CAT24WC03 Datasheet, PDF (8/8 Pages) Catalyst Semiconductor – 2K/4K/8K/16K-Bit Serial E2PROM

CAT24WC03/05/09/17
Preliminary
The master device does not send an acknowledge but
will generate a STOP condition.
respond with an acknowledge, thus sending the STOP
condition.
Sequential Read
The Sequential READ operation can be initiated by
either the Immediate Address READ or Selective READ
operations. After the CAT24WC03/05/09/17 sends the
initial 8-bit byte requested, the Master will respond with
an acknowledge which tells the device it requires more
data. The CAT24WC03/05/09/17 will continue to output
an 8-bit byte for each acknowledge sent by the Master.
The operation is terminated when the Master fails to
Figure 9. Selective Read Timing
S
T
BUS ACTIVITY: ^A
MASTER ^R
T
SLAVE
ADDRESS
SDA LINE S
BYTE
ADDRESS (n)
The data being transmitted from the CAT24WC03/05/
09/17 is outputted sequentially with data from address N
followed by data from address N+1. The READ opera-
tion address counter increments all of the CAT24WC03/
05/09/17 address bits so that the entire memory array
can be read during one operation. If more than the E
(where E = 255 for 24WC03, 511 for 24WC05, 1023 for
24WC09, and 2047 for 24WC17) bytes are read out, the
counter will “wrap around” and continue to clock out data
bytes.
S
T
S
A
SLAVE
T
R _ADDRESS
O
T
P
S
P
A
C
K
Figure 10. Sequential Read Timing
BUS ACTIVITY: SLAVE
MASTER ADDRESS
DATA n
SDA LINE
A
C
K
DATA n+1
A
C ^{DATA n}
K
N
O
A
C
K ^{24WCXX F11}
DATA n+2
S
T
DATA n+x
O
P
P
A
A
C
C
K
K
ORDERING INFORMATION
A
A
C
C
K
K
N
O
A
C
K 5020 FHD F12
Prefix Device #
Suffix
CAT
24WC03
J
I
-1.8
TE13
Optional
Company ID
Product Number
24WC03: 2K
24WC05: 4K
24WC09: 8K
24WC17: 16K
Temperature Range
Blank = Commercial (0˚ - 70˚C)
I = Industrial (-40˚ - 85˚C)
A = Automotive (-40˚ - 105˚C)*
Tape & Reel
TE13: 2000/Reel
Package
P: PDIP
J: SOIC (JEDEC)
U: TSSOP **
Operating Voltage
Blank: 2.5V - 6.0V
1.8: 1.8V - 6.0V
* -40˚ to +125˚C is available upon request
Notes:
** Available for 24WC03
(1) The device used in the above example is a 24WC03JI-1.8TE13 (SOIC, Industrial Temperature, 1.8 Volt to 6 Volt Operating
Voltage, Tape & Reel)
Doc. No. 25063-00 2/98 S-1
8