC is less than the
reset threshold voltage (VCC < VRT), and VCC is less than
VBATT. The VOUT pin is normally connected to VCC through a
2Ω PMOS switch but a brown-out or loss of VCC will cause a
switchover to VBATT by means of a 20Ω PMOS switch.
Although both conditions (VCC < VRT and VCC <VBATT) must
occur for the switchover to VBATT to occur, VOUT will be
switched back to VCC when VCC exceeds VRT irrespective of
the voltage at VBATT. It should be noted that an internal
device diode (D1 in Figure 3) will be forward biased if VBATT
exceeds VCC by more than a diode drop when VCC is
switched to VOUT. Because of this it is recommended that
Table 1. Pin Connections in Battery Backup Mode
Pin
Connection
Connected to VBATT through internal PMOS
switch
VOUT
VBATT
Connected to VOUT
PFI
Disabled
PFO
Logic-LOW
Logic-LOW (except on ASM805 where it is
HIGH)
VBATT be no greater than VRT +0.6V.
RESET
WDI
Watchdog timer disabled
Condition
SW1/SW2
SW3/SW4
During the backup power mode, the internal circuitry of the
supervisory circuit draws power from the battery supply.
While VCC is still alive, the comparator circuits remain alive
V
CC > Reset Threshold
CC < Reset Threshold
open
open
closed
V
closed
open
VCC > VBATT
and the current drawn by the device is typically 35µA. When
VCC drops more than 1.1V below VBATT, the internal
VCC < Reset Threshold
CC < VBATT
closed
switchover comparator, the PFI comparator and WDI
comparator will shut off, reducing the quiescent current drawn
by the IC to less than 1µA.
V
ASM690A/802A/805L Reset Threshold = 4.65V
ASM692A /ASM802M Reset Threshold = 4.4V
4 of 13
µP Power Supply Supervisor With Battery Backup Switch
Notice: The information in this document is subject to change without notice
ASM690A / 692A
ASM802L / 802M
ASM805L
October 2003
rev 1.0
Backup Power Sources - Batteries
diode-resistor pair clamps the capacitor voltage at one diode
drop below VCC. VCC itself should be regulated within ±5% of
Battery voltage selection is important to insure that the
battery does not discharge through the parasitic device diode
5V for the ASM692A/802M or within ±10% of 5V for the
ASM690A/802L/805L to insure that the storage capacitor
does not achieve an over voltage state.
D1 (see Figure 3) when VCC is less than VBATT and VCC
VRT
Table 2: Maximum Battery Voltages
>
.
Note: SuperCapTM is a trademark of Baknor Industries
Part Number
MAXIMUM Battery Voltage
+5V
ASM690A
ASM802L
ASM805L
ASM692A
ASM802M
4.80
4.80
4.80
4.55
4.55
VOUT
To SRAM
To µP
VCC
D1
VBATT
RESET
(RESET)
ASM692A
ASM802M
+
0.1F
Although most batteries that meet the requirements of Table
2 are acceptable, lithium batteries are very effective backup
source due to their high-energy density and very low self-
discharge rates.
GND
Figure 4: Capacitor as a backup power source
Battery replacement while Powered
Batteries can be replaced even when the device is in a
powered state as long as VCC remains above the reset
+5V
threshold voltage VRT. In the ASM devices, a floating VBATT
pin will not cause a powersupply switchover as can occur in
some other supervisory circuits. If VBATT is not used, the pin
VOUT
VCC
To SRAM
D1
should be grounded.
D2
To µP
VBATT
RESET
Backup Power Sources - SuperCap™
(RESET)
ASM692A
ASM802M
Capacitor storage, with very high values of capacitance, can
be used as a back-up power source instead of batteries.
