CY7C0251-25AXC

CY7C0251-25AXC Datasheet


CY7C024/024A/0241 CY7C025/0251

Part Datasheet
CY7C0251-25AXC CY7C0251-25AXC CY7C0251-25AXC (pdf)
Related Parts Information
CY7C025-15AXC CY7C025-15AXC CY7C025-15AXC
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CY7C0251-15AXC CY7C0251-15AXC CY7C0251-15AXC
CY7C024-15AXC CY7C024-15AXC CY7C024-15AXC
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CY7C024-25AXC CY7C024-25AXC CY7C024-25AXC
CY7C024-25AXCT CY7C024-25AXCT CY7C024-25AXCT
CY7C024-25AXI CY7C024-25AXI CY7C024-25AXI
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CY7C0241-25AXC CY7C0241-25AXC CY7C0241-25AXC
CY7C025-15AXCT CY7C025-15AXCT CY7C025-15AXCT
CY7C025-15AXI CY7C025-15AXI CY7C025-15AXI
CY7C025-25AXC CY7C025-25AXC CY7C025-25AXC
CY7C025-25AXCT CY7C025-25AXCT CY7C025-25AXCT
CY7C025-25AXI CY7C025-25AXI CY7C025-25AXI
CY7C025-25JXCT CY7C025-25JXCT CY7C025-25JXCT
CY7C025-55AXC CY7C025-55AXC CY7C025-55AXC
CY7C025-55JXC CY7C025-55JXC CY7C025-55JXC
CY7C0251-15AXCT CY7C0251-15AXCT CY7C0251-15AXCT
CY7C024-55AXCT CY7C024-55AXCT CY7C024-55AXCT
CY7C0241-25AXCT CY7C0241-25AXCT CY7C0241-25AXCT
CY7C0251-15AC CY7C0251-15AC CY7C0251-15AC
CY7C025-25JC CY7C025-25JC CY7C025-25JC
CY7C025-15AC CY7C025-15AC CY7C025-15AC
CY7C024-15AC CY7C024-15AC CY7C024-15AC
CY7C025-25AC CY7C025-25AC CY7C025-25AC
CY7C024-55AC CY7C024-55AC CY7C024-55AC
CY7C0241-55AXI CY7C0241-55AXI CY7C0241-55AXI
CY7C024-25JXI CY7C024-25JXI CY7C024-25JXI
CY7C024A-25JXC CY7C024A-25JXC CY7C024A-25JXC
CY7C025-25JXI CY7C025-25JXI CY7C025-25JXI
CY7C0241-15AXC CY7C0241-15AXC CY7C0241-15AXC
CY7C0241-15AXI CY7C0241-15AXI CY7C0241-15AXI
PDF Datasheet Preview
CY7C024/024A/0241 CY7C025/0251
4K x 16/18 and 8K x 16/18 Dual-Port Static RAM with SEM, INT, BUSY
• True dual-ported memory cells, which allow simultaneous reads of the same memory location
• 4K x 16 organization CY7C024/024A[1]
• 4K x 18 organization CY7C0241
• 8K x 16 organization CY7C025
• 8K x 18 organization CY7C0251
• micron CMOS for optimum speed and power
• High speed access 15 ns
• Low operating power ICC = 150 mA typ
• 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 84-pin Pb-free PLCC, 84-pin PLCC, 100-pin

Pb-free TQFP, and 100-pin TQFP

Functional Description

The CY7C024/024A/0241 and CY7C025/0251 are low power CMOS 4K x 16/18 and 8K x 16/18 dual-port static RAMs. Various arbitration schemes are included on the CY7C024/ 0241 and CY7C025/0251 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. The CY7C024/ 0241 and CY7C025/0251 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 chip select CE pin.

The CY7C024/024A/0241 and CY7C025/0251 are available in 84-pin Pb-free PLCCs, 84-pin PLCCs CY7C024 and CY7C025 only , 100-pin Pb-free Thin Quad Plastic Flatplack TQFP , and 100-pin Thin Quad Plastic Flatpack.

Note CY7C024 and CY7C024A are functionally identical.
• San Jose, CA 95134-1709
• 408-943-2600
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CY7C024/024A/0241 CY7C025/0251

Logic Block Diagram

L OE L

R/WR UBR

LBR CER
[4] I/O 8L I/O 15L
[3] 7L
[2] BUSYL

CY7C025/0251 A12L

A11L

Pin Configurations

R/W L SEM L INT L

I/O CONTROL

I/O CONTROL

ADDRESS DECODER

MEMORY ARRAY

ADDRESS DECODER

UB L LB L

INTERRUPT SEMAPHORE ARBITRATION

OE R UB R LB R

Figure 84-Pin PLCC Top View

I/O8R I/O15R[4]
[3] 7R
[2] BUSYR

A12R CY7C025/0251

A11R

R/W R SEM R
Ordering Information 4K x16 Dual-Port SRAM

Speed ns 15 25
Ordering Code CY7C024-15AXC CY7C024-15JXC CY7C024-25AXC CY7C024A-25JXC CY7C024-25AXI CY7C024-25JXI CY7C024-35AXC CY7C024-35JXC CY7C024-35AXI CY7C024-35JXI CY7C024-55AXC CY7C024-55JXC CY7C024-55AXI CY7C024-55JXI

