M48T08 datasheet(21/31 Pages) STMICROELECTRONICS

21 / 31 page

M48T08, M48T08Y, M48T18

DC and AC parameters

Doc ID 2411 Rev 11

21/31

Table 9.

DC characteristics

Figure 12.

Power down/up mode AC waveforms

Note:

Inputs may or may not be recognized at this time. Caution should be taken to keep E1 high

or E2 low as VCC rises past VPFD (min). Some systems may perform inadvertent WRITE

cycles after VCC rises above VPFD (min) but before normal system operations begin. Even

though a power on reset is being applied to the processor, a reset condition may not occur

until after the system clock is running.

Symbol

Parameter

Test condition(1)

Valid for ambient operating temperature: TA = 0 to 70 °C; VCC = 4.75 to 5.5 V or 4.5 to 5.5 V (except where noted).

M48T08/M48T18/T08Y

Unit

Min

Max

ILI

Input leakage current

≤ VIN ≤ VCC

±1

µA

ILO

(2)

Outputs deselected.

Output leakage current

≤ VOUT ≤ VCC

±1

µA

ICC

Supply current

Outputs open

ICC1

(3)

Measured with control bits set as follows: R = '1'; W, ST, FT = '0.'

Supply current (standby) TTL

E1 = VIH, E2 = VIL

3mA

ICC2

(3)

Supply current (standby) CMOS

E1 = VCC – 0.2V,

E2 = VSS + 0.2V

3mA

VIL

Input low voltage

–0.3

0.8

VIH

Input high voltage

2.2

VCC + 0.3

VOL

Output low voltage

IOL = 2.1 mA

0.4

Output low voltage (INT)(4)

The INT pin is open drain.

IOL = 0.5 mA

0.4

VOH

Output high voltage

IOH = –1 mA

2.4

AI00566

VCC

INPUTS

INT

(PER CONTROL INPUT)

OUTPUTS

DON'T CARE

HIGH-Z

tFB

tPFX

tPFH

trec

tPD

tRB

tDR

VALID

NOTE

(PER CONTROL INPUT)

RECOGNIZED

VPFD (max)

VPFD (min)

VSO

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