CY7C025E-25AXC Cypress Semiconductor Corp, CY7C025E-25AXC Datasheet

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CY7C025E-25AXC

Manufacturer Part Number
CY7C025E-25AXC
Description
CY7C025E-25AXC
Manufacturer
Cypress Semiconductor Corp
Datasheet

Specifications of CY7C025E-25AXC

Format - Memory
RAM
Memory Type
SRAM - Dual Port, Asynchronous
Memory Size
128K (8K x 16)
Speed
25ns
Interface
Parallel
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
0°C ~ 70°C
Package / Case
100-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
428-3072

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
CY7C025E-25AXC
Manufacturer:
Cypress Semiconductor Corp
Quantity:
10 000
Part Number:
CY7C025E-25AXCT
Manufacturer:
Cypress Semiconductor Corp
Quantity:
10 000
Features
Selection Guide
Cypress Semiconductor Corporation
Document Number: 001-62932 Rev. *A
Maximum access time (ns)
Typical operating current (mA)
Typical standby current for I
True dual-ported memory cells that allow simultaneous reads
of the same memory location
4K ×16 organization (CY7C024E)
4K × 18 organization (CY7C0241E)
8K × 16 organization (CY7C025E)
8K × 18 organization (CY7C0251E)
0.35-µ complementary metal oxide semiconductor (CMOS) for
optimum speed and power
High-speed access: 15 ns
Low operating power: I
Fully asynchronous operation
Automatic power-down
Expandable data bus to 32/36 bits or more using master/slave
chip select when using more than one device
On-chip arbitration logic
Semaphores included to permit software handshaking
between ports
INT flag for port-to-port communication
Separate upper-byte and lower-byte control
Pin select for master or slave
Available in Pb-free 100-pin thin quad flatpack (TQFP) package
Parameter
CC
= 180 mA (typ), I
SB1
(mA)
SB3
Dual-Port Static RAM with SEM, INT, BUSY
198 Champion Court
= 0.05 mA (typ)
–15
190
15
50
Functional Description
The CY7C024E/CY7C0241E and CY7C025E/CY7C0251E are
low-power CMOS 4K × 16/18 and 8K × 16/18 dual-port static
RAMs. Various arbitration schemes are included on the
CY7C024E/CY7C0241E and CY7C025E/CY7C0251E to handle
situations when multiple processors access the same piece of
data. Two ports are provided, permitting independent,
asynchronous access for reads and writes to any location in
memory.
CY7C025E/CY7C0251E can be used as standalone 16 or 18-bit
dual-port static RAMs or multiple devices can be combined to
function as a 32-/36-bit or wider master/ slave dual-port static
RAM. An M/S pin is provided for implementing 32-/36-bit or wider
memory applications without the need for separate master and
slave devices or additional discrete logic. Application areas
include interprocessor/multiprocessor designs, communications
status buffering, and dual-port video/graphics memory.
Each port has independent control pins: Chip Enable (CE), Read
or Write Enable (R/W), and Output Enable (OE). Two flags are
provided on each port (BUSY and INT). BUSY signals that the
port is trying to access the same location currently being
accessed by the other port. The Interrupt Flag (INT) permits
communication between ports or systems by means of a mail
box. The semaphores are used to pass a flag, or token, from one
port to the other to indicate that a shared resource is in use. The
semaphore logic is comprised of eight shared latches. Only one
side can control the latch (semaphore) at any time. Control of a
semaphore indicates that a shared resource is in use. An
automatic power-down feature is controlled independently on
each port by a CE pin.
The CY7C024E/CY7C0241E and CY7C025E/CY7C0251E are
available in 100-pin Pb-free TQFP.
4K x 16/18 and 8K x 16/18
San Jose
The
–25
170
40
25
,
CA 95134-1709
CY7C024E, CY7C0241E
CY7C025E, CY7C0251E
CY7C024E/CY7C0241E
Revised October 28, 2010
–55
150
55
20
408-943-2600
and

Related parts for CY7C025E-25AXC

CY7C025E-25AXC Summary of contents

Page 1

... Two ports are provided, permitting independent, asynchronous access for reads and writes to any location in memory. CY7C025E/CY7C0251E can be used as standalone 16 or 18-bit dual-port static RAMs or multiple devices can be combined to function as a 32-/36-bit or wider master/ slave dual-port static RAM. An M/S pin is provided for implementing 32-/36-bit or wider memory applications without the need for separate master and slave devices or additional discrete logic ...