+
100K
0.1F
SuperCap™ are capacitors with capacities in the fractional
farad range. A 0.1 farad SuperCap™ would provide a useful
backup power source. Like the battery supply, it is important
that the capacitor voltage remain below the maximum
voltages shown in Table 2. Although the circuit of Figure 4
shows the most simple way to connect the SuperCap™, this
circuit cannot insure that an over voltage condition will not
occur since the capacitor will ultimately charge up to VCC. To
GND
Figure 5: Capacitor as a backup power source
Voltage clamped to 0.5V below V
CC
insure that an over voltage condition does not occur, the
circuit of Figure 5 is preferred. In this circuit configuration, the
5 of 13
µP Power Supply Supervisor With Battery Backup Switch
Notice: The information in this document is subject to change without notice
ASM690A / 692A
ASM802L / 802M
ASM805L
October 2003
rev 1.0
Operation without a Backup Power Source
Power Fail Hysteresis
When operating without a back-up power source, the VBATT
A noise margin can be added to the simple monitoring circuit
of Figure 6 by adding positive feedback from the PFO pin.
The circuit of Figure 7 adds this positive “latching” effect by
means of an additional resistor R3 connected between PFO
and PFI which helps in pulling PFI in the direction of PFO and
eliminating an indecision at the trip point. Resistor R3 is
normally about 10 times higher in resistance than R2 to keep
the hysteresis band reasonable and should be larger than
10kΩ to avoid excessive loading on the PFO pin. The
calculations for the correct values of resistors to set the
hysteresis thresholds are given in Figure 7. A capacitor can
be added to offer additional noise rejection by low-pass
filtering.
pin should be connected to GND and VOUT should be
connected to VCC, since power source switchover will not
occur. Connecting VOUT to VCC eliminates the voltage drop
due to the ON-resistance of the PMOS switch.
Power-Fail Comparator
The Power Fail feature is an independent voltage monitoring
function that can be used for any number of monitoring
activities. The PFI function can provide an early sensing of
power supply failure by sensing the voltage of the
unregulated DC ahead of the regulated supply sensing seen
by the backup-battery switchover circuitry. The PFI pin is
compared to a 1.25V internal reference. If the voltage at the
PFI pin is less than this reference voltage, the PFO pin goes
low. By sensing the voltage of the raw DC power supply, the
microprocessor system can prepare for imminent power-loss,
especially if the battery backup supply is not enabled. The
input voltage at the PFI pin results from a simple resistor
voltage divider as shown in Figure 6.
V
IN
+5V
V
CC
R
1
ASM690A
ASM692A
ASM802L
ASM802M
ASM805L
PFI
R
2
R
C1*
3
VIN +5V
PFO
GND
ASM690A
ASM692A
V
CC
ASM802L
R1
R2
* Optional
ASM802M
To µP
ASM805L
PFO
PFI
+5V
PFO
0V
V
V
H
GND
V
L
0V
TRIP
1.25
V
-----------------------------------
VH
=
+5V
PFO
1.25
-------------------------
||
R2 R3
TRIP =
⎛
⎞
R
-----------------------------
⎛
⎜
⎝
⎞
⎟
⎠
2
+ R
⎝
⎠
||
A
-------------------
R1 + R2 R3
B
R
2
2
0V
5R
2
5R
2
VL – 1.25
---------------------- ------------------
-------------------
B =
> 1.25V
5 – 1.25
R3
1.25
---------
-------------------
R + R
A =
< 1.25V
+
=
1
2
R
+ R
R1
R2
1
2
Figure 6: Simple Voltage divider sets PFI trip point
Figure 7: Hysterisis Added To PFI Pin
6 of 13
µP Power Supply Supervisor With Battery Backup Switch
Notice: The information in this document is subject to change without notice
ASM690A / 692A
ASM802L / 802M
ASM805L
October 2003
rev 1.0
Monitoring Capabilities Of The Power-fail Input:
Although designed for power supply failure monitoring, the
PFI pin can be used for monitoring any voltage condition that
can be scaled by means of a resistive divider. An example is
the negative power supply monitor configured in Figure 8. In
this case a good negative supply will hold the PFI pin below
1.25V and the PFO pin will be at logic “0”. As the negative
voltage declines, the voltage at the PFI pin will rise until it
exceeds 1.25V and the PFO pin will go to logic “1”.
