BTK1A
器件描述：Dual Differential Transceivers BTK1A and BTM1A
器件厂商：AGERE [Agere Systems]
文件大小：301.06KB，共18页
Sponsor by e络盟器件资料摘要：
Data Sheet
October 2001
Dual Differential Transceivers
BTK1A and BTM1A
Features
Driver Features
a73 Two line drivers per package
a73 Logic to convert TTL input logic levels to
differential, pseudo-emitter coupled logic (ECL)
output logic levels
a73 No line loading when VCC = 0 V
a73 High output driver for 50 Ω loads
a73 200 mA short-circuit current (typical)
a73 2.0 ns maximum propagation delay
a73 <0.2 ns output skew (typical)
Receiver Features
a73 Two line receivers per package
a73 High input impedance ≅ 8 kΩ
a73 Logic that converts differential input logic levels to
transistor-transistor logic (TTL) output logic levels
a73 4.0 ns maximum propagation delay
a73 <0.20 V input sensitivity (typical)
a73 −1.2 V to +7.2 V common-mode range
Common Device Features
a73 Common enable for each driver/receiver pair
a73 Operating temperature range: –40 °C to +125 °C
(wider than the 41 Series)
a73 Single 5.0 V ± 10% supply
a73 400 Mbits/s maximum data rate
a73 Meets enhanced small device interface (ESDI)
standards
a73 Electrostatic discharge (ESD) performance better
than the 41 Series
a73 Lower power requirement than the 41 Series
Description
The BTK1A and BTM1A devices are dual differential
transceiver circuits that transmit and receive digital
data over balanced transmission lines and are
compatible with Agere Systems Inc. quad differential
drivers and receivers. The dual drivers translate input
TTL logic levels to differential pseudo-ECL output
levels. The dual receivers convert differential input
logic levels to TTL output levels. Each driver/receiver
pair has its own common enable control allowing
serial data and a control clock to be transmitted and
received on a single integrated circuit. The BTK1A
transceiver requires the customer to supply
termination resistors on the circuit board. The
BTM1A transceiver has an internal resistor
termination for both the driver outputs (220 Ω) and
receiver inputs (110 Ω), eliminating the need for
external resistors on the circuit board when used with
100 Ω impedance, twisted-pair (or flat) cable. These
transceivers replace the Agere 41 Series
transceivers.
The powerdown loading characteristics of the
receiver input circuit are approximately 8 kΩ relative
to the power supplies; hence, they will not load the
transmission line when the circuit is powered down.
For those circuits with termination resistors, the line
will remain impedance matched when the circuit is
powered down. The driver does not load the line
when it is powered down.
The packaging options that are available for the
dual differential transceivers include a 16-pin DIP; a
16-pin, J-lead SOJ; a 16-pin, gull-wing SOIC; and a
16-pin, narrow-body, gull-wing SOIC.
October 2001
Dual Differential Transceivers
BTK1A and BTM1A
Features
Driver Features
a73 Two line drivers per package
a73 Logic to convert TTL input logic levels to
differential, pseudo-emitter coupled logic (ECL)
output logic levels
a73 No line loading when VCC = 0 V
a73 High output driver for 50 Ω loads
a73 200 mA short-circuit current (typical)
a73 2.0 ns maximum propagation delay
a73 <0.2 ns output skew (typical)
Receiver Features
a73 Two line receivers per package
a73 High input impedance ≅ 8 kΩ
a73 Logic that converts differential input logic levels to
transistor-transistor logic (TTL) output logic levels
a73 4.0 ns maximum propagation delay
a73 <0.20 V input sensitivity (typical)
a73 −1.2 V to +7.2 V common-mode range
Common Device Features
a73 Common enable for each driver/receiver pair
a73 Operating temperature range: –40 °C to +125 °C
(wider than the 41 Series)
a73 Single 5.0 V ± 10% supply
a73 400 Mbits/s maximum data rate
a73 Meets enhanced small device interface (ESDI)
standards
a73 Electrostatic discharge (ESD) performance better
than the 41 Series
a73 Lower power requirement than the 41 Series
Description
The BTK1A and BTM1A devices are dual differential
transceiver circuits that transmit and receive digital
data over balanced transmission lines and are
compatible with Agere Systems Inc. quad differential
drivers and receivers. The dual drivers translate input
TTL logic levels to differential pseudo-ECL output
levels. The dual receivers convert differential input
logic levels to TTL output levels. Each driver/receiver
pair has its own common enable control allowing
serial data and a control clock to be transmitted and
received on a single integrated circuit. The BTK1A
transceiver requires the customer to supply
termination resistors on the circuit board. The
BTM1A transceiver has an internal resistor
termination for both the driver outputs (220 Ω) and
receiver inputs (110 Ω), eliminating the need for
external resistors on the circuit board when used with
100 Ω impedance, twisted-pair (or flat) cable. These
transceivers replace the Agere 41 Series
transceivers.
The powerdown loading characteristics of the
receiver input circuit are approximately 8 kΩ relative
to the power supplies; hence, they will not load the
transmission line when the circuit is powered down.
For those circuits with termination resistors, the line
will remain impedance matched when the circuit is
powered down. The driver does not load the line
when it is powered down.
The packaging options that are available for the
dual differential transceivers include a 16-pin DIP; a
16-pin, J-lead SOJ; a 16-pin, gull-wing SOIC; and a
16-pin, narrow-body, gull-wing SOIC.