FM33256B-G Cypress Semiconductor, FM33256B-G Datasheet - Page 25

• Manufacturer Part Number: FM33256B-G
• Description: Real Time Clock 256Kb F-RAM Processor Companion
• Manufacturer: Cypress Semiconductor

Specifications of FM33256B-G

• Rohs: yes
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 2.7 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC-14
• Factory Pack Quantity: 56

Notes
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
AC Parameters (T
Notes
1.
2.
3.
This product conforms to specifications per the terms of the Ramtron
standard warranty. The product has completed Ramtron’s internal
qualification testing and has reached production status.
Rev. 3.0
Aug. 2012
DC Operating Conditions, continued
Symbol
V
V
V
R
V
V
Symbol
f
t
t
t
t
t
t
t
t
t
t
t
t
CH
CL
CSU
CSH
OD
ODV
OH
D
R
F
SU
H
CK
RST
IH
OL
OH
PFI
HYS
Full complete operation. Supervisory circuits, RTC, etc operate to lower voltages as specified.
SCK toggling between V
All inputs at V
The VBAK trickle charger automatically regulates the maximum voltage on this pin for capacitor backup applications.
V
V
This is the V
This is the V
/RST is asserted active when V
The minimum V
V
Includes /RST input detection of external reset condition to trigger driving of /RST signal by FM33256B.
t
This parameter is characterized but not 100% tested.
Rise and fall times measured between 10% and 90% of waveform.
CH
DD
BAK
IN
+ t
or V
< V
will source current when trickle charge is enabled (VBC bit=1), V
CL
Parameter
Input High Voltage
Output Low Voltage @ I
Output High Voltage
Pull-up resistance for /RST inactive
Power Fail Input Reference Voltage
Power Fail Input (PFI) Hysteresis (Rising)
SW
OUT
= 1/f
(SO, PFO) @ I
All inputs except as listed below
CNT battery-backed (V
CNT (V
CNT battery-backed (V
CNT V
PFI
, oscillator running, CNT at VBAK.
Parameter
SCK 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
Data In Rise Time
Data In Fall Time
Data Setup Time
Data Hold Time
= V
DD
DD
CK
SS
supply current contributed by enabling the trickle charger circuit, and does not account for I
supply current contributed by enabling the watchdog circuit, WDE=1 and WDET set to a non-zero value.
SS
.
DD
A
or V
= -40°C to + 85°C, V
to V
DD
to guarantee the level of /RST remains a valid V
DD
DD,
> V
> V
DD
static. Trickle charger off (VBC=0).
DD
. Does not apply to PFI, X1, or X2.
SW
OH
SW
-0.3V and V
= -2 mA
)
DD
< V
OL
DD
DD
TP
= 3 mA
SS
< V
< V
.
(T
, other inputs V
DD
A
SW
SW
= -40° C to + 85° C, V
= 2.7V to 3.6V C
)
)
SS
or V
V
V
0.7 V
0.7 V
DD
BAK
DD
L
1.475
Min
-0.3
-0.3
-0.3V.
= 30 pF)
50
DD
OL
-
-
– 0.8
– 0.5
DD
DD
= 2.7V to 3.6V unless otherwise specified)
level.
DD
> V
Min
28
28
10
10
90
0
0
6
6
BAK
Typ
1.50
1850 Ramtron Drive, Colorado Springs, CO 80921
FM33256B SPI Companion w/ FRAM
-
, and V
Ramtron International Corporation
V
BAK
V
V
V
Max
BAK
16
20
24
50
50
DD
DD
DD
1.525
Max
400
100
0.5
0.8
0.4
< V
(800) 545-FRAM, [phone]
-
+ 0.3
+ 0.3
+ 0.3
+ 0.3
BAK
max.
Units
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Units
www.ramtron.com
KΩ
mV
BAKTC
V
V
V
V
V
V
V
V
V
Page 25 of 28
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Notes
1,3
1,3
Notes
1
1
2