CAT25640HU3I-GT3 ON Semiconductor, CAT25640HU3I-GT3 Datasheet - Page 9

• Manufacturer Part Number: CAT25640HU3I-GT3
• Description: EEPROM 64KB SPI SER CMOS EEPROM
• Manufacturer: ON Semiconductor

Specifications of CAT25640HU3I-GT3

• Product Category: EEPROM
• Rohs: yes
• Memory Size: 64 Kbit
• Organization: 8 K x 8
• Data Retention: 100 yr
• Maximum Clock Frequency: 10 MHz
• Maximum Operating Current: 2 mA
• Operating Supply Voltage: 1.8 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: UDFN-8
• Interface Type: SPI
• Minimum Operating Temperature: - 40 C

Byte Write
sequence, by sending a WRITE instruction, a 16−bit address
and data as shown in Figure 5. Only 13 significant address
bits are used by the CAT25640. The rest are don’t care bits,
as shown in Table 13. Internal programming will start after
the low to high CS transition. During an internal write cycle,
all commands, except for RDSR (Read Status Register) will
be ignored. The RDY bit will indicate if the internal write
cycle is in progress (RDY high), or the device is ready to
accept commands (RDY low).
Table 13. BYTE ADDRESS
CAT25640
Once the WEL bit is set, the user may execute a write
SCK
SCK
SO
CS
SO
CS
SI
SI
Dashed Line = mode (1, 1)
Dashed Line = mode (1, 1)
Device
0
0
0
0
0
0
1
1
0
0
2
HIGH IMPEDANCE
2
0
0
3
3
OPCODE
OPCODE
0
0
4
4
Address Significant Bits
0
0
5
5
1
1
6
A12 − A0
6
0
0
Figure 6. Page WRITE Timing
Figure 5. Byte WRITE Timing
7
7
A
A
N
N
8
8
BYTE ADDRESS*
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BYTE ADDRESS*
HIGH IMPEDANCE
21 22 23 24 25 26 27
21 22 23 24−31 32−39
9
Page Write
may continue sending data, up to a total of 64 bytes,
according to timing shown in Figure 6. After each data byte,
the lower order address bits are automatically incremented,
while the higher order address bits (page address) remain
unchanged. If during this process the end of page is
exceeded, then loading will “roll over” to the first byte in the
page, thus possibly overwriting previously loaded data.
Following completion of the write cycle, the CAT25640 is
automatically returned to the write disable state.
Address Don’t Care Bits
A
A
After sending the first data byte to the CAT25640, the host
0
0
Byte 1
D7 D6 D5 D4 D3 D2 D1 D0
Data
A15 − A13
* Please check the Byte Address Table (Table 13)
* Please check the Byte Address Table (Table 13)
Byte 2
Data
DATA IN
Byte 3
DATA IN
Data
24+(N−1)x8−1 .. 24+(N−1)x8
28
Data Byte N
7..1
29 30 31
# Address Clock Pulses
0
24+Nx8−1
16