AS1920-18-T austriamicrosystems, AS1920-18-T Datasheet - Page 6

• Manufacturer Part Number: AS1920-18-T
• Description: IC SUPERVISOR PUSH/PULL SOT23-5
• Manufacturer: austriamicrosystems
• Type: Multi-Voltage Supervisorr

Specifications of AS1920-18-T

• Number Of Voltages Monitored: 3
• Output: Push-Pull, Totem Pole
• Reset: Active Low
• Reset Timeout: 140 ms Minimum
• Voltage - Threshold: 1.683V, 2.805V, Adj
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AS1920/AS1922
Datasheet - D e t a i l e d D e s c r i p t i o n
8 Detailed Description
The AS1920/AS1922 microprocessor supervisory circuits were designed to generate a reset when at least one of the
three monitored supply voltages falls below its respective trip threshold.
These very-low-current (6.5µA, typ) devices maintain reset for a minimum timeout period after all supplies have stabi-
lized. Guaranteed to be in the correct state for V
low current requirements and strict monitoring requirements.
Figure 9. AS1920 Block Diagram
Figure 10. V
www.austriamicrosystems.com
V
V
V
GND
CC18
CCA
CC3
5
4
3
2
CC
Monitor Timing Diagram
Power
Detect
RESETN
Internal
V
V
CCX
CC
V
RTX
t
UV
CC
Reference
Bandgap
+
+
+
–
–
–
> +1.0V, these devices are perfect for multiple-voltage systems with
Revision 1.00
t
RST
200ms Pulse Generator
200ms
Delay
1.5V
AS1920
V
CC3
1
RESETN
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