23A640-I/ST Microchip Technology, 23A640-I/ST Datasheet - Page 7

• Manufacturer Part Number: 23A640-I/ST
• Description: IC SRAM 64KBIT 20MHZ 8TSSOP
• Manufacturer: Microchip Technology
• Type: Synchronousr

Specifications of 23A640-I/ST

• Memory Size: 64K (8K x 8)
• Package / Case: 8-TSSOP
• Format - Memory: RAM
• Memory Type: SRAM
• Speed: 20MHz
• Interface: SPI Serial
• Voltage - Supply: 1.7 V ~ 1.95 V
• Operating Temperature: -40°C ~ 85°C
• Access Time: 32 ns
• Maximum Clock Frequency: 16 MHz
• Supply Voltage (max): 1.95 V
• Supply Voltage (min): 1.5 V
• Maximum Operating Current: 10 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Number Of Ports: 1
• Operating Supply Voltage: 1.8 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

FIGURE 2-3:
FIGURE 2-4:
© 2009 Microchip Technology Inc.
SCK
SCK
SCK
SCK
CS
CS
CS
CS
SO
SO
SI
SI
SI
SI
0
0
0
0
7
32
1
0
7
0
32
1
PAGE READ SEQUENCE
6
Instruction
0
33
2
Instruction
0
6
33
2
Page X, Word Y+1
Page X, Word Y+1
PAGE WRITE SEQUENCE
5
3
0
5
0
34 35 36 37 38 39
3
34 35 36 37 38 39
4
0
4
0
4
4
3
High Impedance
5
0
3
0
5
1
2
1
6
2
6
0
1
7
1
1
7
15 14 13 12
15 14 13 12
0
8
0
8
9 10 11
9 10 11
7
16-bit Address
Page X, Word Y
Preliminary
Page X, Word Y
16-bit Address
7
6
6
Page X, Word 31
Page X, Word 31
5
5
4
4
21 22 23 24 25 26 27 28 29 30 31
3
2
21 22 23 24 25 26 27 28 29 30 31
2
3
2
1
1
2
1
0
0
1
7
0
23A640/23K640
7
0
6
7
6
7
Page X, Word Y
Page X, Word Y
5
6
5
6
Page X, Word 0
Page X, Word 0
4
5
4
5
3
4
3
4
3
2
2
3
2
1
1
DS22126B-page 7
2
1
0
0
1
0
0