Dual-Voltage µP Supervisory Circuits

with Sequenced Reset Outputs

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3

ELECTRICAL CHARACTERISTICS (continued)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

RESET1 Timeout Period

140

200

280

ms

2.2

3.1

4.0

RESET2 Timeout Period (Note 3)

140

200

280

ms

≥ 1.0V,

0.3

reset asserted

≥ 1.2V,

0.3

≥ 2.5V

0.3

RESET_ Output Voltage Low

≥ 4.25V

0.4

V

Open-Drain RESET Output

Leakage Current

reset not asserted

1.0

µA

reset not asserted

Push-Pull RESET1 Output

Voltage High (MAX6392 only)

asserted

V

0.8

2.4

MR Input

V

MR Minimum Pulse Width

50

µs

MR Glitch Rejection

100

ns

MR to RESET1 Delay

10

µs

MR to RESET2 Delay

100

ns

10

µs

MR Pullup Resistance

35

47

60

k

Ω

Reset Pullup Resistance

RESET1 to R1 or RESET2 to R2

35

47

60

k

Ω

Note 1: Overtemperature limits are guaranteed by design and not production tested. Devices tested at +25°C only.

adjustable RESET2 timeout period).