PRELIMINARY
CY14B104K, CY14B104M
4 Mbit (512K x 8/256K x 16) nvSRAM with
Real Time Clock
Cypress Semiconductor Corporation
•
198 Champion Court
•
San Jose
,
CA 95134-1709
•
408-943-2600
Document #: 001-07103 Rev. *K
Revised January 29, 2009
Features
■
20 ns, 25 ns, and 45 ns access times
■
Internally organized as 512K x 8 (CY14B104K) or 256K x 16
(CY14B104M)
■
Hands off automatic STORE
on power down with only a small
capacitor
■
STORE
to QuantumTrap
®
nonvolatile elements is initiated by
software, device pin, or AutoStore
®
on power down
■
RECALL
to SRAM initiated by software or power up
■
High reliability
■
Infinite Read, Write, and RECALL cycles
■
200,000 STORE
cycles to QuantumTrap
■
20 year data retention
■
Single 3V +20%, –10% operation
■
Data integrity of Cypress nvSRAM combined with full featured
Real Time Clock
■
Watchdog timer
■
Clock alarm with programmable interrupts
■
Capacitor or battery backup for RTC
■
Commercial and industrial temperatures
■
44 and 54-pin TSOP II package
■
Pb-free and RoHS compliance
Functional Description
The Cypress CY14B104K/CY14B104M combines a 4-Mbit
nonvolatile static RAM with a full featured Real Time Clock in a
monolithic integrated circuit. The embedded nonvolatile
elements incorporate QuantumTrap technology producing the
world’s most reliable nonvolatile memory. The SRAM is read and
written infinite number of times, while independent nonvolatile
data resides in the nonvolatile elements.
The Real Time Clock function provides an accurate clock with
leap year tracking and a programmable, high accuracy oscillator.
The alarm function is programmable for periodic minutes, hours,
days or months alarms. There is also a programmable watchdog
timer for process control.
STATIC RAM
ARRAY
2048 X 2048
R
O
W
D
E
C
O
D
E
R
COLUMN I/O
COLUMN DEC
I
N
P
U
T
B
U
F
F
E
R
S
POWER
CONTROL
STORE/RECALL
CONTROL
Quatrum
Trap
2048 X 2048
STORE
RECALL
V
CC
V
CA
P
HSB
A
9
A
10
A
11
A
12
A
13
A
14
A
15
A
16
SOFTWARE
DETECT
A
14
- A
2
OE
CE
WE
BHE
BLE
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
A
17
A
18
DQ
0
DQ
1
DQ
2
DQ
3
DQ
4
DQ
5
DQ
6
DQ
7
DQ
8
DQ
9
DQ
10
DQ
11
DQ
12
DQ
13
DQ
14
DQ
15
RTC
MUX
A
18
- A
0
X
1
X
2
INT
V
RTCbat
V
RTCcap
Logic Block Diagram
[1, 2, 3]
Notes
1. Address A
0
- A
18
for x8 configuration and Address A
0
- A
17
for x16 configuration.
2. Data DQ
0
- DQ
7
for x8 configuration and Data DQ
0
- DQ
15
for x16 configuration.
3. BHE and BLE are applicable for x16 configuration only.
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