Switchover voltage

AN3060

10/23

Doc ID 16253 Rev 2

fixed reference is well-suited for 3.3 V and 3.0 V applications, and is a drop-in replacement

for the older M41T81 (non-S).

Complex switchover thresholds

as possible before switching over to the backup supply thus extending the backup life

slightly.

Figure 6.

Switchover circuit

Table 1.

Summary of deselect and switchover thresholds

Root part

number

Switchover and deselect parameters

M41T00

M41T00AUD

2.8

M41T00S

2.6 V

M41T11

M41T56

3.5 V

M41T81

M41T81S

2.6 V

M41T82

(1)

1.

VRST

(1)

M41T83

VRST

(1)

VRST

(1)

M41ST85W

2.6 V

2.5 V

M41ST87W

2.62 V, THS = 0

2.88 V, THS = 1

2.5 V

M41T93

VRST

(1)

VRST

(1)

M41T94

2.6 V

2.5 V

VCC

VSO

VBAT

VCC-INT

AM04724v1