AAT3532 Datasheet, PDF (4/8 Pages) Advanced Analogic Technologies – MicroPower™ Microprocessor Reset Circuit

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
Conditions
Quiescent Current¹
Reset Threshold 5%
Reset Threshold 10%
Input Leakage ST, TOL
Output Current RST²
Current RST², RST
ST and PBRST Input High
ST and PBRST Input Low
RST Output Leakage
V_CC = 5.5V
TOL = GND
TOL = V_CC
V_OH = 2.4V
V_OL = 0.4V
V_OH = V_CC
CMOS Levels
TTL Levels
Min Typ Max Units
4.5
5.0
5.5
V
23
50
160
500
µA
4.50 4.62
4.74
V
4.25 4.37
4.49
-1.0
1.0
µA
-8.0
mA
10.0
mA
2.0
V_CC + 0.3 V
-0.3
0.8
V
1.0
µA
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, TOL³
Output Capacitance RST, RST³
PBRST⁴
PBRST Delay
Reset Active Time
ST Pulse Width
ST Time-out Period
V_CC Fall Time³
V_CC Rise Time³
V_CC Detect to RST High and RST Low
V_CC Detect to RST Low and RST Open
Conditions
Min Typ Max Units
T_A = 25ºC
T_A = 25ºC
See Figure 2
20
5
pF
7
pF
ms
See Figure 2
1
4
20
ms
250
610 1000 ms
See Figure 3
20
ns
TD Pin = 0V
62.5
150
250
TD Pin = Open 250
600 1000 ms
TD Pin = V_CC
500 1200 2000
4.75V to 4.25V
10
µs
4.25V to 4.75V
0
5
µs
V_CC Falling
V_CC Rising
50
µs
250
610 1000 ms
1. Measured with outputs open and ST toggling at 100kHz, 50% duty cycle.
2. RST is an open drain output.
3. Guaranteed by design and not subject to production testing.
4. PBRST must remain low for greater than 20ms to guarantee a reset.
4
3532.2005.12.1.2