Page 2

... Logic Block Diagram [10] I/O – I/O 8L 15L [9] I/O – I [6] BUSY L (CY7C025E/0251E) A 12L A 11L A 0L R/W SEM INT Notes 1. BUSY is an output in master mode and an input in slave mode. 2. I/O –I/O on the CY7C0241E/CY7C0251E I/O –I/O on the CY7C0241E/CY7C0251E Document Number: 001-62932 Rev. *A I/O ...

Page 3

... Electrical Characteristics Over the Operating Range ... 9 Capacitance[12] ................................................................ 9 Switching Characteristics Over the Operating Range . 10 Data Retention Mode...................................................... 12 Document Number: 001-62932 Rev. *A CY7C024E, CY7C0241E CY7C025E, CY7C0251E Timing.............................................................................. 12 Switching Waveforms .................................................... 12 Ordering Information (4K x16 Dual-Port SRAM).......... 19 Ordering Information ( Dual-Port SRAM)......... 19 Ordering Information ( Dual-Port SRAM)......... 19 Ordering Information ( Dual-Port SRAM )........ 19 Ordering Code Definition ...

Page 4

... I/O 5 10L I/O 6 11L I/O 12L 7 I/O 13L 8 GND 9 I/O 10 14L I/O 11 15L GND Notes the CY7C025E/CY7C0251E. 12L the CY7C025E/CY7C0251E. 12R Document Number: 001-62932 Rev. *A Figure 1. 100-Pin TQFP (Top View CY7C024E/CY7C025E CY7C024E, CY7C0241E CY7C025E, CY7C0251E INT 65 L BUSY ...

Page 5

... SEM SEM INT INT L R [8] [8] BUSY BUSY GND Notes the CY7C025E/CY7C0251E. 12L the CY7C025E/CY7C0251E. 12R 8. BUSY is an output in master mode and an input in slave mode. Document Number: 001-62932 Rev. *A Figure 2. 100-Pin TQFP (Top View) 100-Pin TQFP Top View CY7C0241/CY7C0251E ...

Page 6

... CY7C024E/CY7C0241E, 1FFE for the CY7C025E/CY7C0251E) is the mailbox for the left port. When one port writes to the other port’s mailbox, an interrupt is generated to the owner. The interrupt is reset when the owner reads the contents of the mailbox. The message is user-defined. Each port can read the other port’ ...

Page 7

... Data out Data out X L Data in Data Data in Data CY7C024E, CY7C0241E CY7C025E, CY7C0251E Table 3 on page 8 shows sample semaphore of each other, the semaphore is definitely SPS Operation [10] I/O –I Deselected: power-down Deselected: power-down Write to upper byte only Write to lower byte only Write to both bytes ...

Page 8

... Left port writes 1 to semaphore Right port writes 0 to semaphore Right port writes 1 to semaphore Left port writes 0 to semaphore Left port writes 1 to semaphore Notes 11. A and A , 1FFF/1FFE for the CY7C025E/CY7C0251E. 0L–12L 0R–12R 12. If BUSY =L, then no change. L 13. BUSY =L, then no change.If R Document Number: 001-62932 Rev ...

Page 9

... L – 0 Industrial  0.2 V, – 0 [16] MAX Description Test Conditions ° MHz 5 CY7C024E, CY7C0241E CY7C025E, CY7C0251E [15] ......................................–0 +7.0 V Ambient Temperature 0 °C to +70 °C –40 °C to +85 °C –15 –25 – – 2.4 – – 2.4 – – 0.4 – – 0.4 – ...

Page 10

... HZCE LZCE HZOE CY7C024E, CY7C0241E CY7C025E, CY7C0251E 893  OUTPUT 1.4 V (c) Three-State Delay(Load 3) 10%  –25 –55 Min Max Min Max 25 – 55 – 25 – – 3 – 25 – ...

Page 11

... Note 28 – 15 – – 15 – 10 – – – 10 – 15 Figure 11 – – t (actual (actual). WDD PWE DDD SD CY7C024E, CY7C0241E CY7C025E, CY7C0251E –25 –55 Max Min Max – 35 – – 0 – – 0 – – 35 – – 20 – – 0 – 15 – 25 – 3 – ...

Page 12

... This parameter is guaranteed but not tested Document Number: 001-62932 Rev. *A Data Retention Timing V CC during CE CC after V reaches the CC Parameter ICC DR1 CY7C024E, CY7C0241E CY7C025E, CY7C0251E Data Retention Mode 4.5 V 4.5 V 2 – 0 [29] Test Conditions Max Unit ...

