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參數(shù)資料
| 型號： | BTF1A |
| 英文描述： | Dual Differential Transceiver BTF1A With Idle Bus Indicator |
| 中文描述： | 雙差分收發(fā)器BTF1A有空閑巴士指標 |
| 文件頁數(shù)： | 3/16頁 |
| 文件大小： | 252K |
| 代理商： | BTF1A |
Agere Systems Inc.
3
Data Sheet
March 2001
With Idle Bus Indicator
Dual Differential Transceiver BTF1A
Electrical Characteristics
For variations in electrical characteristics over the temperature range, see Figure 10 through Figure 12.
Table 3. Power Supply Current Characteristics
T
A
=
40 °C to +125 °C, V
CC
= 5 V
±
0.25 V.
Third State
The BTF1A driver produces pseudo-ECL levels, and has a third-state mode, which is different than a conventional
TTL device. When a driver is placed in the third state, the base of the output transistors are pulled low, bringing the
outputs below the active-low level. The BTF1A is unique because it provides a logic zero at its output when in the
third state. If all the buffers on the bus are in the third state, the BTF1A is designed to deliver a logic zero to the bus
to act as an indicator that the bus is idle. The guaranteed zero level, Vdo – Vdo, is 0.4 V.
Parameter
Symbol
Min
Typ
Unit
Power Supply Current (V
CC
= 5.5 V)
All Outputs Disabled
All Outputs Enabled
I
CC
I
CC
—
—
40
20
65
35
mA
mA
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