BTM1A Agere Systems, BTM1A Datasheet

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BTM1A

Manufacturer Part Number
BTM1A
Description
Dual Differential Transceivers--BTK1A And BTM1A
Manufacturer
Agere Systems
Datasheet
Features
Driver Features
Receiver Features
Common Device Features
Dual Differential Transceivers
BTK1A and BTM1A
Two line drivers per package
Logic to convert TTL input logic levels to
differential, pseudo-emitter coupled logic (ECL)
output logic levels
No line loading when V
High output driver for 50
200 mA short-circuit current (typical)
2.0 ns maximum propagation delay
<0.2 ns output skew (typical)
Two line receivers per package
High input impedance
Logic that converts differential input logic levels to
transistor-transistor logic (TTL) output logic levels
4.0 ns maximum propagation delay
<0.20 V input sensitivity (typical)
Common enable for each driver/receiver pair
Operating temperature range: –40 C to +125 C
(wider than the 41 Series)
Single 5.0 V
400 Mbits/s maximum data rate
Meets enhanced small device interface (ESDI)
standards
Electrostatic discharge (ESD) performance better
than the 41 Series
Lower power requirement than the 41 Series
1.2 V to 7.2 V common-mode range
10% supply
CC
8 k
= 0 V
loads
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 ) and
receiver inputs (110 ), eliminating the need for
external resistors on the circuit board when used with
100
transceivers replace the Agere 41 Series
transceivers.
The powerdown loading characteristics of the
receiver input circuit are approximately 8 k
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.
impedance, twisted-pair (or flat) cable. These
October 2001
Data Sheet
relative

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BTM1A Summary of contents

Page 1

... Electrostatic discharge (ESD) performance better than the 41 Series 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 ...

Page 2

... BTK1A and BTM1A Pin Information RO1 1 DI1 GND 6 DI2 7 RO2 8 Figure 1. Differential Transceiver Logic Diagrams Table 1. Enable Truth Table Absolute Maximum Ratings Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only ...

Page 3

... In the typical case, the difference voltage can be as much without significantly affecting the amplitude of the driving signal. Agere Systems Inc. 0.5 V. Symbol Min BTK1A and BTM1A Typ Max Unit 115 ...

Page 4

... BTK1A and BTM1A Electrical Characteristics Table 4. Driver Voltage and Current Characteristics For variations in output voltage over the temperature range, see Figure 10 and Figure 11. T Parameter Output Voltages: Low* High*: Differential Voltage (V – Third State –1.0 mA Output Voltages ( ° °C): ...

Page 5

... High 7 Differential Input Impedance (BTM1A): Connected Between RI and RI * The input levels and difference voltage provide zero noise immunity and should be tested only in a static, noise-free environment. † Outputs of unused receivers assume a logic 1 level when the inputs are left open. (It is recommended that all unused positive inputs be tied to the positive power supply. No external series resistor is required.) ‡ ...

Page 6

... BTK1A and BTM1A Timing Characteristics Table 6. Driver Timing Characteristics (See Figure 3 and Figure 4.) For t and t propagation delays over the temperature range, see Figure 13. Propagation delay test circuit P1 P2 connected to output is shown in Figure 7. T Parameter Propagation Delay: † Input High to Output † ...

Page 7

... PLH 100 125 LOAD CAPACITANCE PLL t PLH 80% t tLH Figure 3. Driver Propagation Delay Timing BTK1A and BTM1A (TYP) PHL 150 175 200 (pF) L 2.4 V 1 ...

Page 8

... BTK1A and BTM1A Timing Characteristics (continued PHZ OUTPUT OUTPUT t PLZ Note: In the third state, both outputs (i.e., OUTPUT and OUTPUT) are 0.1 V below the low state. INPUT INPUT OUTPUT Figure 5. Receiver Propagation Delay Timing 8 t PZH t PZL Figure 4. Driver Enable and Disable Timing ...

