M48Z02, M48Z12

6/16

Table 5. DC Characteristics

2. Outputs deselected.

3. Negative spikes of –1V allowed for up to 10ns once per Cycle.

OPERATION MODES

The M48Z02/12 also has its own Power-fail Detect

circuit. The control circuitry constantly monitors

the single 5V supply for an out of tolerance condi-

protects the SRAM, providing a high degree of

data security in the midst of unpredictable system

low approximately 3V, the control circuitry con-

nects the battery which maintains data operation

until valid power returns.

Table 6. Operating Modes

1. See Table 10, page 11 for details.

Symbol

Parameter

Min

Max

Unit

Input Leakage Current

0V

±1

µA

(2)

Output Leakage Current

0V

±1

µA

Supply Current

Outputs open

80

mA

Supply Current (Standby) TTL

3mA

Supply Current (Standby) CMOS

E

3mA

(3)

Input Low Voltage

–0.3

0.8

V

Input High Voltage

2.2

V

Output Low Voltage

0.4

V

Output High Voltage

2.4

V

Mode

E

G

W

DQ0-DQ7

Power

Deselect

4.75 to 5.5V

or

4.5 to 5.5V

X

X

High Z

Standby

WRITE

X

Active

READ

Active

READ

High Z

Active

Deselect

(1)

X

X

X

High Z

CMOS Standby

Deselect

X

X

X

High Z

Battery Back-up Mode