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參數(shù)資料
| 型號： | CB55000 |
| 英文描述： | HCMOS7 STANDARD CELLS |
| 中文描述： | HCMOS7標準單元 |
| 文件頁數(shù)： | 13/15頁 |
| 文件大小： | 2533K |
| 代理商： | CB55000 |
13/15
CB55000 Series
Table 8. Pull-Up and Pull-Down Characteristics
8.1 2.5 V Buffer Specifications
The buffers are called “CMOS” buffers. The nominal supply voltage is 2.25 V < V
dd
< 2.75 V. However, the
specifications shown in are still valid for lower voltages.
Table 9. Low Voltage CMOS DC Input Specifications
2.5 V output buffers will be offered with passive slew rate control and process-compensated slew rate control.
In both cases, the typical output current is that shown in Table 10.
Table 10. Slew Rate Versus Drive
Symbol
Parameter
Conditions
Min.
Type
Max
Unit
I
pu
Pull-up current
V
i
= 0 V
-50
μ
A
I
pd
Pull-down current
V
i
= V
dd1
1)
V
i
= V
dd3
for 3.3 V buffer
50
μ
A
R
pu
Equivalent pull-up resistance
V
i
= 0 V
50
k
R
pu
Equivalent pull-down
resistance
V
i
= V
dd1
50
k
Symbol
Parameter
Conditions
Min.
Type
Max
Unit
V
il
Low level threshold
(input falling)
No Schmitt
0.5*V
dd
V
V
ih
High level threshold
(input rising)
No Schmitt
0.5*V
dd
V
V
il
Low level input voltage
Schmitt input
0.26*V
dd
V
V
ih
High level input voltage
Schmitt input
0.7*V
dd
V
V
hyst
Schmitt trigger hysteresis
Schmitt input
0.23*V
dd
V
V
ol
Low level output voltage
1
1)
2)
Takes into account 0.075*V
dd
voltage drop in both supply lines.
“X” is the source/sink current under worst case conditions and is reflected in the name of the I/O cell according to the drive
capability.
I
ol
= X mA
2
0.15*V
dd
V
V
oh
High level output voltage
(1)
I
oh
= -X mA
2
0.85*V
dd
V
Drive (mA):
2
4
8
Slew Rate
(mA/ns Typical)
8
16
32
Active Slew Rate
(mA/ns Typical)
8
16
32
Typical peak current
(mA)
25
50
100
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