Datasheet SN75LBC776DB, SN75LBC776DW, SN75LBC776DWR Datasheet (Texas Instruments)

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SN75LBC776

SINGLE-CHIP GeoPort TRANSCEIVER

SLLS221A – NOVEMBER 1995 – REVISED JANUARY 1996

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Single-Chip Interface Solution for the 9-terminal GeoPort Host (DTE)

Designed to Operate up to 4 Mbit/s Full Duplex

Single 5-V Supply Operation

6-kV ESD Protection on All Terminals

Backward compatible With AppleTalk and LocalTalk

Combines Multiple Components into a Single-chip Solution

Complements the SN75LBC777 9-Terminal GeoPort Peripheral (DCE) Interface Device

LinBiCMOS Process Technology

description

The SN75LBC776 is a low-power LinBiCMOS device that incorporates the drivers and receivers for a 9-pin GeoPort host interface. GeoPort combines hybrid EIA/TIA-422-B and EIA/TIA-423-B drivers and receivers to transmit data up to four megabits per second (Mbit/s) full duplex. GeoPort is a serial communications standard that is intended to replace the RS-232, Appletalk, and LocalTalk printer ports all in one connector in addition to providing real-time data transfer capability. It provides point-to-point connections between GeoPort-compatible devices with data transmission rates up to 4 Mbit/s full duplex and a hot-plug feature. Applications include connection to telephony, integrated services digital network (ISDN), digital sound and imaging, fax-data modems, and other serial and parallel connections. The GeoPort is backwardly compatible to both LocalTalk and AppleTalk.

While the SN75LBC776 is powered-off (V

= 0) the outputs are in a high-impedance state. When the shutdown (SHDN) terminal is high, the charge pump is powered down and the outputs are in a high-impedance state. The driver enable (DEN

) terminal sends the outputs of the differential driver into a high-impedance state with a high input signal. All drivers and receivers have fail-safe mechanisms to ensure a high output state when the inputs are left open.

A switched-capacitor voltage converter generates the negative voltage required from a single 5-V supply using four 0.1-µF capacitors, two capacitors between the C+ and C- terminals and two capacitors between V

and

ground. The SN75LBC776 is characterized for operation over the 0°C to 70°C temperature range.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

1 2 3 4 5 6 7 8 9 10

20 19 18 17 16 15 14 13 12 11

DA1

C– C+

SHDN

DZ2 DY2

GND

DEN

DA2

GND V

DY1 RY3 RB3 RA2 RY2 RB1 RA1 RY1

DW PACKAGE

(TOP VIEW)

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

GeoPort, LocalTalk, and AppleTalk are trademarks of Apple Computer, Incorporated. LinBiCMOS is a trademark of Texas Instruments Incorporated.

SN75LBC776 SINGLE-CHIP GeoPort TRANSCEIVER

SLLS221A – NOVEMBER 1995 – REVISED JANUARY 1996

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

DRIVER FUNCTION TABLE

†

INPUT INPUT ENABLE ENABLE OUTPUT

OUTPUT

DA1 DA2 SHDN DEN DY1

DY2 DZ2

H X L X L X X L X L X H X X X H L L X H L X L L L X L H

OPEN OPEN L L L H L

X X H X Z Z Z X X X H X Z Z X X OPEN OPEN Z Z Z

†

H = high level L = low level X = irrelevant ? = indeterminate Z = high impedance (off)

RECEIVER FUNCTION TABLE

†

INPUT

RA1 RB1

INPUT

RA2 & RB3

ENABLE

SHDN

OUTPUT

RY1

OUTPUT

RY2

OUTPUT

RY3

HL H L H H L LH L L L L H

OPEN OPEN L H H H

SHORT

‡

SHORT

‡

L ? ? ? XX X H Z Z Z XX X OPEN Z Z Z

†

H = high level L = low level X = irrelevant ? = indeterminate Z = high impedance (off)