Package Name A100 J83 A100 J83 A100 J83 A100 J83 A100 J83 A100 J83 A100 J83

Package Type 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 84-Pin Plastic Leaded Chip Carrier 84-Pin Pb Free Plastic Leaded Chip Carrier 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 84-Pin Plastic Leaded Chip Carrier 84-Pin Pb Free Plastic Leaded Chip Carrier 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 84-Pin Plastic Leaded Chip Carrier 84-Pin Pb Free Plastic Leaded Chip Carrier 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 84-Pin Plastic Leaded Chip Carrier 84-Pin Pb Free Plastic Leaded Chip Carrier 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 84-Pin Plastic Leaded Chip Carrier 84-Pin Pb Free Plastic Leaded Chip Carrier 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 84-Pin Plastic Leaded Chip Carrier 84-Pin Pb Free Plastic Leaded Chip Carrier 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 84-Pin Plastic Leaded Chip Carrier 84-Pin Pb Free Plastic Leaded Chip Carrier
Ordering Information 8K x 16 Dual-Port SRAM

Speed ns
Ordering Code CY7C025-15AXC CY7C025-15JXC CY7C025-15AXI

Package Name A100 J83 A100

Package Type 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 84-Pin Plastic Leaded Chip Carrier 84-Pin Pb Free Plastic Leaded Chip Carrier 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack

Operating Range

Commercial

Commercial

Industrial

Commercial

Industrial

Commercial

Industrial

Operating Range

Commercial

Industrial

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CY7C024/024A/0241 CY7C025/0251
Ordering Information 8K x 16 Dual-Port SRAM continued

Speed ns 25
Ordering Code CY7C025-25AXC CY7C025-25JXC CY7C025-25AXI CY7C025-25JXI CY7C025-35AXC CY7C025-35JXC CY7C025-35AXI CY7C025-35JXI CY7C025-55AXC CY7C025-55JXC CY7C025-55AXI CY7C025-55JXI

Package Name A100 J83 A100 J83 A100 J83 A100 J83 A100 J83 A100 J83

Package Type 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 84-Pin Plastic Leaded Chip Carrier 84-Pin Pb Free Plastic Leaded Chip Carrier 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 84-Pin Plastic Leaded Chip Carrier 84-Pin Pb Free Plastic Leaded Chip Carrier 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 84-Pin Plastic Leaded Chip Carrier 84-Pin Pb Free Plastic Leaded Chip Carrier 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 84-Pin Plastic Leaded Chip Carrier 84-Pin Pb Free Plastic Leaded Chip Carrier 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 84-Pin Plastic Leaded Chip Carrier 84-Pin Pb Free Plastic Leaded Chip Carrier 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 84-Pin Plastic Leaded Chip Carrier 84-Pin Pb Free Plastic Leaded Chip Carrier
Ordering Information 4K x 18 Dual-Port SRAM

Speed ns 15
Ordering Code CY7C0241-15AXC CY7C0241-15AXI CY7C0241-25AXC CY7C0241-25AXI CY7C0241-35AXC CY7C0241-35AXI

Package Name A100

Package Type 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack

Operating Range

Commercial

Industrial

Commercial

Industrial

Commercial

Industrial

Operating Range

Commercial Industrial Commercial Industrial Commercial Industrial

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CY7C024/024A/0241 CY7C025/0251
Ordering Information 4K x 18 Dual-Port SRAM continued

Speed ns
Ordering Code CY7C0241-55AXC CY7C0241-55AXI

Package Name A100

Package Type 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack
8K x 18 Dual-Port SRAM

Speed ns 15 25
Ordering Code CY7C0251-25AXC

Package Name A100

Package Type 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack 100-Pin Thin Quad Flat Pack 100-Pin Pb Free Thin Quad Flat Pack

Operating Range

Commercial Industrial

Operating Range

Commercial Industrial Commercial Industrial Commercial Industrial

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CY7C024/024A/0241 CY7C025/0251

Package Diagrams

Figure 100-Pin Pb-Free Thin Plastic Quad Flat Pack TQFP A100

Figure 84-Pin Pb Free Plastic Leaded Chip Carrier J83
51-85048-*C
51-85006-*A

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CY7C024/024A/0241 CY7C025/0251

Document History Page

Document Title CY7C024/024A/0241, CY7C025/0251 4K x 16/18 and 8K x 16/18 Dual-Port Static RAM with Sem, Int, Busy Document Number 38-06035

ECN No.

Orig. of Submission

Change

Description of Change
110177
09/29/01 Change from Spec number 38-00255 to 38-06035
122286
12/27/02 Power up requirements added to Maximum Ratings Information
236754

See ECN Removed cross information from features section
279132

See ECN Added Lead Pb -Free packaging information
2623540 VKN/PYRS 12/17/08 Added CY7C024A part
Updated Ordering information table

Sales, Solutions, and Legal Information

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More datasheets: CY7C0241-25AXC | CY7C025-15AXCT | CY7C025-15AXI | CY7C025-25AXC | CY7C025-25AXCT | CY7C025-25AXI | CY7C025-25JXCT | CY7C025-55AXC | CY7C025-55JXC | CY7C0251-15AXCT


Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived CY7C0251-25AXC Datasheet file may be downloaded here without warranties.

Datasheet ID: CY7C0251-25AXC 507851