+5V
ASM690A
V
CC
ASM692A
ASM802L
ASM802M
ASM805L
R
1
PFO
PFI
R
2
GND
V-
V- = V
TRIP
+5V
PFO
0V
V
TRIP
V-
0V
1.25 – VTRIP
------------------------------
R2
5 – 1.25
------------------
=
R1
Figure 8: Using PFI To Monitor Negative Supply Voltage
7 of 13
µP Power Supply Supervisor With Battery Backup Switch
Notice: The information in this document is subject to change without notice
ASM690A / 692A
ASM802L / 802M
ASM805L
October 2003
rev 1.0
Absolute Maximum Ratings
Parameter
Min
Max
Unit
Pin Terminal Voltage with Respect to Ground
VCC
-0.3
-0.3
-0.3
6.0
6.0
V
V
VBATT
V
CC + 0.3
All other inputs *
Input Current at VCC
Input Current at VBATT
V
200
50
mA
mA
mA
Input Current at GND
Output Current
VOUT
20
Short circuit protected
All other inputs
20
mA
Rate of Rise: VBATT and VCC
100
V/µs
Continuous Power Dissipation
Plastic DIP (derate 9mW/°C above 70°C)
SO (derate 5.9mW/°C above 70°C)
CerDIP (derate 8mW/°C above 70°C)
Operating Temperature Range (C Devices)
Operating Temperature Range (E Devices)
Storage Temperature Range
800
500
650
70
mW
mW
mW
°C
0
-40
-65
85
°C
160
300
°C
Lead Temperature Soldering, (10 sec)
°C
* The input voltage limits on PFI and WDI may be exceeded if the current is limited to less than 10mA
Note: These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolonged time periods
may affect device reliability.
8 of 13
µP Power Supply Supervisor With Battery Backup Switch
Notice: The information in this document is subject to change without notice
ASM690A / 692A
ASM802L / 802M
ASM805L
October 2003
rev 1.0
Electrical Characteristics:
Unless other wise noted, VCC = 4.75V to 5.5V for the ASM690A / ASM802L / ASM805L and VCC = 4.5V to 5.5V for the ASM692A / ASM802M;
BATT = 2.8V; and TA = TMIN to TMAX
V
.
Parameter
Symbol
Conditions
ASM69_AC, ASM802_C
Min
Typ
Max
Unit
1.1
1.1
1.1
5.5
5.5
5.5
100
100
VCC, VBATT Voltage
Range (Note 1)
ASM805LC
V
ASM69_AE, ASM80__E
ASM69_AC, ASM80__E
ASM69_AC, ASM802_C
35
35
Supply Current
Excluding IOUT
IS
µA
I
SUPPLY in Battery
TA = 25°C
1.0
5.0
VCC = 0V, VBATT=2.8V
Backup Mode
(Excluding IOUT
TA = TMIN to TMAX
µA
µA
)
TA = 25°C
V
BATT Standby
-0.1
-1.0
0.02
0.02
5.5V>VCC>VBATT-0.2V
TA = TMIN to TMAX
Current (Note 2)
VCC
-
IOUT = 5mA
VCC-0.010
VCC-0.10
0.025
VOUT Output
V
IOUT = 50mA
VCC-0.25
V
OUT in Battery
I
OUT=250µA, VCC < VBATT-0.2V
VBATT-0.1 VBATT-0.001
V
Backup Mode
Battery Switch
Threshold,
Power Up
Power Down
20
-20
VCC < VRT
mV
mV
VCC to VBATT
Battery Switch over
Hysteresis
40
ASM690A/802L/805L
ASM692A, ASM802M
4.50
4.25
4.55
4.65
4.40
4.75
4.50
4.70
VRT
Reset Threshold
V
ASM802L, TA = 25°C, VCC falling
ASM802M, TA=25°C, VCC falling
4.30
4.45
Notes:
1. If VCC or VBATT is 0V, the other must be greater than 2.0V.
2. Battery charging-current is “-”. Battery discharge current is “+”.
3. WDI is guaranteed to be in an intermediate level state if WDI is floating and VCC is within the operating voltage range. WDI
input impedance is 50 kΩ. WDI is biased to 0.3VCC
.
