BTF1A16G-TR 参数 Datasheet PDF下载

Data Sheet

March 2001

Dual Differential Transceiver BTF1A

With Idle Bus Indicator

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.

Parameter

Power Supply Current (V

CC

= 5.5 V)

All Outputs Disabled

All Outputs Enabled

Symbol

I

CC

I

CC

Min

—

—

Typ

40

20

Max

65

35

Unit

mA

mA

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.

Agere Systems Inc.

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