M40SZ100Y datasheet(18/25 Pages) STMICROELECTRONICS

18 / 25 page

DC and AC parameters

M40SZ100Y, M40SZ100W

18/25

VPFD

Power-fail deselect

voltage

4.20

4.4

4.50

2.55

2.60

2.70

VPFI

PFI input threshold

VCC = 5V(Y)

VCC = 3V(V)

1.225

1.2

1.275

1.225

1.25

1.275

PFI hysteresis

PFI rising

VSO

Battery back-up

switchover voltage

2.5

Valid for ambient operating temperature: TA = –40 to 85°C; VCC = 2.7 to 3.6V or 4.5 to 5.5V(except where noted).

Measured with VOUT and ECON open.

RSTIN internally pulled-up to VCC through 100kΩ resistor.

Outputs deselected.

External SRAM must match SUPERVISOR chip VCC specification (3V or 5V).

For rechargeable back-up, VBAT (max) may be considered VCC – 0.5V.

For PFO pin (CMOS).

Chip enable output (ECON) can only sustain CMOS leakage currents in the battery back-up mode. Higher leakage currents

will reduce battery life.

For RST & BL pins (open drain).

Table 7.

DC characteristics (continued)

Sym

Parameter

Test condition(1)

M40SZ100Y

M40SZ100W

Unit

Min

Typ

Max

Min

Typ

Max

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