9 of 13
µP Power Supply Supervisor With Battery Backup Switch
Notice: The information in this document is subject to change without notice
ASM690A / 692A
ASM802L / 802M
ASM805L
October 2003
rev 1.0
Parameter
Symbol
Conditions
Min
Typ
40
Max
Unit
mV
ms
Reset Threshold
Hysteresis
tRS
Reset Pulse Width
140
200
280
I
I
SOURCE = 800µA
SINK = 3.2mA
VCC - 1.5
0.4
0.3
ASM69_AC, ASM802_C, VCC=1.0V,
ISINK=50µA
ASM69_AE, ASM802_E, VCC=1.2V,
ISINK=100µA
Reset Output Volt-
age
0.3
V
ASM805LC, ISOURCE=4µA, VCC = 1.1V
ASM805LE, ISOURCE=4µA, VCC = 1.2V
ASM805L, ISOURCE=800µA
0.8
0.9
VCC - 1.5
ASM805L, ISINK=3.2mA
0.4
tWD
tWP
Watchdog Timeout
WDI Pulse Width
1.00
50
1.60
2.25
sec
ns
VIL = 0.4V, VIH = 0.8VCC
WDI = VCC
50
150
0.8
µA
µA
WDI Input Current
WDI = 0V
-150
1.20
-50
WDI Input Thresh-
old
(Note 3)
VCC = 5V, Logic LOW
V
ASM69_A,ASM805L, VCC = 5V
ASM802_C/E, VCC = 5V
1.25
1.250
0.01
1.30
1.275
25
PFI Input Thresh-
old
V
nA
V
1.225
-25
PFI Input Current
ISOURCE = 800µA
VCC - 1.5
PFO Output Volt-
age
I
SINK = 3.2mA
0.4
Notes:
1. If VCC or VBATT is 0V, the other must be greater than 2.0V.
2. Battery charging-current is “-”. Battery discharge current is “+”.
3. WDI is guaranteed to be in an intermediate level state if WDI is floating and VCC is within the operating voltage range. WDI
input impedance is 50 kΩ. WDI is biased to 0.3VCC
.
10 of 13
µP Power Supply Supervisor With Battery Backup Switch
Notice: The information in this document is subject to change without notice
ASM690A / 692A
ASM802L / 802M
ASM805L
October 2003
rev 1.0
Package Information
Plastic DIP (8-Pin)
Inches
Min
Millimeters
Max
Min
Max
Plastic DIP (8-Pin) *
A
A1
A2
b
-
0.210
-
-
5.33
-
0.015
0.115
0.014
0.045
0.030
0.355
0.005
0.300
0.240
0.100
0.300
-
0.38
2.92
0.36
1.14
0.80
0.80
0.13
7.62
6.10
0.195
0.022
0.070
0.045
0.400
-
4.95
0.56
1.78
1.14
1.14
-
b2
b3
D
D1
E
0.325
0.280
-
8.26
7.11
E1
e
CerDIP (8-Pin)
2.54
7.62
eA
eB
eC
L
-
0.430
0.060
0.150
CerDIP (8-Pin)
0.200
0.070
0.023
0.065
0.015
0.405
-
-
10.92
3.81
-
0.115
2.92
A
A1
b
-
-
5.08
1.78
0.58
1.65
0.38
10.29
-
0.015
0.014
0.038
0.008
-
0.38
0.36
0.97
0.20
-
B2
C
D
SO (8-Pin)
D1
E
0.005
0.290
0.220
0.100
0.125
0.13
7.37
5.59
2.54
3.18
0.320
0.310
8.13
7.87
E1
e
L
0.200
SO (8-Pin) **
0.069
5.08
A
A1
B
0.053
0.004
0.013
0.007
0.050
0.150
0.228
0.016
0.189
1.35
0.10
0.33
0.19
1.27
3.80
5.80
0.40
4.80
1.75
0.25
0.51
0.25
0.010
0.020
C
e
0.010
E
0.157
0.244
0.050
0.197
4.00
6.20
1.27
5.00
H
L
D
11 of 13
µP Power Supply Supervisor With Battery Backup Switch
Notice: The information in this document is subject to change without notice
ASM690A / 692A
ASM802L / 802M
ASM805L
October 2003
rev 1.0
Ordering Information
Part Number
ASM690A
Reset Threshold (V)
Temperature Range (°C)
Pins-Package
ASM690ACPA
ASM690ACSA
ASM690AC/D
ASM690AEPA
ASM690AESA
ASM690AMJA
ASM692A
4.5 TO 4.75
4.5 TO 4.75
4.5 TO 4.75
0 TO +70
0 TO +70
8-Plastic DIP
8-SO
25
DICE
-40 TO +85
-40 TO +85
Contact Factory
8-Plastic DIP
8-SO
4.5 TO 4.75
4.5 TO 4.75
8-Cer DIP
ASM692ACPA
ASM692ACSA
ASM692AC/D
ASM692AEPA
ASM692AESA
ASM692AMJA
ASM802L
4.25 TO 4.50
4.25 TO 4.50
4.25 TO 4.50
4.25 TO 4.50
4.25 TO 4.50
4.25 TO 4.50
0 TO +70
0 TO +70
8-Plastic DIP
8-SO
25
DICE
-40 TO +85
-40 TO +85
Contact Factory
8-Plastic DIP
8-SO
8-Cer DIP
ASM802LCPA
ASM802LCSA
ASM802LAEPA
