MX66C256 Просмотр технического описания (PDF) - Macronix International
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MX66C256 Datasheet PDF : 9 Pages
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MX66C256
PIN DESCRIPTIONS
A0-A14 Address Input
CE Chip Enable Input
WE Write Enable Input
OE Output Enable Input
DQ0 - DQ7 Data Input/Output Ports
Vcc
GND
These 15 address input select one of the 32768 x 8-bit words
in the RAM
CE is active LOW . Chip enable must be active to read from
or write to the device. If chip enable is not active, the device
is deselected and is in a standby power mode. The DQ pins will
be in the high impedance state when the device is deselected.
The write enable input is active LOW and controls read and
write operations. With the chip selected, when WE is HIGH
and OE is LOW, output data will be present on the DQ pins;
when WE is LOW, the data present on the DQ pins will be
written into the selected memory location.
The output enable input is active LOW. If the output enable
is active while the chip is selected and the write enable is
inactive, data will be present on the DQ pins and they will
be enabled. The DQ pins will be in the high impedance
state when OE is inactive.
These 8 bi-directional ports are used to read data from or
write data into the RAM.
Power Supply
Ground
TRUTH TABLE
MODE
WE
CE
OE
I/O Operation
Vcc Current
Not Selected
X
H
X
High Z
, ICCSB ICCSB1
Output Disabled
H
L
H
High Z
ICC
Read
H
L
L
DOUT
ICC
Write
L
L
X
DIN
ICC
ABSOLUTE MAXIMUM RATINGS(1)
SYMBOL PARAMETER
RATING UNITS
VTERM Terminal Voltage with -0.5 to +7.0
V
Respect to GND
TBIAS
Temperature Under Bias -40 to +125
OC
TSTG
Storage Temperature -60 to +150
OC
PT
Power Dissipation
1.0
W
IOUT
DC Output Current
20
mA
1. Stresses greater than those listed under ABSOLUTE MAXIMUM
RATINGS may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at these or
any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect reliability.
OPERATING RANGE
RANGE AMBIEN TEMPERATURE Vcc
COMMERCIAL
INDUSTRIAL
0O C to + 70O C
-40O C to + 85O C
4.5 ~ 5.5V
4.5 ~ 5.5V
CAPACITANCE(1) (TA = 25O C, f = 1.0 MHz)
SYMBOL PARAMETER CONDITIONS MAX. UNIT
CIN
Input Capacitance VIN = 0V
6
pF
CDQ
Input/Output
VI/O = 0V
8
pF
Capacitance
1. This parameter is guaranteed and not tested.
P/N DS0035
2
Macronix America Inc. USA 1338 Ridder Park Dr., San Jose, CA 95131
Tel (408)453-8088 Fax (408)451-0876 www.macronix.com
Rev. 1.1, Jan., 2000
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