CY7C1523AV18-250BZC Cypress Semiconductor Corp, CY7C1523AV18-250BZC Datasheet - Page 6

• Manufacturer Part Number: CY7C1523AV18-250BZC
• Description: IC SRAM 72MBIT 250MHZ 165TFBGA
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C1523AV18-250BZC

• Format - Memory: RAM
• Memory Type: SRAM - Synchronous, DDR II
• Memory Size: 72M (4M x 18)
• Speed: 250MHz
• Interface: Parallel
• Voltage - Supply: 1.7 V ~ 1.9 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 165-TFBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS compliant by exemption

Pin Definitions
Document #: 001-06981 Rev. *D
D
LD
NWS
NWS
BWS
BWS
BWS
BWS
A
Q
R/W
C
C
K
K
Pin Name
[x:0]
[x:0]
0
1
2
3
0
1
,
,
,
,
Synchronous
Synchronous
Synchronous
Synchronous
Synchronous
Synchronous
Input Clock
Input Clock
Input Clock
Input Clock
Outputs-
Input-
Input-
Input-
Input-
Input-
IO
Data Input Signals. Sampled on the rising edge of K and K clocks during valid write operations.
CY7C1522AV18 - D
CY7C1529AV18 - D
CY7C1523AV18 - D
CY7C1524AV18 - D
Synchronous Load. This input is brought LOW when a bus cycle sequence is defined. This definition
includes address and read/write direction. All transactions operate on a burst of 2 data (one clock period
of bus activity).
Nibble Write Select 0, 1 − Active LOW (CY7C1522AV18 Only). Sampled on the rising edge of the K
and K clocks during Write operations. Used to select which nibble is written into the device during the
current portion of the Write operations.Nibbles not written remain unaltered.
NWS
All Nibble Write Selects are sampled on the same edge as the data. Deselecting a Nibble Write Select
ignores the corresponding nibble of data and it is not written into the device.
Byte Write Select 0, 1, 2 and 3 − Active LOW. Sampled on the rising edge of the K and K clocks during
write operations. Used to select which byte is written into the device during the current portion of the write
operations. Bytes not written remain unaltered.
CY7C1529AV18 − BWS
CY7C1523AV18 − BWS
CY7C1524AV18 − BWS
D
All the Byte Write Selects are sampled on the same edge as the data. Deselecting a Byte Write Select
ignores the corresponding byte of data and it is not written into the device.
Address Inputs. Sampled on the rising edge of the K clock during active read and write operations. These
address inputs are multiplexed for both read and write operations. Internally, the device is organized as
8M x 8 (2 arrays each of 4M x 8) for CY7C1522AV18, 8M x 9 (2 arrays each of 4M x 9) for CY7C1529AV18,
4M x 18 (2 arrays each of 2M x 18) for CY7C1523AV18 and 2M x 36 (2 arrays each of 1M x 36) for
CY7C1524AV18. Therefore, only 22 address inputs are needed to access the entire memory array of
CY7C1522AV18 and CY7C1529AV18, 21 address inputs for CY7C1523AV18 and 20 address inputs for
CY7C1524AV18. These inputs are ignored when the appropriate port is deselected.
Data Output Signals. These pins drive out the requested data during a read operation. Valid data is
driven out on the rising edge of both the C and C clocks during read operations, or K and K when in single
clock mode. When the read port is deselected, Q
CY7C1522AV18 − Q
CY7C1529AV18 − Q
CY7C1523AV18 − Q
CY7C1524AV18 − Q
Synchronous Read/Write Input. When LD is LOW, this input designates the access type (read when
R/W is HIGH, write when R/W is LOW) for the loaded address. R/W must meet the setup and hold times
around the edge of K.
Positive Input Clock for Output Data. C is used in conjunction with C to clock out the read data from
the device. C and C can be used together to deskew the flight times of various devices on the board back
to the controller. See
Negative Input Clock for Output Data. C is used in conjunction with C to clock out the read data from
the device. C and C can be used together to deskew the flight times of various devices on the board back
to the controller. See
Positive Input Clock Input. The rising edge of K is used to capture synchronous inputs to the device
and to drive out data through Q
edge of K.
Negative Input Clock Input. K is used to capture synchronous inputs being presented to the device and
to drive out data through Q
[35:27].
0
controls D
[3:0]
[7:0]
[8:0]
[17:0]
[35:0]
[7:0]
[8:0]
[17:0]
[35:0]
and NWS
Application Example
Application Example
0
0
0
controls D
controls D
controls D
[x:0]
1
when in single clock mode.
[x:0]
controls D
[8:0]
when in single clock mode. All accesses are initiated on the rising
[8:0]
[8:0]
, BWS
, BWS
[7:4]
on page 9 for further details.
on page 9 for further details.
Pin Description
1
1
.
controls D
controls D
[x:0]
CY7C1522AV18, CY7C1529AV18
CY7C1523AV18, CY7C1524AV18
are automatically tri-stated.
[17:9]
[17:9]
,BWS
.
2
controls D
[26:18]
and BWS
Page 6 of 30
3
controls
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