Philips NE83Q92A20, NE83Q92D, NE83Q92N, NE83Q92A Datasheet

Philips Semiconductors Product specification

NE83Q92Low-power coaxial Ethernet transceiver

1995 May 1 853-1737 15180

DESCRIPTION

The NE83Q92 is a low power BiCMOS coaxial transceiver interface (CTI) for Ethernet (10base5) and Thin Ethernet (10base2) local area networks. The CTI is connected between the coaxial cable and the Data Terminal Equipment (DTE) and consists of a receiver, transmitter, receive-mode collision detector, heartbeat generator and jabber timer (see Block Diagram). The transmitter output connects directly to a doubly terminated 50Ω cable, while the receiver output, collision detector output and transmitter input are connected to the DTE through isolation transformers. Isolation between the CTI and the DTE is an IEEE 802.3 requirement that can be met on signal lines by using a set of pulse transformers. Power isolation for the CTI is achieved using DC-to-DC conversion through a power transformer (see Figure 1, Connection Diagram).

The part is fully pin compatible with the industry standard 8392, but has substantially lower current consumption, is fully compliant with the IEEE802.3 standard, and has additional features such as optional pull-down resistors (Figure 1, Note 4), and automatic selection between AUI and coaxial connections.

The NE83Q92 is manufactured on an advanced BiCMOS process and is available with PLCC and SOL packages which make it ideally suited to lap-top personal computers or systems where low power consumption, limited board space and jumperless design is required. Refer to selection flow chart for optimal apllication.

FEATURES

•Fully compliant with Ethernet II, IEEE 802.3 10BASE-5 and

10BASE-2, and ISO 8802/3 interface specifications

•100% drop-in compatible with industry standard 8392 sockets

(N & A options)

•Optimal implementation can use 1 Watt DC-DC converter and

reduces external part count by not requiring external pull-down resistors

•High efficiency AUI drivers automatically power-down under idle

conditions to minimize current consumption

•Automatically disables AUI drivers when no coaxial cable is

connected, allowing hard-wiring of AUI connection and local/integrated CTI connection

•Smart squelch on data inputs eliminates false activations

•Advanced BiCMOS process for extremely low power operation

•Available in 16-pin DIP, 16-pin SOL and both 20- and 28-pin

PLCC packages

•Expanded version (NE83Q93) with 5 LED status drivers is

available for repeater and advanced system applications

•Full ESD protection

•Power-on reset prevents glitches on coaxial cable

PIN CONFIGURATION

CD+ 1

CD– 2

RX+ 3

RX– 6

TX+ 7

TX– 8

16 CDS

15 TXO

14 RXI

13 V

12 RR–

11 RR+

10 GND

9 HBE

D, N Packages

1234

5 6 7 8

9 10 11

12 13 14 15 16 17 18

262728

RR–

RX+

CD–

CD+

CDS

TXO

N/C

RXI

RX–

TX+

TX–

HBE

GND

RR+

A Packages

20123

4 5 6 7 8

9 10 11 12 13

CD–

CD+

CDS

TXO

N/C

RXI

RR– RR+

TX+

TX–

HBE

GND

RX+

RX–

SD00302

ORDERING INFORMATION

DESCRIPTION TEMPERATURE RANGE ORDER CODE DWG #

16-Pin Plastic Dual In-Line Package (DIP)

0 to +70°C

NE83Q92N SOT28-4

16-Pin Plastic Small Outline Large (SOL) Package

0 to +70°C

NE83Q92D SOT162-1

20-Pin Plastic Leaded Chip Carrier (PLCC) Package

0 to +70°C

NE83Q92A20 SOT380-1

28-Pin Plastic Leaded Chip Carrier (PLCC) Package

0 to +70°C

NE83Q92A SOT261-3

Philips Semiconductors Product specification

NE83Q92Low-power coaxial Ethernet transceiver

1995 May 1

PIN DESCRIPTIONS

PIN NO.

N PKG

PIN NO.

PLCC-20

PIN NO.

PLCC-28

SYMBOL DESCRIPTION

1 2

2 3

CD+ CD–

Collision Outputs. Balanced differential line driver outputs which send a 10MHz signal to the DTE in the event of a collision, jabber interrupt or heartbeat test. External pull-down resistors are optional.

3 6

4 8

RX+ RX–

Receiver Outputs. Balanced differential line driver outputs which send the received signal to the DTE. External pull-down resistors are optional.

7 8

13 14

TX+ TX–

Transmitter Inputs. Balanced differential line receiver inputs which accept the transmission signal from the DTE and apply it to the coaxial cable at TXO, if it meets Tx squelch threshold.

9 12 15 HBE

Heartbeat Enable. The heartbeat function is disabled when this pin is connected to VEE and enabled when connected to GND or left floating.

11 12

14 15

18 19

RR+ RR–

External Resistor. A 1kΩ (1%) resistor connected between these pins establishes the signaling current at TXO.

14 18 26 RXI

Receiver Input. This pin is connected directly to the coaxial cable. Received signals are equalized, amplified, and sent to the DTE through the RX± pins, if it meets Rx squelch threshold.

15 19 28 TXO

Transmitter Output. This pin is connected directly (Thin Ethernet) or through an external isolating diode (Ethernet) to the coaxial cable.

16 20 1 CDS

Collision Detect Sense. Ground sense connection for the collision detection circuitry. This pin should be connected directly to the coaxial cable shield for standard Ethernet operation.

11 13

16 17

GND Positive Supply Pin.

4 5

5 – 7

16 – 17

5 to 11

20 to 25

Negative supply pins.

1 N/C Not used.

NOTE:

1. The IEEE 802.3 name for CD is CI; for RX is DI; for TX is DO.

Philips Semiconductors Product specification

NE83Q92Low-power coaxial Ethernet transceiver

1995 May 1

RECEIVER

AC–DC SQUELCH

TRANSMITTER

SQUELCH

COLLISION

COMPARATOR

& HEARTBEAT GENERATOR

JABBER

TIMER

RECEIVER

EQUALIZER

4–POLE BESSEL

LOW PASS FILTER

SENSE BUFFER

10MHz

OSC

LINE

DRIVER

COAX

CABLE

BUFFER

LINE

DRIVER

HEARTBEAT ENABLE

COLLISION

PAIR

(CD+, CD–)

TRANSMIT

PAIR

(TX+, TX–)

RECEIVE

PAIR

(RX+, RX–)

DTE

INTERFACE

RXI

TXO

CDS

SD00274

ABSOLUTE MAXIMUM RATINGS

SYMBOL PARAMETER RATING UNIT

Supply voltage

–12 V

Voltage at any input

0 to –12 V

STG

Storage temperature range –65 to +150

°C

SOLD

Lead soldering temperature (10sec.) +300

°C

Recommended max junction temperature

+150

°C

Thermal impedance (N and A packages) 60

°C/W

NOTE:

1. 100% measured in production.

2. The junction temperature is calculated from the following expression: T

= TA + θ

[(VEE x 0.015 x n

IDL

) + (VEE x 0.027 x nRX) + (VEE x 0.075 x nTX)]

where

= Ambient temperature in °C.

= Thermal resistance of package.

= Normal operating supply voltage in volts.

IDL

= Percentage of duty cycle idle

= Percentage of duty cycle receiving

= Percentage of duty cycle transmitting

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