fm3808 Ramtron Corporation, fm3808 Datasheet - Page 19

• Manufacturer Part Number: fm3808
• Description: 256kb Bytewide Fram W/ Real-time Clock
• Manufacturer: Ramtron Corporation

Electrical Specifications
Absolute Maximum Ratings
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This
is a stress rating only, and the functional operation of the device at these or any other conditions above those
listed in the operational section of this specification is not implied. Exposure to absolute maximum ratings
conditions for extended periods may affect device reliability.
DC Operating Conditions (T
Notes
1.
2.
3.
4.
5.
6.
7.
8.
9.
Rev. 1.3 (EOL)
Feb. 2006
V
I
I
I
V
I
V
V
V
V
I
I
V
V
V
V
V
Symbol
DD
SB1
SB2
BAK
LI
LO
DD
BAK
TP
LO
SW
RST
IH
IL
OH
OL
OLB
V
V
V
V
V
rather than from V
INT pin conditions are I
V
Memory and register access is blocked when V
V
DD
DD
DD
BAK
SW
IN
DD
Symbol
, V
=0, V
T
= 5.5V, /CE cycling at minimum cycle time. All inputs at CMOS levels, all outputs unloaded.
= 5.5V, /CE at V
= 5.5V, /CE at V
occurs when V
T
V
V
= 3.0V, V
LEAD
OUT
STG
DD
IN
Power Supply Voltage
V
Standby Current – TTL
Standby Current – CMOS
Clock Backup Voltage
Clock backup current
V
V
V
V
Input Leakage Current
Output Leakage Current
Input High Voltage
Input Low Voltage
Output High Voltage (I
Output Low Voltage (I
Output Low Voltage (INT pin)
Device in backup mode (V
BAK
between V
DD
DD
DD
DD
DD
= 3.0V, I
Supply Current – Active
trip point voltage that activates INT pin
Lockout Voltage
Voltage that causes switch to V
Voltage for Active INT pin
DD
DD
< V
DD
. V
Power Supply Voltage with respect to V
Voltage on any signal pin with respect to V
Storage temperature
Lead temperature (Soldering, 10 seconds)
DD
IH
IH
BAK
drops below V
OL
, All other inputs and DQ pins at TTL levels.
, All other inputs and DQ pins at CMOS levels.
SW
OL
and V
= 4.2 mA.
; oscillator running. This parameter is characterized, not 100% tested.
= 80 uA and V
is not otherwise used for control signals or functions.
Parameter
A
SS
= -40 C to + 85 C, V
.
OL
OH
= 4.2mA)
BAK
= -2.0mA)
DD
. V
<V
OL
Description
SW
= 0.4V.
BAK
DD
is also the point at which the timekeeper draws current from the V
)
BAK
< V
LO
DD
.
= 4.5V to 5.5V unless otherwise specified)
Min
4.35
-0.5
4.5
2.5
4.2
1.2
2.0
2.4
SS
SS
V
Typ
5.0
3.0
10
BAK
-1.0V to +7.0V and
-55 C to + 125 C
V
-1.0V to +7.0V
IN
Ratings
< V
300 C
V
DD
DD
Max
4.65
4.49
V
500
150
5.5
0.8
0.4
0.7
25
10
10
1
+1.0V
DD
+ 0.5
Units
mA
V
V
V
V
V
V
V
V
V
V
V
A
A
A
A
A
Page 19 of 27
BAK
FM3808
Notes
pin,
1
2
3
4
8
5
6
7
7
9