m48t18 STMicroelectronics, m48t18 Datasheet - Page 21

• Manufacturer Part Number: m48t18
• Description: 5v, 64kbit 8 Kb X 8 Timekeeper Sram
• Manufacturer: STMicroelectronics

Table 9.
1. Valid for Ambient Operating Temperature: T
2. Outputs deselected.
3. Measured with Control Bits set as follows: R = '1'; W, ST, FT = '0.'
4. The INT pin is open drain.
Figure 12. Power down/up mode AC waveforms
Note:
Symbol
I
I
I
CC1
CC2
V
LO
V
V
I
V
I
CC
OH
LI
OL
IH
IL
(2)
(3)
(3)
V CC
V PFD (max)
V PFD (min)
V SO
INT
INPUTS
OUTPUTS
Input Leakage Current
Output Leakage Current
Supply Current
Supply Current (Standby) TTL
Supply Current (Standby) CMOS
Input Low Voltage
Input High Voltage
Output Low Voltage
Output Low Voltage (INT)
Output High Voltage
DC characteristics
Inputs may or may not be recognized at this time. Caution should be taken to keep E1 high
or E2 low as V
cycles after V
though a power on reset is being applied to the processor, a reset condition may not occur
until after the system clock is running.
tPD
(PER CONTROL INPUT)
Parameter
VALID
CC
RECOGNIZED
CC
tF
rises above V
rises past V
(4)(4)
tPFX
A
= 0 to 70°C; V
tFB
PFD
PFD
(min). Some systems may perform inadvertent WRITE
(min) but before normal system operations begin. Even
E1 = V
Test condition
0V
E1 = V
E2 = V
0V
Outputs open
CC
I
I
I
OL
OL
OH
= 4.75 to 5.5V or 4.5 to 5.5V (except where noted).
V
= 2.1mA
= 0.5mA
V
IH,
tDR
= –1mA
OUT
CC
SS
IN
E2 = V
– 0.2V,
+ 0.2V
V
DON'T CARE
HIGH-Z
V
CC
CC
(1)
IL
tRB
M48T08/M48T18/T08Y
–0.3
Min
2.2
2.4
NOTE
tR
(PER CONTROL INPUT)
V
CC
tPFH
Max
0.8
0.4
0.4
±1
±1
80
3
3
trec
RECOGNIZED
+ 0.3
VALID
AI00566
Unit
mA
mA
mA
µA
µA
V
V
V
V
V
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