STLED325 datasheet(39/62 Pages) STMICROELECTRONICS

39 / 62 page

STLED325

Electrical ratings

Doc ID 17576 Rev 1

39/62

4.5

ESD performance

Figure 13.

Power down/up mode ac waveforms

Table 20.

ESD performance

Symbol

Parameter

Test conditions

Min

Typ

Max

Unit

ESD

MIL STD 883 method 3015

(all pins)

HBM

±2kV

Table 21.

Battery range and battery detect

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VBAT(1)

STMicroelectronics recommends the RAYOVAC BR1225 or BR1632 (or equivalent) as the battery supply.

Battery supply voltage

2.5

3.5(2)

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

IBAT

Battery supply current

TA=25C,

VCC= 0 V, Oscillator

ON, VBAT=3 V

710

Table 22.

Power down/up AC characteristics

Symbol

Parameter (1)(2)

VCC fall time should not exceed 5mV/µs.

Valid for ambient operating temperature: TA=-40 to 85, VCC = 2.5V to 5.5V (except where noted)

Min

Typ

Max

Unit

tpD

SCL and SDA at VIH before power down

trec

SCL and SDA at VIH after power-up

µs

Table 23.

Power down/up trip points DC characteristics

Symbol

Parameter(1)(2)

Min

Typ

Max

Unit

VSO

Battery back-up switchover voltage

(from VCC to VBAT)

VCC < 3.5V

and

VCC < VBAT

VSO

Battery back-up switchover voltage

(from VBAT to VCC)

VCC > VBAT

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