‡

–0.2 V < VID < 0.2 V

function logic diagram (positive logic)

Charge

Pump

DY2 DZ2

RY1

DY1

RY2

RY3

VEE (–5 V)

DA2

DEN

RB1

RA1

DA1

RA2

RB3

SHDN

GND

12 13

19 20

7 6

SN75LBC776

SINGLE-CHIP GeoPort TRANSCEIVER

SLLS221A – NOVEMBER 1995 – REVISED JANUARY 1996

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

†

Positive supply voltage range, V

(see Note 1) –0.5 to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Negative supply voltage range, V

(see Note 1) –7 to 0.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Receiver input voltage range (RA, RB) –15 V to 15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Receiver differential input voltage range, V

–12 to 12 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Receiver output voltage range (RY) –0.5 V to 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Driver output voltage range (Power Off) (DY1

, DY2, DZ2) –15 V to 15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Driver output voltage range (Power On) (DY1

, DY2, DZ2) –11 V to 11 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Driver input voltage range (DA, SHND, DEN

) –0.5 V to V

CC+

0.4 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Continuous total power dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrostatic discharge (see Note 2): (Bus terminals), Class 3, A 6 kV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(Bus terminals), Class 3, B 500 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(All terminals), Class 3, A 6 kV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(All terminals), Class 3, B 500 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range, T

0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range, T

stg

–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

†

Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES: 1. All voltage values are with respect to network ground terminal unless otherwise noted.

2. This parameter is measured in accordance with MIL-STD-883C, Method 3015.7.

DISSIPATION RATING TABLE

PACKAGE

TA ≤ 25°C

POWER RATING

OPERATING FACTOR

ABOVE TA = 25°C

TA = 70°C

POWER RATING

DW 1125 mW 9.0 mW/°C 720 mW

SN75LBC776 SINGLE-CHIP GeoPort TRANSCEIVER

SLLS221A – NOVEMBER 1995 – REVISED JANUARY 1996

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

recommended operating conditions

MIN NOM MAX UNIT

Supply voltage, V

4.75 5 5.25 V High-level input voltage, VIHDA, SHDN, DEN 2 5.25 V Low-level input voltage, V

DA, SHDN, DEN 0.8 V

Receiver common-mode input voltage, V

–7 7 V

Receiver differential input voltage, V

–12 12 V Voltage-converter filter capacitance 0.2 µF Voltage-converter filter-capacitor equivalent series resistance (ESR) 0.2 Ω Operating free-air temperature, T

0 70 °C

driver electrical characteristics over operating free-air temperature range (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

RL = 12 kΩ 3.6 4.53 V

VOHHigh-level output voltage

Single ended,

RL = 120 Ω 2 3.63 V

See Figure 1

RL = 12 kΩ –4.53 –3.6 V

VOLLow-level output voltage

RL = 120 Ω –2.7 –1.8 V

|VOD|

Magnitude of differential output voltage |(V

(DY)

– V

(DZ)

= 120 Ω, See Figure 2

4 V

∆|VOD| Change in differential voltage magnitude

, g

250 mV

Common-mode output voltage –1 3 V

|∆V

OC(SS)

Magnitude of change, common-mode steady state output voltage

See Figure 3

200 mV

|∆V

OC(PP)

Magnitude of change, common-mode peak-to-peak output voltage

700 mV

SHDN = DEN = 0 V, No load 7 15 mA

ICCSupply current

SHDN = DEN = 5 V, No load 100 µA

High-impedance output current VO = –10 V to 10 V, VCC = 0 or 5 V ±100 µA

Short-circuit output current (see Note 3) VO = –5 V to 5 V ±170 ±450 mA

NOTE 3: Not more than one output should be shorted at one time.

