fm3808 Ramtron Corporation, fm3808 Datasheet - Page 21

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

Supervisor AC Parameters (T
Notes
1
2
Data Retention (
Capacitance
Notes
1
2
AC Test Conditions
Input Pulse Levels
Input rise and fall times
Input and output timing levels
Rev. 1.3 (EOL)
Feb. 2006
Symbol
t
t
Data Retention
C
C
C
Symbol
IPU
FCO
IO
I
XTAL
P/L = 1; pulse mode.
P/L= 0; level mode. From the end of the access where the Flags/Control register is read and the flag cleared.
This parameter is periodically sampled and not 100% tested.
The crystal attached to the X1/X2 pins must be rated as 6pF max.
Input/output capacitance (DQ)
Input capacitance
X1, X2 Crystal pin capacitance
(T
Parameter
INT output pulse width
Flags/Control register access to INT pin clear
A
V
Parameter
= 25 C, f=1.0 MHz, V
DD
= 4.5V to 5.5V unless otherwise specified)
Parameter
A
= -40 C to + 85 C, V
0 to 3V
10 ns
1.5V
DD
= 5V)
Min
10
Max
DD
12
8
6
= 4.5V to 5.5V unless otherwise specified)
Equivalent AC Load Circuit
Years
Min
Units
150
Units
-
Output
pF
pF
pF
Typ
200
1.3V
Notes
Notes
1, 2
1
1
3300
50 pF
Max
300
100
Units
ms
ns
Page 21 of 27
Notes
FM3808
1
2