AS1920_07 Datasheet, PDF (5/15 Pages) ams AG – Triple-Voltage, Micro-Power Microprocessor Supervisory Circuits

AS1920/AS1922
Datasheet - Electrical Characteristics
6 Electrical Characteristics
VCC18 = 1.8V, VCC3 = 3V, VCCA = VCC3, TAMB = -40 to +85ºC (unless otherwise specified).
Table 4. Electrical Characteristics
Symbol
Parameter
Conditions
Min Typ Max Unit
VRT18
Reset Threshold VCC18
1.653 1.683 1.713 V
VRT3
Reset Threshold VCC3
2.763 2.805 2.847 V
VRTA
Reset Threshold VCCA
0.982 1.00 1.018 V
lid ^{VCC3, VCC18}
Operating Voltage
RESETN in Correct Logic State
1
3.3 V
IVCC18
VCC18 Supply Current
VCC18 < VCC3, VCC18 = 1.8V
0.7
2 µA
a IVCC3
VCC3 Supply Current
VCC18 < VCC3, VCC3 = 3V
6.2 15 µA
v ^{IVCCA 1}
VCCA Input Current
VCCA = 1V
-15
0
15 nA
ill ^IOUT
Open-Drain RESETN
Output Current
Reset Not Asserted, Forced to 0V 2
4
13 µA
ILEAK
Open-Drain RESETN Output
Leakage Current
Reset Not Asserted, RESETN
Forced to 5.5V, TAMB = 25ºC
-0.1
0.1 µA
t _tRST
Reset Pulse Width
RESETN Low, TAMB = 25ºC ²
140 200 280 ms
G _{s VCC18, VCC3, or VCCA <}
A ^{t tUV}
VCC Undervoltage
Detect to RESETN
Reset Threshold by > 1% ²
TAMB = 25ºC
130
µs
s n ISINK = 2.5mA, VCC3 = 3V,
VCC18 = 0V
0.15 0.4
e _{ISINK = 100µA, VCC3 = 1V,}
m ^{t VOL}
Output Voltage Low, RESETN
VCC18 = 0V
ISINK = 100µA, VCC3 = 0V,
a ^{nVCC18 = 1V}
0.05 0.3
V
0.05 0.3
ISINK = 100µA, VCC3 = 1V,
oVCC18 = 1V
0.05 0.3
c ^VOH
Output Voltage High, RESETN
ISOURCE = 1µA (AS1922-xx)
VCC3 - VCC3 -
1 0.65
V
l _{1. Guaranteed by design.}
2. Measured from the time (t1) when the input passes through the input threshold voltage (VRTX) to the time (t2)
Technica ^{when RESETN passes through 1.5V.}
www.austriamicrosystems.com
Revision 1.00
4 - 14