參數(shù)資料
型號: M27V256-100B6TR
廠商: 意法半導(dǎo)體
英文描述: 256 Kbit 32Kb x 8 Low Voltage UV EPROM and OTP EPROM
中文描述: 256千位的32KB × 8低壓紫外線可擦寫可編程只讀存儲器和OTP存儲器
文件頁數(shù): 10/15頁
文件大?。?/td> 103K
代理商: M27V256-100B6TR
M27V256
4/15
Two Line Output Control
Because EPROMs are usually used in larger
memory arrays, this product features a 2 line con-
trol function which accommodates the use of mul-
tiple memory connection. The two line control
function allows:
a. the lowest possible memory power dissipation,
b. complete assurance that output bus contention
will not occur.
For the most efficient use of these two control
lines, E should be decoded and used as the prima-
ry device selecting function, while G should be
made a common connection to all devices in the
array and connected to the READ line from the
system control bus. This ensures that all deselect-
ed memory devices are in their low power standby
mode and hat the output pins are only active when
data is desired from a particular memory device.
System Considerations
The power switching characteristics of Advance
CMOS EPROMs require careful decoupling of the
devices. The supply current, ICC, has three seg-
ments that are of interest to the system designer:
the standby current level, the active current level,
and transient current peaks that are produced by
the falling and rising edges of E. The magnitude of
this transient current peaks is dependent on the
capacitive and inductive loading of the device at
the output.
Table 5. AC Measurement Conditions
High Speed
Standard
Input Rise and Fall Times
≤ 10ns
≤ 20ns
Input Pulse Voltages
0 to 3V
0.4V to 2.4V
Input and Output Timing Ref. Voltages
1.5V
0.8V and 2V
Figure 3. AC Testing Input Output Waveform
AI01822
3V
High Speed
0V
1.5V
2.4V
Standard
0.4V
2.0V
0.8V
Figure 4. AC Testing Load Circuit
AI01823B
1.3V
OUT
CL
CL = 30pF for High Speed
CL = 100pF for Standard
CL includes JIG capacitance
3.3k
1N914
DEVICE
UNDER
TEST
Table 6. Capacitance (1) (TA =25 °C, f = 1 MHz)
Note: Sampled only, not 100% tested.
Symbol
Parameter
Test Condit ion
Min
Max
Unit
CIN
Input Capacitance
VIN =0V
6pF
COUT
Output Capacitance
VOUT =0V
12
pF
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