SN75LBC776

SINGLE-CHIP GeoPort TRANSCEIVER

SLLS221A – NOVEMBER 1995 – REVISED JANUARY 1996

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

driver switching characteristics over operating free-air temperature range (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

PHL

Propagation delay time, high-to-low level output 42 75 ns

PLH

Propagation delay time, low-to-high level output 41 75 ns

PZL

Driver output enable time to low-level output 25 100 µs

PZH

Driver output enable time to high-level output

Single ended,

25 100 µs

PLZ

Driver output disable time from low-level output

SHDN

See Figure 4

28 100 ns

PHZ

Driver output disable time from high-level output 37 100 ns

Rise time 10 25 75 ns

Fall time 10 23 75 ns

PHL

Propagation delay time, high-to-low level output 40 75 ns

PLH

Propagation delay time, low-to-high level output 42 75 ns

SHDN 25 100 µs

PZL

Driver output enable time to low-level output

DEN 29 150 ns

SHDN 25 100 µs

PZH

Driver output enable time to high-level output

DEN

Differential,

35 150 ns

SHDN

See Figure 5

28 100 ns

PLZ

Driver output disable time from low-level output

DEN 34 100 ns

SHDN 37 100 ns

PHZ

Driver output disable time from high-level output

DEN 34 100 ns

Rise time 10 27 75 ns

Fall time 10 26 75 ns

SK(p)

Pulse skew, |t

PLH

– t

PHL

| 22 ns

receiver electrical characteristics over operating free-air temperature range (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

IT+

Positive-going input threshold voltage 200

IT–

Negative-going input threshold voltage

See Figure 6

–200

hys

Differential input voltage hysteresis (V

IT+

– V

IT–

) 50 mV

High-level output voltage (see Note 4) VIC = 0, IOH = –2 mA, See Figure 6 2 4.9 V

Low-level output voltage VIC = 0, IOL = 2 mA, See Figure 6 0.2 0.8 V

VO = 0 –85 –45

IOSShort-circuit output current

VO = V

47 +85

Input resistance

VCC = 0 or 5.25 V, VI = –12 V to 12 V

6 30 kΩ

NOTE 4: When the inputs are left unconnected, receivers one and two interpret these as high-level inputs and receiver three interprets these

as low-level inputs so that all outputs are at a high level.

SN75LBC776 SINGLE-CHIP GeoPort TRANSCEIVER

SLLS221A – NOVEMBER 1995 – REVISED JANUARY 1996

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

receiver switching characteristics over operating free-air temperature range (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

PHL

Propagation delay time, high-to-low-level output 31 75 ns

PLH

Propagation delay time, low-to-high level output

30 75 ns

Rise time

RL = 2 kΩ, CL = 15 pF,

15 30 ns

Fall time

See Figure 6

15 30 ns

SK(P)

Pulse skew |t

PLH–tPHL

| 20 ns

PZL

Receiver output enable time to low level output 35 100 ns

PZH

Receiver output enable time to high level output

Differential, C

=50 pF,

32 100 ns

PLZ

Receiver output disable time from low level output

See Figure 7

21 100 ns

PHZ

Receiver output disable time from high level output 21 100 ns

PZL

Receiver output enable time to low level output 12 25 µs

PZH

Receiver output enable time to high level output

Single ended, CL =50 pF,

12 25 µs

PLZ

Receiver output disable time from low level output

See Figure 7

25 100 ns

PHZ

Receiver output disable time from high level output 125 400 ns

SN75LBC776

SINGLE-CHIP GeoPort TRANSCEIVER

SLLS221A – NOVEMBER 1995 – REVISED JANUARY 1996

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

PARAMETER MEASUREMENT INFORMATION

DY1

DA1

SHDN

DY2

DZ2

SHDN

DA2

TEST CIRCUIT

NOTE A: CL = 50 pF

DEN

Figure 1. Single-Ended Driver DC Parameter Test

DY2

DZ2

DA2

60 Ω

50 pF

TEST CIRCUIT

SHDN

DEN

Figure 2. Differential Driver DC Parameter Test

DY2

DZ2

DA2

60 Ω

15 pF

TEST CIRCUIT (see Note A)

