MITSUMI

IC for System Reset PST90XX

IC for System Reset

Monolithic IC PST90XX Series

Outline

The function of this low voltage detection type IC is to accurately reset systems after detecting the supply

voltage at the time of switching power on and instantaneous power off in various CPU and other logic

systems. This IC, with its super low consumption current and high precision voltage detection capacity, is

most suited as a voltage check circuit for a number of products which use batteries.

Features

1. High precision voltage detection

2. Super low current consumption

3. Low operating threshold voltage

0.7V max.

4. Hysteresis voltage is provided as a detect voltage

Vs

5% typ.

5. The detect voltage can be selected at your discretion at 0.1 V step within the range of 0.8 to 1.8V by the

following stipulation method.

PST90XX

Detected voltage value

(Example : for 0.8V ······ PST9008)

Packages

TO-92A (PST90

)

SOT-25A (PST90

N)

Applications

1. Reset circuits for microcomputers, CPUs and MPUs

2. Reset circuits for logic circuits

3. Battery voltage check circuits

4. Back-up power supply switching circuits

5. Level detection circuits

Pin Assignment

12

3

TO-92A

54

12

3

SOT-25A

(TOP VIEW)

1

2

3

GND

Note : The pin 2 of SOT-25 package is a SUB terminal. Connect it to GND.

1

NC

2

SUB

3

GND

4

5

November 9, 2001