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Cypress Semiconductor Electronic Components Datasheet

CY7C1485V33 Datasheet

2M x 36/4M x 18 Pipelined DCD SRAM

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PRELIMINARY
CY7C1484V33
CY7C1485V33
2M x 36/4M x 18 Pipelined DCD SRAM
Features
• Fast clock speed: 250, 200, and 167 MHz
• Provide high-performance 3-1-1-1 access rate
• Fast access time: 2.6, 3.0, and 3.4 ns
• Optimal for depth expansion
• Single 3.3V –5% and +5% power supply VDD
• Separate VDDQ for 3.3V or 2.5V
• Common data inputs and data outputs
• Byte Write Enable and Global Write control
• Chip enable for address pipeline
• Address, data, and control registers
• Internally self-timed Write Cycle
• Burst control pins (interleaved or linear burst
sequence)
• Automatic power-down for portable applications
• High-density, high-speed packages
• JTAG boundary scan for BGA packaging version
• Available in 119-ball bump BGA and 100-pin TQFP
packages (CY7C1484V33 and CY7C1485V33).
• 165-ball FBGA will be offered on an opportunity basis.
(Please contact Cypress sales or marketing)
Functional Description
The Cypress Synchronous Burst SRAM family employs
high-speed, low-power CMOS designs using advanced
single-layer polysilicon, triple-layer metal technology. Each
memory cell consists of six transistors.
The CY7C1484V33 and CY7C1485V33 SRAMs integrate
2,097,152 × 36/4,194,304 × 18 SRAM cells with advanced
synchronous peripheral circuitry and a two-bit counter for
Selection Guide
Maximum Access Time
Maximum Operating Current
Maximum CMOS Standby Current
Shaded areas contain advance information.
CY7C1484V33-
250
CY7C1485V33-
250
2.6
TBD
TBD
internal burst operation. All synchronous inputs are gated by
registers controlled by a positive-edge-triggered Clock Input
(CLK). The synchronous inputs include all addresses, all data
inputs, address-pipelining Chip Enable (CE), burst control
inputs (ADSC, ADSP, and ADV), write enables (BWa, BWb,
BWc, BWd, and BWE), and Global Write (GW).
Asynchronous inputs include the Output Enable (OE) and
burst mode control (MODE). The data (DQx) and the data
parity (DPx) outputs, enabled by OE, are also asynchronous.
DQa,b,c,d and DPa,b,c,d apply to CY7C1484V33 and DQa,b
and DPa,b apply to CY7C1485V33. a, b, c, and d each are
eight bits wide in the case of DQ and one bit wide in the case
of DP.
Addresses and chip enables are registered with either
Address Status Processor (ADSP) or Address Status
Controller (ADSC) input pins. Subsequent burst addresses
can be internally generated as controlled by the Burst Advance
Pin (ADV).
Address, data inputs, and write controls are registered on-chip
to initiate self-timed Write cycle. Write cycles can be one to
four bytes wide as controlled by the write control inputs.
Individual byte write allows individual byte to be written. BWa
controls DQa and DPa. BWb controls DQb and DPb. BWc
controls DQc and DPd. BWd controls DQ and DPd. BWa, BWb,
BWc, BWd can be active only with BWE being LOW. GW being
LOW causes all bytes to be written. Write pass-through
capability allows written data available at the output for the
immediately next Read cycle. This device also incorporates
pipelined enable circuit for easy depth expansion without
penalizing system performance.
The CY7C1484V33/CY7C1485V33 are both double-cycle
deselect parts.All inputs and outputs of the CY7C1484V33,
CY7C1485V33 are JEDEC standard JESD8-5-compatible.
CY7C1484V33-
200
CY7C1485V33-
200
3.0
TBD
TBD
CY7C1484V33-
167
CY7C1485V33-
167
3.4
TBD
TBD
Unit
ns
mA
mA
Cypress Semiconductor Corporation • 3901 North First Street • San Jose, CA 95134 • 408-943-2600
Document #: 38-05285 Rev. *A
Revised January 18, 2003


Cypress Semiconductor Electronic Components Datasheet

CY7C1485V33 Datasheet

2M x 36/4M x 18 Pipelined DCD SRAM

No Preview Available !

Logic Block Diagram
CY7C1484V332M × 36
CLK
ADV
ADSC
ADSP
A[20:0]
GW
BWE
BW d
BWc
BWb
BWa
CE1
CE2
CE3
21
OE
ZZ
CY7C1485V334M × 18
CLK
ADV
ADSC
ADSP
A[21:0]
GW
BWE
BW b
BWa
22
CE1
CE2
CE3
OE
ZZ
PRELIMINARY
MODE
(A[1;0]) 2
BURST Q0
CE COUNTER
CLR
Q1
Q
ADDRESS
CE
D
REGISTER
19
D DQd, DPd Q
BYTEWRITE
REGISTERS
D DQc, DPc Q
BYTEWRITE
REGISTERS
D DQb, DPb Q
BYTEWRITE
REGISTERS
D DQa, DPa Q
BYTEWRITE
REGISTERS
D ENABLE CE Q
REGISTER
19
D ENABLE DELAY Q
REGISTER
SLEEP
CONTROL
MODE
(A[1;0]) 2
BURST Q0
CE COUNTER
CLR
Q1
Q
ADDRESS
CE
D
REGISTER
20
D DQb, DPb Q
BYTEWRITE
REGISTERS
D DQa, DPa Q
BYTEWRITE
REGISTERS
20
D
CE
ENABLE CE
REGISTER
Q
D ENABLE DELAY Q
REGISTER
SLEEP
CONTROL
CY7C1484V33
CY7C1485V33
21
2M × 36
MEMORY
ARRAY
36 36
OUTPUT
REGISTERS
CLK
INPUT
REGISTERS
CLK
DQa,b,c,d
DPa,b,c,d
22
4M × 18
MEMORY
ARRAY
18 18
OUTPUT
REGISTERS
CLK
INPUT
REGISTERS
CLK
DQa,b
DPa,b
Document #: 38-05285 Rev. *A
Page 2 of 29


Part Number CY7C1485V33
Description 2M x 36/4M x 18 Pipelined DCD SRAM
Maker Cypress Semiconductor
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