CY7C1339B-133AI Cypress Semiconductor Corp, CY7C1339B-133AI Datasheet - Page 7
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CY7C1339B-133AI
Manufacturer Part Number
CY7C1339B-133AI
Description
Manufacturer
Cypress Semiconductor Corp
Datasheet
1.CY7C1339B-133AI.pdf
(17 pages)
Specifications of CY7C1339B-133AI
Density
4Mb
Access Time (max)
4ns
Operating Supply Voltage (typ)
3.3V
Package Type
TQFP
Operating Temp Range
-40C to 85C
Supply Current
375mA
Operating Supply Voltage (min)
3.13V
Operating Supply Voltage (max)
3.6V
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
100
Word Size
32b
Lead Free Status / Rohs Status
Not Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
CY7C1339B-133AI
Manufacturer:
CYPRESS
Quantity:
1 831
Document #: 38-05141 Rev. *A
Write Cycle Descriptions
Read
Read
Write Byte 0 – DQ
Write Byte 1 – DQ
Write Bytes 1, 0
Write Byte 2 – DQ
Write Bytes 2, 0
Write Bytes 2, 1
Write Bytes 2, 1, 0
Write Byte 3 – DQ
Write Bytes 3, 0
Write Bytes 3, 1
Write Bytes 3, 1, 0
Write Bytes 3, 2
Write Bytes 3, 2, 0
Write Bytes 3, 2, 1
Write All Bytes
Write All Bytes
Notes:
4.
5.
6.
X = “don't care,” 1 = Logic HIGH, 0 = Logic LOW.
The SRAM always initiates a Read cycle when ADSP asserted, regardless of the state of GW, BWE, or BW
after the ADSP or with the assertion of ADSC. As a result, OE must be driven HIGH prior to the start of the Write cycle to allow the outputs to three-state. OE
is a don't care for the remainder of the Write cycle.
OE is asynchronous and is not sampled with the clock rise. It is masked internally during Write cycles. During a Read cycle DQ = High-Z when OE is inactive
or when the device is deselected, and DQ = data when OE is active.
[23:16]
[31:24]
Function
[15:8]
[7:0]
[4, 5, 6]
GW
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
BWE
X
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
BW
X
X
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
3
[3:0].
Writes may occur only on subsequent clocks
BW
X
X
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
2
BW
CY7C1339B
X
X
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
Page 7 of 17
BW
X
X
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0