1.5 v

OC(PP)

OC(SS)

3 V

0 V

VOLTAGE WAVEFORM

SHDN

DEN

NOTE A: Measured 3dB bandwidth = 300 MHz

Figure 3. Differential-Driver Common-Mode Output Voltage Tests

SN75LBC776 SINGLE-CHIP GeoPort TRANSCEIVER

SLLS221A – NOVEMBER 1995 – REVISED JANUARY 1996

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

PARAMETER MEASUREMENT INFORMATION

PHL

DY1

CL = 50 pF

RL = 120 Ω

DA1

SHDN

DY2

DZ2

DA2

TEST CIRCUIT

(see Note A)

PHL

PLZ

PZL

PLH

PHZ

1.5 V 1.5 V 1.5 V 1.5 V

1.5 V 1.5 V

3 V

0 V

3 V

0 V

DY2

0 V

PZL

90% 90%

10%

90%

10% 10% 10%

0 V

VOLTAGE WAVEFORM

(see Note B)

50%

DY1

, DZ2

SHDN

DEN

SHDN

DEN

90%

10%

50%

90%

10%

50%

90%

10%

PZH

PLH

PHZ

10%

PZH

PLZ

NOTES: A. CL = 50 pF, RL = 120 Ω

B. The input waveform tr, tf ≤ 10 ns.

Figure 4. Single-Ended Driver Propagation and Transition Times

SN75LBC776

SINGLE-CHIP GeoPort TRANSCEIVER

SLLS221A – NOVEMBER 1995 – REVISED JANUARY 1996

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

PARAMETER MEASUREMENT INFORMATION

TEST CIRCUIT

PLH

PHZ

PZH

PHL

PLZ

PZL

1.5 V 1.5 V 1.5 V 1.5 V

1.5 V 1.5 V

90% 90%

10%

90%

10% 10% 10%

3 V

0 V

3 V

0 V

OD(H)

OD(L)

0 V

VOLTAGE WAVEFORM

(see Note A)

DY2

DZ2

DA2

RL = 60 Ω

50 pF

RL = 60 Ω

50%

SHDN

DEN

SHDN

DEN

Figure 5. Differential Driver Propagation and Transition Times

2 kΩ

15 pF

RA RB

Input

SHDN

Output

PLH

PHL

0 V 0 V

2.5 V

–2.5 V

1.5 V V

90% 90%

10% 10%

TEST CIRCUIT VOLTAGE WAVEFORM

(see Note A)

Figure 6. Receiver Propagation and Transition Times

NOTE A: The input waveform tr, tf ≤ 10 ns.

SN75LBC776 SINGLE-CHIP GeoPort TRANSCEIVER

SLLS221A – NOVEMBER 1995 – REVISED JANUARY 1996

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

PARAMETER MEASUREMENT INFORMATION

CL = 50 pF

RA RB

–2.5 V or 2.5 V

SHDN

PLZ

PZL

1.5 V

3 V

0 V

10%

90%

SHDN

TEST CIRCUIT

VOLTAGE WAVEFORM

(see Note A)

RL = 500 Ω

10%

90%

1.5 V

PHZ

PZH

S1 at V

S1 at GND

0 V

NOTE A: The input waveform tr, tf ≤ 10 ns.

Figure 7. Receiver Enable and Disable Test Circuit and Waveforms

SN75LBC776

SINGLE-CHIP GeoPort TRANSCEIVER

SLLS221A – NOVEMBER 1995 – REVISED JANUARY 1996

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

APPLICATION INFORMATION

GeoPort

Peripheral

Device

9-Pin

DCE

GeoPort

Host

SN75LBC776

9-Terminal

DTE

678

3495

13 12 7

18 15

RxD– RxD+

TxD+ TxD–

GND

RESET/ATT

SCLK

Power

TxHS/WAKE-UP

GeoPort

Controller

and USART

1 14 17

RxD

TxD

SHDN

DTR

RTXC

CTS RTS

Standard

Host

SN75LBC776

9-Terminal

DTE

7 6

16 TxHS/WAKE-UP

Power

GND

RxD–

RxD+

TxD+ TxD–

RESET/ATT

SCLK

0.1 µF

RESET/ATT SCLK

TxHS/WAKE-UP

–5 V

(see Note A)

0.1 µF

NOTE A: The AVX 0603YC104MATXA or equivalent is one of the possible capacitors that can be used as the charge pump capacitor.

