DataSheet39.com

What is CG6257AM?

This electronic component, produced by the manufacturer "Weida Semiconductor", performs the same function as "4Mb (256K x 16) Pseudo Static RAM".


CG6257AM Datasheet PDF - Weida Semiconductor

Part Number CG6257AM
Description 4Mb (256K x 16) Pseudo Static RAM
Manufacturers Weida Semiconductor 
Logo Weida Semiconductor Logo 


There is a preview and CG6257AM download ( pdf file ) link at the bottom of this page.





Total 12 Pages



Preview 1 page

No Preview Available ! CG6257AM datasheet, circuit

PRELIMINARY
CG6257AM
4Mb (256K x 16) Pseudo Static RAM
Features
• Wide voltage range: 2.70V–3.30V
• Access Time: 70ns
• Ultra-low active power
— Typical active current: 2.0mA @ f = 1 MHz
— Typical active current: 13mA @ f = fmax
• Ultra low standby power
• Automatic power-down when deselected
• CMOS for optimum speed/power
• Offered in a 48 Ball BGA Package
Functional Description[1]
The CG6257AM is a high-performance CMOS Pseudo static
RAM organized as 256K words by 16 bits that supports an
asynchronous memory interface. This device features
advanced circuit design to provide ultra-low active current.
This is ideal for providing More Battery Life® (MoBL) in
portable applications such as cellular telephones. The device
can be put into standby mode reducing power consumption by
more than 99% The device can also be put into standby mode
when deselected (CE HIGH or both BHE and BLE are HIGH).
The input/output pins (I/O0 through I/O15) are placed in a
high-impedance state when: deselected (CE HIGH ), outputs
are disabled (OE HIGH), both Byte High Enable and Byte Low
Enable are disabled (BHE, BLE HIGH), or during a write
operation (CE LOW and WE LOW). The addresses must not
be toggled once the read is started on the device.
Writing to the device is accomplished by taking Chip Enables
(CE LOW ) and Write Enable (WE) input LOW. If Byte Low
Enable (BLE) is LOW, then data from I/O pins (I/O0 through
I/O7), is written into the location specified on the address pins
(A0 through A17). If Byte High Enable (BHE) is LOW, then data
from I/O pins (I/O8 through I/O15) is written into the location
specified on the address pins (A0 through A17).
Reading from the device is accomplished by taking Chip
Enables (CE LOW) and Output Enable (OE) LOW while
forcing the Write Enable (WE) HIGH. If Byte Low Enable (BLE)
is LOW, then data from the memory location specified by the
address pins will appear on I/O0 to I/O7. If Byte High Enable
(BHE) is LOW, then data from memory will appear on I/O8 to
I/O15. See the truth table at the back of this datasheet for a
complete description of read and write modes
Logic Block Diagram
www.DataSheet4U.com
A10
A9
A
A
8
7
A6
A5
A4
A3
A2
A
A
1
0
DATA IN DRIVERS
256K × 16
RAM Array
I/O0 – I/O7
I/O8 – I/O15
COLUMN DECODER
Power- Down
Circuit
BHE
BLE
BHE
WE
OE
BLE
CE
CE
Note:
1. For best-practice recommendations, please refer to the Cypress application note “System Design Guidelines” on http://www.cypress.com.
Weida Semiconductor, Inc.
38-XXXXX
Revised August 2003

line_dark_gray
CG6257AM equivalent
PRELIMINARY
CG6257AM
AC Test Loads and Waveforms
VCC
OUTPUT
R1
50 pF
INCLUDING
JIG AND
SCOPE
R2
VCC
10%
GND
Rise Time = 1 V/ns
ALL INPUT PULSES
90%
90%
10%
Fall Time = 1 V/ns
Equivalento:
THÉVENINEQUIVALENT
OUTPUT
RTH
V
Parameters
R1
R2
RTH
VTH
3.0V VCC
1179
1941
733
1.87
Unit
V
www.DataSheet4U.com
38-XXXXX
Page - 5 - of 12


line_dark_gray

Preview 5 Page


Part Details

On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for CG6257AM electronic component.


Information Total 12 Pages
Link URL [ Copy URL to Clipboard ]
Download [ CG6257AM.PDF Datasheet ]

Share Link :

Electronic Components Distributor


An electronic components distributor is a company that sources, stocks, and sells electronic components to manufacturers, engineers, and hobbyists.


SparkFun Electronics Allied Electronics DigiKey Electronics Arrow Electronics
Mouser Electronics Adafruit Newark Chip One Stop


Featured Datasheets

Part NumberDescriptionMFRS
CG6257AMThe function is 4Mb (256K x 16) Pseudo Static RAM. Weida SemiconductorWeida Semiconductor

Semiconductors commonly used in industry:

1N4148   |   BAW56   |   1N5400   |   NE555   |  

LM324   |   BC327   |   IRF840  |   2N3904   |  



Quick jump to:

CG62     1N4     2N2     2SA     2SC     74H     BC     HCF     IRF     KA    

LA     LM     MC     NE     ST     STK     TDA     TL     UA    



Privacy Policy   |    Contact Us     |    New    |    Search