FM25H20 - 2Mb SPI FRAM
AC Parameters (TA = -40°C to + 85°C, VDD = 2.7V to 3.6V, CL = 30pF)
Symbol
fCK
tCH
tCL
tSU
tSH
tOD
tODV
tOH
tD
Parameter
Min
0
Max
Units
MHz
ns
Notes
C Clock Frequency
Clock High Time
Clock Low Time
Chip Select Setup
Chip Select Hold
Output Disable Time
Output Data Valid Time
Output Hold Time
Deselect Time
40
11
11
10
10
1
1
ns
ns
ns
12
9
ns
2
0
40
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
tR
Data In Rise Time
Data In Fall Time
Data Setup Time
50
50
2,3
2,3
tF
tSU
tH
tHS
tHH
tHZ
tLZ
5
5
10
10
Data Hold Time
/HOLD Setup Time
/HOLD Hold Time
/HOLD Low to Hi-Z
/HOLD High to Data Active
20
20
2
2
Notes
1. tCH + tCL = 1/fCK
.
2. This parameter is characterized but not 100% tested.
3. Rise and fall times measured between 10% and 90% of waveform.
AC Test Conditions
Input Pulse Levels
10% and 90% of VDD
Input rise and fall times
Input and output timing levels
Output Load Capacitance
3 ns
0.5 VDD
30 pF
Capacitance (TA = 25° C, f=1.0 MHz, VDD = 3.3V)
Symbol Parameter
Min
-
-
Max
8
6
Units
pF
pF
Notes
1
1
CO
CI
Output Capacitance (Q)
Input Capacitance
Notes
1. This parameter is characterized and not 100% tested.
Data Retention (TA = -40°C to +85°C)
Symbol
Parameter
Min
10
Units
Years
Notes
TDR
Data Retention
Rev. 2.2
Sept. 2010
Page 11 of 15
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
