TS823/824/825 Series

Microprocessor Supervisory Circuit

with Watchdog Timer & Manual Reset

2/8

Version: C07

Parameter

Conditions

Symbol

Min

Typ

Max

Unit

Input Supply Voltage

Vdd

1.0

--

5.5

V

Supply Current

WDI and MRB unconnected

Idd

--

3

10

uA

TS823/824/825CX5A

4.56

4.63

4.7

TS823/824/825CX5B

4.31

4.38

4.45

TS823/824/825CX5D

3.03

3.08

3.13

TS823/824/825CX5E

2.89

2.93

2.97

TS823/824/825CX5F

2.59

2.63

2.67

TS823/824/825CX5G

2.28

2.32

2.36

Reset Threshold

TS823/824/825CX5H

2.15

2.19

2.23

V

RESET Output Voltage Low

--

--

0.5

V

(RESET) Output Voltage High

0.8 Vdd

--

--

V

Vdd to Reset Delay

--

40

--

uS

Reset Active Timeout Period

Ta=-40

140

210

280

mS

Watchdog Timeout Period

1120

1760

2400

mS

WDI Pulse Width

50

--

--

nS

--

--

0.7

V

WDI Input Threshold

0.8 Vdd

--

--

V

-15

-8

0.7

uA

WDI Input Current

--

8

15

uA

--

--

0.7

V

MR Input Threshold

0.8 Vdd

--

--

V

MR Pulse Width

1

--

--

uS

MR Noise Immunity

Pulse width with no reset

--

100

--

nS

MR to Reset Delay

--

500

--

nS

MR Pull Up Resistance

80

--

120

KΩ

Input Supply Voltage

Ta=-40

1.0

--

5.5

V

Detail Description

Pin Function

Pin Name

Pin Description

Reset

Active Low

GND

Ground

(Reset)

Active High

MR

This pin is active low. Pulling this pin low to forces a reset. After a low to high transition reset remains

asserted for exactly one reset timeout period. This pin is internally pulled high. If this function is unused

then float this pin or tie it to Vdd.

WDI

Watch Dog Input. Any transition on this pin will reset the Watch Dog timer. If this pin remains high or

low for longer than the Watch Dog interval then a reset is asserted. Float or tri-state this pin to disable

the Watch Dog feature.

Vdd

Positive power supply. A reset is asserted after this voltage drops below a predetermined level. After

Vdd rises above that level reset remains asserted until the end of the reset timeout period.