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參數資料
| 型號： | 27L256-12 |
| 廠商： | Macronix International Co., Ltd. |
| 英文描述： | 256K-BIT [32Kx8] LOW VOLTAGE OPERATION CMOS EPROM |
| 中文描述： | 256K比特[32Kx8]低電壓工作的CMOS存儲器 |
| 文件頁數： | 3/14頁 |
| 文件大?。?/td> | 769K |
| 代理商： | 27L256-12 |
3
P/N:PM0248
REV.3.6, AUG. 26, 2003
MX27L256
TWO-LINE OUTPUT CONTROL FUNCTION
To accommodate multiple memory connections, a two-
line control function is provided to allow for:
1. Low memory power dissipation,
2. Assurance that output bus contention will not
occur.
It is recommended that CE be decoded and used as the
primary device-selecting function, while OE be made a
common connection to all devices in the array and
connected to the READ line from the system control bus.
This assures that all deselected memory devices are in
their low-power standby mode and that the output pins
are only active when data is desired from a particular
memory device.
SYSTEM CONSIDERATIONS
During the switch between active and standby
conditions, transient current peaks are produced on the
rising and falling edges of Chip Enable. The magnitude
of these transient current peaks is dependent on the
output capacitance loading of the device. At a minimum,
a 0.1 uF ceramic capacitor (high frequency, low inherent
inductance) should be used on each device between
VCC and GND to minimize transient effects. In addition,
to overcome the voltage drop caused by the inductive
effects of the printed circuit board traces on EPROM
arrays, a 4.7 uF bulk electrolytic capacitor should be
used between Vcc and GND for each eight devices. The
location of the capacitor should be close to where the
power supply is connected to the array.
MODE SELECT TABLE
PINS
MODE
CE
OE
A0
A9
VPP
OUTPUTS
Read
VIL
VIL
X
X
VCC
DOUT
Output Disable
VIL
VIH
X
X
VCC
High Z
Standby (TTL)
VIH
X
X
X
VCC
High Z
Standby (CMOS)
VCC
±
0.3V
X
X
X
VCC
High Z
Program
VIL
VIH
X
X
VPP
DIN
Program Verify
VIH
VIL
X
X
VPP
DOUT
Program Inhibit
VIH
VIH
X
X
VPP
High Z
Manufacturer Code(3)
VIL
VIL
VIL
VH
VCC
C2H
Device Code(3)
VIL
VIL
VIH
VH
VCC
10H
4. See DC Programming characteristics for VPP voltage during
programming.
NOTES:
1. VH = 12.0 V
±
0.5 V
2. X = Either VIH or VIL
3. A1 - A8 = A10 - A14 = VIL(For auto select)
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相關代理商/技術參數 |
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|---|---|
| 27L256-15 | 制造商:MCNIX 制造商全稱:Macronix International 功能描述:256K-BIT [32Kx8] LOW VOLTAGE OPERATION CMOS EPROM |
| 27L256-20 | 制造商:MCNIX 制造商全稱:Macronix International 功能描述:256K-BIT [32Kx8] LOW VOLTAGE OPERATION CMOS EPROM |
| 27L256-25 | 制造商:MCNIX 制造商全稱:Macronix International 功能描述:256K-BIT [32Kx8] LOW VOLTAGE OPERATION CMOS EPROM |
| 27L278RC | 制造商:Genteq 功能描述:OIL FILLED CAPACITOR |
| 27L2AI | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LinCMOSE PRECISION DUAL OPERATIONAL AMPLIFIERS |
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