Page 13

... RC t ACE t DOE t LZOE t LZCE t PU [30, 32, 33, 33, 34 LZCE t ABE t ACE t LZCE . This waveform cannot be used for semaphore reads access semaphore SEM = CY7C024E, CY7C0241E CY7C025E, CY7C0251E [30, 31, 32] t OHA DATA VALID [30, 33, 34] t HZCE t HZOE DATA VALID OHA t HZCE t HZCE . IL Page ...

Page 14

... If the CE or SEM LOW transition occurs simultaneously with or after the R/W LOW transition, the outputs remain in the high impedance state. Document Number: 001-62932 Rev [38] t PWE [41] t HZWE SCE LOW CE or SEM and a LOW UB or LB. PWE . CY7C024E, CY7C0241E CY7C025E, CY7C0251E [35, 36, 37 [41] t HZOE LZWE NOTE [35, 36, 37, 43 allow the I/O drivers to turn off and data to be HZWE SD Page ...

Page 15

... SPS Document Number: 001-62932 Rev SCE SOP t SD DATA VALID PWE t SWRD t SOP WRITE CYCLE READ CYCLE MATCH t SPS MATCH = CE = HIGH CY7C024E, CY7C0241E CY7C025E, CY7C0251E [44 OHA VALID ADRESS t ACE DATA VALID OUT t DOE [45, 46, 47] Page ...

Page 16

... Figure 11. Timing Diagram of Read with BUSY (M/S=HIGH) ADDRESS R R/W R DATA ADDRESS L BUSY L DATA OUTL Figure 12. Write Timing with Busy Input (M/S=LOW) R/W BUSY Note 48 LOW Document Number: 001-62932 Rev MATCH t PWE t SD VALID MATCH t BLA t WDD t PWE CY7C024E, CY7C0241E CY7C025E, CY7C0251E [48 BHA t BDD t DDD VALID Page ...

Page 17

... BUSY is asserted. PS Document Number: 001-62932 Rev. *A ADDRESS MATCH BLC ADDRESS MATCH BLC ADDRESS MISMATCH t t BLA BHA ADDRESS MISMATCH t t BLA BHA CY7C024E, CY7C0241E CY7C025E, CY7C0251E [49] t BHC t BHC [49] Page ...

Page 18

... R 51 depends on which enable pin (CE INS INR L Document Number: 001-62932 Rev. *A Figure 15. Interrupt Timing Diagrams t WC [50 [51] t INR t WC [50 [51] t INR ) is deasserted first R asserted last. L CY7C024E, CY7C0241E CY7C025E, CY7C0251E t RC READ FFF (1FFF CY7C025 READ FFE (1FFE CY7C025) Page ...

Page 19

... Ordering Information (4K x16 Dual-Port SRAM) Speed Ordering Code (ns) 15 CY7C024E-15AXC 25 CY7C024E-25AXC CY7C024E-25AXI 55 CY7C024E-55AXC Ordering Information ( Dual-Port SRAM) Speed Ordering Code (ns) 25 CY7C025E-25AXC CY7C025E-25AXI 55 CY7C025E-55AXC Ordering Information ( Dual-Port SRAM) Speed Ordering Code (ns) 15 CY7C0241E-15AXC CY7C0241E-15AXI 25 CY7C0241E-25AXC Ordering Information ( Dual-Port SRAM ) Speed Ordering Code ...

Page 20

... Package Diagrams Figure 16. 100-Pin Pb-free Thin Quad Flat Pack (TQFP) A100 Acronyms Acronym Description CMOS Complementary metal oxide semiconductor CE Chip enable OE Output enable RAM Random access memory TQFP Thin quad plastic flatpack Document Number: 001-62932 Rev. *A CY7C024E, CY7C0241E CY7C025E, CY7C0251E 51-85048 *D Page ...

Page 21

... Document History Page Document Title: CY7C024E, CY7C0241E, CY7C025E, CY7C0251E 16/18 and 8K x 16/18 Dual-Port Static RAM with SEM, INT, BUSY Document Number: 001-62932 Rev. ECN No. Orig. of Submission Change Date ** 2975554 RAME 07/09/2010 New Datasheet *A 3056347 ADMU 10/28/2010 Updated Document Number: 001-62932 Rev. *A Description of Change “ ...

Page 22

... Use may be limited by and subject to the applicable Cypress software license agreement. Document Number: 001-62932 Rev. *A All product and company names mentioned in this document are the trademarks of their respective holders. cypress.com/go/plc cypress.com/go/psoc cypress.com/go/touch cypress.com/go/USB Revised October 28, 2010 CY7C024E, CY7C0241E CY7C025E, CY7C0251E PSoC Solutions psoc.cypress.com/solutions PSoC 1 | PSoC 3 | PSoC 5 Page ...

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