X4643, X4645

FN8123 Rev 0.00

Page 18 of 21

March 29, 2005

RESET Output Timing

VTRIP Programming Timing Diagram (WEL = 1)

VTRIP Programming Parameters

Symbol

Parameter

Min.

Typ.

Max.

Unit

tWDO

Watchdog Time Out Period,

WD1 = 1, WD0 = 1 (factory setting)

WD1 = 1, WD0 = 0

WD1 = 0, WD0 = 1

WD1 = 0, WD0 = 0

100

450

1

OFF

250

650

1.5

300

850

2

ms

ms

sec

tRST

Reset Time Out

100

250

400

ms

Parameter

Description

Min.

Max. Unit

tVPS

VTRIP Program Enable Voltage Setup time

1

µs

tVPH

VTRIP Program Enable Voltage Hold time

1

µs

tTSU

VTRIP Setup time

1

µs

tTHD

VTRIP Hold (stable) time

10

ms

tWC

VTRIP Write Cycle Time

10

ms

tVPO

VTRIP Program Enable Voltage Off time (Between successive adjustments)

0

µs

tRP

VTRIP Program Recovery Period (Between successive adjustments)

10

ms

VP

Programming Voltage

15

18

V

VTRAN

VTRIP Programmed Voltage Range

2.55

4.75

V

Vta1

Initial VTRIP Program Voltage accuracy (VCC applied-VTRIP) (Programmed at 25°C.)

-0.1

+0.4

V

Vta2

Subsequent VTRIP Program Voltage accuracy [(VCC applied-Vta1)-VTRIP.

Programmed at 25°C.]

-25

+25

mV

Vtr

VTRIP Program Voltage repeatability (Successive program operations. Programmed at

25°C.)

-25

+25

mV

Vtv

VTRIP Program variation after programming (0-75°C). (Programmed at 25°C.)

-25

+25

mV

VTRIP programming parameters are periodically sampled and are not 100% tested.

VCC

(VTRIP)

WP

tTSU

tTHD

tVPH

tVPS

VP

VTRIP

tVPO

SCL

SDA

A0h

01h or 03h

tRP

00h

00h