DatasheetsPDF.com

Static RAM. CY7C024E Datasheet

DatasheetsPDF.com

Static RAM. CY7C024E Datasheet






CY7C024E RAM. Datasheet pdf. Equivalent




CY7C024E RAM. Datasheet pdf. Equivalent





Part

CY7C024E

Description

Dual-Port Static RAM



Feature


CY7C024E CY7C025E CY7C0251E 4K × 16 and 8K × 16/18 Dual-Port Static RAM with SEM, INT, BUSY 4K × 16 and 8K × 16/1 8 Dual-Port Static RAM with SEM, INT, B USY Features ■ True dual-ported memor y cells that allow simultaneous reads o f the same memory location ■ 4K × 16 organization (CY7C024E) ■ 8K × 16 o rganization (CY7C025E) ■ 8K × 18 org anization (CY7C0251E) ■ 0.35-µ co.
Manufacture

Cypress Semiconductor

Datasheet
Download CY7C024E Datasheet


Cypress Semiconductor CY7C024E

CY7C024E; mplementary metal oxide semiconductor (C MOS) for optimum speed and power ■ Hi gh-speed access: 15 ns ■ Low operatin g power: ICC = 180 mA (typ), ISB3 = 0.0 5 mA (typ) ■ Fully asynchronous opera tion ■ Automatic power-down ■ Expan dable data bus to 32/36 bits or more us ing master/slave chip select when using more than one device ■ On-chip arbit ration logic ■ Semaphores incl.


Cypress Semiconductor CY7C024E

uded to permit software handshaking betw een ports ■ INT flag for port-to-port communication ■ Separate upper-byte and lower-byte control ■ Pin select f or master or slave ■ Available in Pb- free 100-pin thin quad flatpack .


Cypress Semiconductor CY7C024E

.

Part

CY7C024E

Description

Dual-Port Static RAM



Feature


CY7C024E CY7C025E CY7C0251E 4K × 16 and 8K × 16/18 Dual-Port Static RAM with SEM, INT, BUSY 4K × 16 and 8K × 16/1 8 Dual-Port Static RAM with SEM, INT, B USY Features ■ True dual-ported memor y cells that allow simultaneous reads o f the same memory location ■ 4K × 16 organization (CY7C024E) ■ 8K × 16 o rganization (CY7C025E) ■ 8K × 18 org anization (CY7C0251E) ■ 0.35-µ co.
Manufacture

Cypress Semiconductor

Datasheet
Download CY7C024E Datasheet




 CY7C024E
CY7C024E
CY7C025E
CY7C0251E
4K × 16 and 8K × 16/18
Dual-Port Static RAM with SEM, INT, BUSY
4K × 16 and 8K × 16/18 Dual-Port Static RAM with SEM, INT, BUSY
Features
True dual-ported memory cells that allow simultaneous reads
of the same memory location
4K × 16 organization (CY7C024E)
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: ICC = 180 mA (typ), ISB3 = 0.05 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 Pb-free 100-pin thin quad flatpack (TQFP) package
Functional Description
The CY7C024E and CY7C025E/CY7C0251E are low-power
CMOS 4K × 16 and 8K × 16/18 dual-port static RAMs. Various
arbitration schemes are included on the CY7C024E 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. The CY7C024E and
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 and CY7C025E/CY7C0251E are available in
100-pin Pb-free TQFP.
For a complete list of related documentation, click here.
Selection Guide
Parameter
Maximum access time (ns)
Typical operating current (mA)
Typical standby current for ISB1 (mA)
-15 -25 -55
15 25 55
190 170 150
50 40 20
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 001-62932 Rev. *H
• San Jose, CA 95134-1709 • 408-943-2600
Revised August 17, 2017




 CY7C024E
CY7C024E
CY7C025E
CY7C0251E
Logic Block Diagram
R/WL
UB L
LB L
CE L
OE L
R/WR
UB R
LBR
CER
OE R
[10]
I/O 8L – I/O 15L
I/O
0L
I/O
[9]
7L
[6]
BUSYL
(CY7C025E/0251E) A12L
A11L
A0L
R/W L
SEML
INTL
I/O
CONTROL
I/O
CONTROL
ADDRESS
DECODER
MEMORY
ARRAY
ADDRESS
DECODER
CE L
OE L
UB L
LB L
INTERRUPT
SEMAPHORE
ARBITRATION
M/S
CE R
OE R
UB R
LB R
I/O8R I/O15R[3]
I/O 0RI/O 7R [2]
[1]
BUSYR
A12R (CY7C025E/0251E)
A11R
A0R
R/W R
SEM R
INTR
Notes
1. BUSY is an output in master mode and an input in slave mode.
2. I/O0–I/O8 on the CY7C0251E.
3. I/O9–I/O17 on the CY7C0251E.
Document Number: 001-62932 Rev. *H
Page 2 of 24




 CY7C024E
CY7C024E
CY7C025E
CY7C0251E
Contents
Pin Configurations ........................................................... 4
Pin Definitions .................................................................. 5
Architecture ...................................................................... 6
Functional Overview ........................................................ 6
Write Operation ........................................................... 6
Read Operation ........................................................... 7
Interrupts ..................................................................... 7
Busy ............................................................................ 8
Master/Slave ............................................................... 8
Semaphore Operation ................................................. 8
Maximum Ratings ............................................................. 9
Operating Range ............................................................... 9
Electrical Characteristics ................................................. 9
Capacitance .................................................................... 10
AC Test Loads and Waveforms ..................................... 10
Data Retention Mode ...................................................... 10
Data Retention Timing ................................................... 10
Switching Characteristics .............................................. 11
Switching Waveforms .................................................... 13
Ordering Information ...................................................... 19
4K × 16 Dual-Port SRAM .......................................... 19
8K × 16 Dual-Port SRAM .......................................... 19
Ordering Code Definitions ......................................... 19
Package Diagrams .......................................................... 20
Acronyms ........................................................................ 21
Document Conventions ................................................. 21
Units of Measure ....................................................... 21
Document History Page ................................................. 22
Sales, Solutions, and Legal Information ...................... 24
Worldwide Sales and Design Support ....................... 24
Products .................................................................... 24
PSoC® Solutions ...................................................... 24
Cypress Developer Community ................................. 24
Technical Support ..................................................... 24
Document Number: 001-62932 Rev. *H
Page 3 of 24



Recommended third-party CY7C024E Datasheet






@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)