TPS3898 (ACTIVE)

Single-Channel Ultra-Small Adjustable Supervisory Circuit With Active-Low Open-Drain Output

 

Recommended alternative parts

  • TPS3890  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.   TPS3890 has fixed threshold options and lower quiescent current.

Description

The TPS3895, TPS3896, TPS3897, and TPS3898 devices (TPS389x) are a family of very small supervisory circuits that monitor voltages greater than 500 mV with a 0.25% (typical) threshold accuracy and offer adjustable delay time using external capacitors. The TPS389x family also has a logic enable pin (ENABLE or ENABLE) to power on and off the output. With the TPS3895, for example, when the input voltage pin (SENSE) rises above the threshold, and the ENABLE pin is high, then the output pin (SENSE_OUT) goes high after the capacitor-adjustable delay time. When SENSE falls below the threshold or ENABLE is low, then SENSE_OUT goes low.

For TPS389xA versions, both SENSE and ENABLE have a capacitor-adjustable delay. The output asserts after this capacitor-adjustable delay when both SENSE and ENABLE inputs are good. The TPS389xP devices have a small, 0.2-µs propagation delay from when the enable pin asserts to when the output pin asserts, provided SENSE is above the threshold.

All devices operate from 1.7 V to 6.5 V and have a typical quiescent current of 6 µA with an open-drain output rated at 18 V. The TPS389x is available in an ultra-small USON package and is fully specified over the temperature range of TJ = –40°C to 125°C.

Features

  • Very Small USON (1.45 mm × 1.00 mm) Package
  • Adjustable Threshold Down to 500 mV
  • Threshold Accuracy: 1% Over Temperature
  • Capacitor-Adjustable Delay Time
  • Low Quiescent Current: 6 µA (Typical)
  • External Enable Input
  • Open-Drain (Rated at 18 V) and Push-Pull Output
    Options
  • Temperature Range: –40°C to 125°C
  • Pin-for-Pin Compatible With MAX6895/6/7/8

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Parametrics Compare all products in Supervisor and Reset IC

 
Threshold Voltage 1 (Typ) (V)
# 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)
TPS3898 TPS3808 TPS3890 TPS3895 TPS3896 TPS3897
Adjustable    Adjustable
0.84
1.12
1.16
1.4
1.67
1.77
2.33
2.79
3.07
4.65   
Adjustable
1.15
1.44
1.73
2.4
2.89
3.17   
Adjustable    Adjustable    Adjustable   
1    1    1    1    1    1   
6.5    6.5    5.5    6.5    6.5    6.5   
1.7    1.8    1.5    1.7    1.7    1.7   
Active-low
Open-drain   
Active-low
Open-drain   
Active-low
Open-drain   
Active-high
Push-pull   
Active-low
Push-pull   
Active-high
Open-drain   
Programmable    Programmable    Programmable    Programmable    Programmable    Programmable   
Active Low Enable
Manual Reset   
Active Low Enable
Manual Reset   
Active Low Enable
Manual Reset   
Active High Enable
Manual Reset   
Active Low Enable
Manual Reset   
Active High Enable
Manual Reset   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
-40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125   
None    None    None    None    None    None