TPS3823-Q1 Voltage Monitor With Watchdog Timer for Automotive | TI.com

TPS3823-Q1 (ACTIVE)

Voltage Monitor With Watchdog Timer for Automotive

 

Description

The TPS382x-xx-Q1 family of supervisors provide circuit initialization and timing supervision, primarily for DSP and processor-based systems. During power on, RESET asserts when the supply voltage VDD becomes greater than 1.1 V. Thereafter, the supply voltage supervisor monitors VDD and keeps RESET active low as long as VDD remains below the threshold voltage, VIT–. An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. The delay time, td, starts after VDD has risen above the threshold voltage VIT–. When the supply voltage drops below the threshold voltage VIT–, the output becomes active (low) again. No external components are required. All the devices of this family have a fixed-sense threshold voltage, VIT&ndash, set by an internal voltage divider. The TPS382x-xx-Q1 family also offers watchdog time out options of 200 ms (TPS3820-xx-Q1) and 1.6 s (TPS3823/4/8-xx-Q1).

Features

  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to 125°C
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C4B
  • ESD Protection Exceeds 2000 V Per MIL-STD-
    883, Method 3015; Using Human Body Model
    (C = 100 pF, R = 1500 Ω)
  • Power-On Reset Generator With Fixed Delay
    Time of 200 ms (TPS3823/4/5/8-xx-Q1) or 25 ms
    (TPS3820-xx-Q1)
  • Manual Reset Input (TPS3820/3/5/8-xx-Q1)
  • Reset Output Available in Active-Low
    (TPS3820/3/4/5-xx-Q1), Active-High (TPS3824/5-
    xx-Q1), and Open Drain (TPS3828-xx-Q1)
  • Supply Voltage Supervision Range:
    2.5 V, 3 V, 3.3 V, 5 V
  • Watchdog Timer (TPS3820/3/4/8-xx-Q1)
  • Supply Current of 15 µA (Typical)
  • 5-Pin SOT-23 Package
  • Temperature Range: –40°C to 125°C

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Parametrics Compare all products in Supervisor & reset ICs

 
Threshold Voltage 1 (Typ) (V)
Number of supplies monitored
VCC (Max) (V)
VCC (Min) (V)
Output driver type/reset output
Time Delay (ms)
Features
Rating
Operating temperature range (C)
Watchdog timer WDI (sec)
TPS3823-Q1 TPS3820-Q1 TPS3824-Q1 TPS3825-Q1 TPS3828-Q1
2.25
2.63
2.93
4.55    
2.93
4.55    
2.25
2.63
2.93
4.55    
2.93
4.55    
2.93
4.55    
1     1     1     1     1    
5.5     5.5     5.5     5.5     5.5    
1.1     1.1     1.1     1.1     1.1    
Active-low
Push-pull    
Active-low
Push-pull    
Active-high
Active-low
Push-pull    
Active-high
Active-low
Push-pull    
Active-low
Open-drain    
200     25     200     200     200    
Active-low enable
Manual reset
Watchdog timer    
Active-low enable
Manual reset
Watchdog timer    
Watchdog timer
Dual output    
Active-low enable
Manual reset
Dual output    
Active-low enable
Manual reset
Watchdog timer    
Automotive     Automotive     Automotive     Automotive     Automotive    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
1.6     0.2     1.6     1.6     1.6