AAT3532
MicroPower™ Microprocessor Reset Circuit
DC Electrical Characteristics
V
IN
= 4.5V to 5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are T
A
= 25°C.
Symbol
V
CC
I
Q
V
CCTP
I
IL
I
OH
I
OL
V
IH
V
IL
I
RST
Description
Supply Voltage
Quiescent Current
1
Reset Threshold 5%
Reset Threshold 10%
Input Leakage ST, TOL
Output Current RST
2
Current RST
2
, RST
ST and PBRST Input High
ST and PBRST Input Low
RST Output Leakage
Conditions
CMOS Levels
TTL Levels
Min
4.5
Typ
5.0
23
160
4.62
4.37
Max
5.5
50
500
4.74
4.49
1.0
Units
V
µA
V
µA
mA
mA
V
V
µA
V
CC
= 5.5V
TOL = GND
TOL = V
CC
V
OH
= 2.4V
V
OL
= 0.4V
4.50
4.25
-1.0
-8.0
10.0
2.0
-0.3
V
OH
= V
CC
V
CC
+ 0.3
0.8
1.0
AC Electrical Characteristics
V
IN
= 4.5V to 5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are T
A
= 25°C.
Symbol
C
IN
C
OUT
t
PB
t
PBD
t
RST
t
ST
t
TD
t
f
t
r
t
RPD
t
RPU
Description
Input Capacitance ST, TOL
3
Output Capacitance RST, RST
3
PBRST
4
PBRST Delay
Reset Active Time
ST Pulse Width
ST Time-out Period
V
CC
V
CC
V
CC
V
CC
Fall Time
3
Rise Time
3
Detect to RST High and RST Low
Detect to RST Low and RST Open
Conditions
T
A
= 25ºC
T
A
= 25ºC
See Figure 2
See Figure 2
See Figure 3
TD Pin = 0V
TD Pin = Open
TD Pin = V
CC
4.75V to 4.25V
4.25V to 4.75V
V
CC
Falling
V
CC
Rising
Min
Typ
Max
5
7
Units
pF
pF
ms
ms
ms
ns
ms
µs
µs
µs
ms
20
1
250
20
62.5
250
500
10
0
250
4
610
150
600
1200
5
610
20
1000
250
1000
2000
50
1000
1.
2.
3.
4.
Measured with outputs open and ST toggling at 100kHz, 50% duty cycle.
RST is an open drain output.
Guaranteed by design and not subject to production testing.
PBRST must remain low for greater than 20ms to guarantee a reset.
3532.2005.12.1.2
4
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
