CAT24C44 Catalyst Semiconductor, CAT24C44 Datasheet - Page 2

• Manufacturer Part Number: CAT24C44
• Description: 256-Bit Serial Nonvolatile CMOS Static RAM
• Manufacturer: Catalyst Semiconductor

MODE SELECTION
POWER-UP TIMING
Note:
(1) The store operation has priority over all the other operations.
(2) The store operation is inhibited when V
(3) NOP designates that the device is not currently executing an instruction.
(4) This parameter is tested initially and after a design or process change that affects the parameter.
Doc. No. 25019-0A 2/98 N-1
BLOCK DIAGRAM
Symbol
VCCSR
X = Don’t Care
Hardware Recall
Software Recall
Hardware Store
Software Store
t
t
puw
pur
Mode
CE
SK
DI
Power-Up to Write or Store Operation
(3)
Power-Up to Read Operations
(3)
(4)
(1)(2)
V
INSTRUCTION
INSTRUCTION
CC
Parameter
REGISTER
STORE
STORE
DECODE
DECODE
STORE
STORE
STORE
Slew Rate
ROW
1
1
0
1
CC
is below
STATIC RAM
3.5V.
COLUMN
DECODE
256-BIT
ARRAY
COUNTER
RECALL
RECALL
RECALL
RECALL
RECALL
4-BIT
0
1
1
1
E
2
PROM ARRAY
2
Min.
0.5
RECALL
STORE
Instruction
Software
NOP
NOP
RCL
STO
0.005
Max.
CONTROL
200
5
LOGIC
Write Enable Previous Recall
Latch
SET
SET
X
X
STORE
RECALL
DO
V CC
V SS
Units
V/m
ms
s
TRUE
TRUE
Latch
X
X
5157 FHD F09