CY7C1511JV18 Datasheet, PDF (1/29 Pages) Cypress Semiconductor – 72-Mbit QDR-II SRAM 4-Word Burst Architecture

CY7C1511JV18, CY7C1526JV18
CY7C1513JV18, CY7C1515JV18
72-Mbit QDR™-II SRAM 4-Word
Burst Architecture
Features
■ Separate independent read and write data ports
❐ Supports concurrent transactions
■ 300 MHz clock for high bandwidth
■ 4-word burst for reducing address bus frequency
■ Double Data Rate (DDR) interfaces on both read and write ports
(data transferred at 600 MHz) at 300 MHz
■ Two input clocks (K and K) for precise DDR timing
❐ SRAM uses rising edges only
■ Two input clocks for output data (C and C) to minimize clock
skew and flight time mismatches
■ Echo clocks (CQ and CQ) simplify data capture in high speed
systems
■ Single multiplexed address input bus latches address inputs
for read and write ports
■ Separate port selects for depth expansion
■ Synchronous internally self-timed writes
■ QDR-II operates with 1.5 cycle read latency when the Delay
Lock Loop (DLL) is enabled
■ Operates similar to a QDR-I device with 1 cycle read latency
in DLL off mode
■ Available in x8, x9, x18, and x36 configurations
■ Full data coherency, providing most current data
■ Core V_DD = 1.8 (± 0.1V); IO V_DDQ = 1.4V to V_DD
■ Available in 165-ball FBGA package (15 x 17 x 1.4 mm)
■ Offered in both Pb-free and non Pb-free packages
■ Variable drive HSTL output buffers
■ JTAG 1149.1 compatible test access port
■ Delay Lock Loop (DLL) for accurate data placement
Configurations
CY7C1511JV18 – 8M x 8
CY7C1526JV18 – 8M x 9
CY7C1513JV18 – 4M x 18
CY7C1515JV18 – 2M x 36
Functional Description
The CY7C1511JV18, CY7C1526JV18, CY7C1513JV18, and
CY7C1515JV18 are 1.8V Synchronous Pipelined SRAMs,
equipped with QDR-II architecture. QDR-II architecture consists
of two separate ports: the read port and the write port to access
the memory array. The read port has dedicated data outputs to
support read operations and the write port has dedicated data
inputs to support write operations. QDR-II architecture has
separate data inputs and data outputs to completely eliminate
the need to “turn-around” the data bus that exists with common
IO devices. Each port is accessed through a common address
bus. Addresses for read and write addresses are latched on
alternate rising edges of the input (K) clock. Accesses to the
QDR-II read and write ports are completely independent of one
another. To maximize data throughput, both read and write ports
are equipped with DDR interfaces. Each address location is
associated with four 8-bit words (CY7C1511JV18), 9-bit words
(CY7C1526JV18), 18-bit words (CY7C1513JV18), or 36-bit
words (CY7C1515JV18) that burst sequentially into or out of the
device. Because data is transferred into and out of the device on
every rising edge of both input clocks (K and K and C and C),
memory bandwidth is maximized while simplifying system
design by eliminating bus “turn-arounds”.
Depth expansion is accomplished with port selects, which
enables each port to operate independently.
All synchronous inputs pass through input registers controlled by
the K or K input clocks. All data outputs pass through output
registers controlled by the C or C (or K or K in a single clock
domain) input clocks. Writes are conducted with on-chip
synchronous self-timed write circuitry.
Selection Guide
Description
Maximum Operating Frequency
Maximum Operating Current
x8
x9
x18
x36
300 MHz
300
1090
1090
1115
1140
250 MHz
250
790
795
865
1040
167 MHz
167
570
575
615
725
Unit
MHz
mA
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 001-12560 Rev. *E
• San Jose, CA 95134-1709 • 408-943-2600
Revised July 31, 2009
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