Page 9

... Agere Systems Inc. t PZH OUTPUT OF DEVICE UNDER DO * Includes probe and jig capacitances. 200 Note: All 458E, IN4148, or equivalent diodes. Figure 8. Receiver Propagation Delay Test Circuit 12-2271.a(F) DO 12-2271.b(F) BTK1A and BTM1A t t PLZ PZL TEST pF 1.3 V ...

Page 10

... BTK1A and BTM1A Output Characteristics Figure 9 illustrates typical driver output characteristics. Included are load lines for two typical termination configurations. OUTPUT VOLTAGE (V) V – – Output Current vs. Output Voltage for Loads Shown in B and Load ...

Page 11

... Figure 14. Propagation Delay for a High Output Versus OL 4.00 3.50 P2 3.00 2.50 2.00 1.50 1.00 –50 75 100 125 150 12-3469.a(F) Propagation P2 Figure 15. Propagation Delay for a Low Output BTK1A and BTM1A MAX TYP MIN – 100 TEMPERATURE ( Versus Temperature at V PLH CC for the Receivers MAX TYP MIN – ...

Page 12

... BTK1A and BTM1A Handling Precautions CAUTION: This device is susceptible to damage as a result of electrostatic discharge. Take proper precautions during both handling and testing. Follow guidelines such as JEDEC Publication No. 108-A (Dec. 1988). When handling and mounting line driver products, proper precautions should be taken to avoid exposure to electrostatic discharge (ESD) ...

Page 13

... Based on the results in Table 10, the data transmission receivers pass the Agere latch-up testing requirements and are considered not susceptible to latch-up. Agere Systems Inc. dc Current Stress Power Supply of I/O Pins Slew Rate 150 mA 1 µs 250 mA 100 ns BTK1A and BTM1A Power Supply Overvoltage 1.75 x Vmax 2.25 x Vmax 13 ...

Page 14

... BTK1A and BTM1A Outline Diagrams 16-Pin DIP Dimensions are in millimeters PIN #1 IDENTIFIER ZONE 2.54 TYP Package Number of Description Pins (N) PDIP3 (Plastic 16 Dual-In-Line Package) Note: The dimensions in this outline diagram are intended for informational purposes only. For detailed schematics to assist your design efforts, please contact your Agere Sales Representative ...

Page 15

... Note: The dimensions in this outline diagram are intended for informational purposes only. For detailed schematics to assist your design efforts, please contact your Agere Sales Representative. Agere Systems Inc SEATING PLANE 0.10 0.51 MAX 0.28 MAX Package Dimensions Maximum Length Maximum Width (L) Without Leads (B) 10.11 4.01 10.49 7.62 BTK1A and BTM1A W 0.61 5-4414(F) Maximum Width Maximum Height Including Leads Above Board (W) (H) 6.17 1.73 10.64 2.67 15 ...

Page 16

... BTK1A and BTM1A Outline Diagrams (continued) 16-Pin SOIC (SOJ) Dimensions are in millimeters PIN #1 IDENTIFIER ZONE 1.27 TYP Package Number of Description Pins (N) SOJ (Small- 16 Outline, J-Lead) Note: The dimensions in this outline diagram are intended for informational purposes only. For detailed schematics to assist your design efforts, please contact your Agere Sales Representative ...

Page 17

... Multiplying I times V provides an estimate internal power dissipation. Agere Systems Inc. BTK1A and BTM1A The power dissipated in the output is a function of the: Termination scheme on the outputs Termination resistors Duty cycle of the output Package thermal impedance depends on: Airflow Package type (e.g., DIP, SOIC, SOIC/NB) ...

Page 18

... BTK1A and BTM1A Ordering Information Part Number Driver Termination* BTK1A16E None BTK1A16E-TR None BTK1A16G None BTK1A16G-TR None BTK1A16NB None BTK1A16NB-TR None BTK1A16P None BTM1A16E 220 BTM1A16E-TR 220 BTM1A16G 220 BTM1A16G-TR 220 BTM1A16NB 220 BTM1A16NB-TR 220 BTM1A16P 220 * Indicates on-chip output terminating resistors from each driver output to ground. ...

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