ASM802LESA
ASM802M
4.5 TO 4.75
4.5 TO 4.75
4.5 TO 4.75
4.5 TO 4.75
0 TO +70
0 TO +70
8-Plastic DIP
8-SO
-40 TO +85
-40 TO +85
8-Plastic DIP
8-SO
ASM802MCPA
ASM802MCSA
ASM802MEPA
ASM802MESA
ASM805L
4.25 TO 4.50
4.25 TO 4.50
4.25 TO 4.50
4.25 TO 4.50
0 TO +70
0 TO +70
8-Plastic DIP
8-SO
-40 TO +85
-40 TO +85
8-Plastic DIP
8-SO
ASM805LCPA
ASM805LCSA
ASM805LC/D
ASM805LEPA
ASM805LESA
ASM805LMJA
4.5 TO 4.75
4.5 TO 4.75
4.5 TO 4.75
4.5 TO 4.75
4.5 TO 4.75
4.5 TO 4.75
0 TO +70
0 TO +70
8-Plastic DIP
8-SO
25
DICE
-40 TO +85
-40 TO +85
Contact Factory
8-Plastic DIP
8-SO
8-Cer DIP
12 of 13
µP Power Supply Supervisor With Battery Backup Switch
Notice: The information in this document is subject to change without notice
ASM690A / 692A
ASM802L / 802M
ASM805L
October 2003
rev 1.0
Copyright © Alliance Semiconductor
All Rights Reserved
Part Number: ASM690A / 692A
ASM802L / 802M
ASM805L
Document Version: 1.0
Alliance Semiconductor Corporation
2575, Augustine Drive,
Santa Clara, CA 95054
Tel: 408 - 855 - 4900
Fax: 408 - 855 - 4999
www.alsc.com
© Copyright 2003 Alliance Semiconductor Corporation. All rights reserved. Our three-point logo, our name and Intelliwatt are trademarks or
registered trademarks of Alliance. All other brand and product names may be the trademarks of their respective companies. Alliance reserves the
right to make changes to this document and its products at any time without notice. Alliance assumes no responsibility for any errors that may
appear in this document. The data contained herein represents Alliance's best data and/or estimates at the time of issuance. Alliance reserves the
right to change or correct this data at any time, without notice. If the product described herein is under development, significant changes to these
specifications are possible. The information in this product data sheet is intended to be general descriptive information for potential customers and
users, and is not intended to operate as, or provide, any guarantee or warrantee to any user or customer. Alliance does not assume any responsibility
or liability arising out of the application or use of any product described herein, and disclaims any express or implied warranties related to the sale
and/or use of Alliance products including liability or warranties related to fitness for a particular purpose, merchantability, or infringement of any
intellectual property rights, except as express agreed to in Alliance's Terms and Conditions of Sale (which are available from Alliance). All sales of
Alliance products are made exclusively according to Alliance's Terms and Conditions of Sale. The purchase of products from Alliance does not
convey a license under any patent rights, copyrights; mask works rights, trademarks, or any other intellectual property rights of Alliance or third
parties. Alliance does not authorize its products for use as critical components in life-supporting systems where a malfunction or failure may
reasonably be expected to result in significant injury to the user, and the inclusion of Alliance products in such life-supporting systems implies that
the manufacturer assumes all risk of such use and agrees to indemnify Alliance against all claims arising from such use.
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