BTK1A Datasheet
Dual Differential Transceivers
Download: BTK1A Datasheet 
BTK1A
Dual Differential Transceivers
Data Sheet October 2001
Dual Differential Transceivers BTK1A and BTM1A
FEATURES
Driver
FEATURES
Two line drivers per package s Logic to convert TTL input logic levels to
Differential, Pseudo-emitter Coupled Logic (ecl) Output Logic Levels S No Line Loading When Vcc = 0
V S High Output Driver For 50 Loads S 200 Ma Short-circuit Current (typical) S 2.0 Ns Maximum
propagation delay s
Receiver
FEATURES
Two Line Receivers Per Package S High Input Impedance 8 K S Logic That Converts Differential
input logic levels to
Transistor-transistor Logic (ttl) Output Logic Levels S 4.0 Ns Maximum Propagation Delay S
Common Device
FEATURES
Common Enable For Each Driver/receiver Pair S Operating Temperature Range: -40 C To +125 C
(wider Than The 41 Series) S Single 5.0 V 10% Supply S 400 Mbits/s Maximum Data Rate S Meets
enhanced small device interface (ESDI)
standards s Electrostatic discharge (ESD) performance better
than the 41 Series s 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 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 ) And Receiver
Inputs (110 ), Eliminating The Need For External Resistors On The Circuit Board When Used With
100 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 K
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.
Dual Differential Transceivers BTK1A and BTM1A
Pin Information
Data Sheet October 2001
RO1 1 DI1 2 VCC 3 ED 4 ER 5
GND 6 DI2 7
R1 D1 D2
R2 BTK1A
16 RI1 15 RI1 14 DO1 13 DO1 12 DO2 11 DO2 10 RI2 9 RI2
RO1 1 DI1 2 VCC 3 ED 4 ER 5
GND 6 DI2 7
R1 D1 D2
R2 BTM1A