Figure 8. GeoPort 9-Terminal DTE Connection Application

SN75LBC776 SINGLE-CHIP GeoPort TRANSCEIVER

SLLS221A – NOVEMBER 1995 – REVISED JANUARY 1996

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

APPLICATION INFORMATION

generator characteristics

EIA/TIA-232/V.28 EIA/TIA-423/V.10 562

PARAMETER

TEST CONDITIONS

MIN MAX MIN MAX MIN MAX

UNIT

Open circuit 25 4 6 13.2 V

|VO| Output voltage magnitude

3 kΩ ≤ RL ≤ 7 kΩ

5 15 NA 3.7 V

RL = 450 Ω NA 3.6 NA V

O(RING)

Output voltage ringing NA 10% 5%

Short-circuit output current VO = 0 100 150 60 mA

VCC = 0, |VO| < 2 V 300 NA 300 Ω

O(OFF)

Power-off output current

VCC = 0, |VO| < 6 V NA ±100 NA µA

SR Output voltage slew rate 30 NA 4 30 V/µs

±3.3 V to ±3.3 V NA NA 0.22 2.1 µs

Transition time

±3 V to ±3 V

0.04 NA NA ui

†

10% to 90% NA 0.3 NA ui

†

ui is the unit interval and is the inverse of the signaling rate (bit transmit time).

receiver characteristics

EIA/TIA-232/V.28 EIA/TIA-423/V.10 562

PARAMETER

TEST CONDITIONS

MIN MAX MIN MAX MIN MAX

UNIT

|VI| Input voltage magnitude 25 10 25 V

|VI| < 15 V –3 3 NA –3 3

VITInput voltage threshold

|VI| < 10 V NA –0.2 0.2 NA

3 V < |VI| < 15 V 3 7 NA 3 7 kΩ

RIInput resistance

|VI| < 10 V NA 4 NA kΩ

SN75LBC776

SINGLE-CHIP GeoPort TRANSCEIVER

SLLS221A – NOVEMBER 1995 – REVISED JANUARY 1996

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

MECHANICAL INFORMATION

DW (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE

16 PIN SHOWN

4040000/B 10/94

Seating Plane

0.400 (10,15)

0.419 (10,65)

0.104 (2,65) MAX

0.012 (0,30)

0.004 (0,10)

0.020 (0,51)

0.014 (0,35)

0.293 (7,45)

0.299 (7,59)

0.010 (0,25)

0.050 (1,27)

0.016 (0,40)

(15,24)

(15,49)

PINS **

0.010 (0,25) NOM

A MAX

DIM

A MIN

Gage Plane

0.500

(12,70)

(12,95)

0.510

(10,16)

(10,41)

0.400

0.410

0.600

0.610

(17,78)

0.700

(18,03)

0.710

0.004 (0,10)

0.010 (0,25)

0.050 (1,27)

0°–8°

NOTES: A. All linear dimensions are in inches (millimeters).

B. This drawing is subject to change without notice. C. Body dimensions do not include mold flash or protrusion not to exceed 0.006 (0,15). D. Falls within JEDEC MS-013

IMPORTANT NOTICE

T exas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability.

TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements.

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In order to minimize risks associated with the customer’s applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards.

TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. TI’s publication of information regarding any third party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.

Datasheet SN75LBC776DB, SN75LBC776DW, SN75LBC776DWR Datasheet (Texas Instruments)

Specifications and Main Features

Frequently Asked Questions

User Manual