M48T58-70PC1 datasheet(5/17 Pages) STMICROELECTRONICS

Part #	M48T58-70PC1

Description	64 Kbit 8Kb x8 TIMEKEEPER SRAM

PDF	17 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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5 / 17 page

Symbol

Parameter

Min

Max

Unit

tPD

E1 or W at VIH or E2 at VIL before Power Down

µs

(1)

VPFD (max) to VPFD (min) VCC Fall Time

300

µs

tFB

(2)

VPFD (min) to VSO VCC Fall Time

µs

VPFD(min) to VPFD (max) VCC Rise Time

µs

tRB

VSO to VPFD (min) VCC Rise Time

µs

tREC

VPFD(max) to Inputs Recognized

200

Notes:1. VPFD (max) to VPFD (min) fall time of less than tF may result in deselection/write protection not occurring until 200

µs after

VCC passes VPFD (min).

2. VPFD (min) to VSO fall time of less than tFB may cause corruption of RAM data.

Table 8. Power Down/Up Mode AC Characteristics

(TA = 0 to 70

°C)

AI01168C

VCC

INPUTS

(PER CONTROL INPUT)

OUTPUTS

DON'T CARE

HIGH-Z

tFB

tPD

tRB

tDR

VALID

(PER CONTROL INPUT)

RECOGNIZED

VPFD (max)

VPFD (min)

VSO

tREC

Figure 5. Power Down/Up Mode AC Waveforms

5/17

M48T58, M48T58Y

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