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Cypress Semiconductor Electronic Components Datasheet

CY7C199D Datasheet

256K (32K x 8) Static RAM

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CY7C199D
256-Kbit (32K × 8) Static RAM
256-Kbit (32K × 8) Static RAM
Features
Temperature range
–40 °C to 85 °C
Pin and function compatible with CY7C199C
High speed
tAA = 10 ns
Low active power
ICC = 80 mA at 10 ns
Low CMOS standby power
ISB2 = 3 mA
2.0 V data retention
Automatic power-down when deselected
Complementary metal oxide semiconductor (CMOS) for
optimum speed/power
Transistor-transistor logic (TTL) compatible inputs and outputs
Easy memory expansion with CE and OE features
Available in Pb-free 28-pin 300-Mil-wide molded small outline
J-lead package (SOJ) and 28-pin thin small outline package
(TSOP) I packages
Functional Description
The CY7C199D is a high performance CMOS static RAM
organized as 32,768 words by 8-bits. Easy memory expansion is
provided by an active LOW chip enable (CE), an active LOW
output enable (OE) and tri-state drivers. This device has an
automatic power-down feature, reducing the power consumption
when deselected. The input and output pins (I/O0 through I/O7)
are placed in a high impedance state when the device is
deselected (CE HIGH), the outputs are disabled (OE HIGH), or
during a write operation (CE LOW and WE LOW).
Write to the device by taking chip enable (CE) and write enable
(WE) inputs LOW. Data on the eight I/O pins (I/O0 through I/O7)
is then written into the location specified on the address pins (A0
through A14).
Read from the device by taking chip enable (CE) and output
enable (OE) LOW while forcing write enable (WE) HIGH. Under
these conditions, the contents of the memory location specified
by the address pins appears on the I/O pins.
The CY7C199D device is suitable for interfacing with processors
that have TTL I/P levels. It is not suitable for processors that
require CMOS I/P levels. Please see Electrical Characteristics
on page 4 for more details and suggested alternatives.
For a complete list of related documentation, click here.
Logic Block Diagram
I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 38-05471 Rev. *N
• San Jose, CA 95134-1709 • 408-943-2600
Revised March 22, 2019


Cypress Semiconductor Electronic Components Datasheet

CY7C199D Datasheet

256K (32K x 8) Static RAM

No Preview Available !

CY7C199D
Contents
Pin Configurations ........................................................... 3
Selection Guide ................................................................ 3
Maximum Ratings ............................................................. 4
Operating Range ............................................................... 4
Electrical Characteristics ................................................. 4
Capacitance ...................................................................... 5
Thermal Resistance .......................................................... 5
AC Test Loads and Waveforms ....................................... 5
Data Retention Characteristics ....................................... 6
Data Retention Waveform ................................................ 6
Switching Characteristics ................................................ 7
Switching Waveforms ...................................................... 8
Truth Table ...................................................................... 10
Ordering Information ...................................................... 10
Ordering Code Definitions ......................................... 10
Package Diagrams .......................................................... 11
Acronyms ........................................................................ 13
Document Conventions ................................................. 13
Units of Measure ....................................................... 13
Document History Page ................................................. 14
Sales, Solutions, and Legal Information ...................... 16
Worldwide Sales and Design Support ....................... 16
Products .................................................................... 16
PSoC® Solutions ...................................................... 16
Cypress Developer Community ................................. 16
Technical Support ..................................................... 16
Document Number: 38-05471 Rev. *N
Page 2 of 16


Part Number CY7C199D
Description 256K (32K x 8) Static RAM
Maker Cypress Semiconductor
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CY7C199D Datasheet PDF






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