NE8392CN NXP Semiconductors, NE8392CN Datasheet

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NE8392CN

Manufacturer Part Number
NE8392CN
Description
Manufacturer
NXP Semiconductors
Datasheet
1.NE8392CN.pdf (9 pages)

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Philips Semiconductors
DESCRIPTION
The NE8392C Coaxial Transceiver Interface (CTI) is a bipolar
coaxial line driver/receiver 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 50 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
normally available in a standard 16-pin DIP. Power isolation for the
CTI is achieved using DC-to-DC conversion through a power
transformer (see Figure 1, Connection Diagram).
During transmission the jabber timer is initiated to disable the CTI
transmitter in the event of a longer than legal length data packet.
Receive-mode collision detection circuitry monitors the signals on
the coaxial cable to determine the presence of colliding packets and
signals the DTE in the event of a collision. At the end of every
transmission the heartbeat generator creates a pseudo collision for
a short time to ensure that the collision circuitry is functioning
correctly. The heartbeat function can be disabled for repeater
applications.
The CTI is normally part of a three chip set that implements a
complete Ethernet/ Thin Ethernet network interface for a DTE (see
Figure 2, Interface Diagram). The other chips are a Serial Network
Interface (SNI) and a Network Interface Controller (NIC). The SNI
provides Manchester Encoding and Decoding while the NIC handles
the media access protocol and buffer management tasks.
FEATURES
ORDERING INFORMATION
1995 May 1
16-Pin Plastic Dual In-Line Package (DIP)
28-Pin Plastic Lead Chip Carrier (PLCC)
Compatible with Ethernet II IEEE 802.3 10base5 and 10base2,
and ISO 8802/3 interface specifications
100% drop-in compatible with industry standard 8392 sockets
Integrates all transceiver electronics except signal and power
isolation
Only one external resistor required for setting coaxial signaling
current
Jabber timer function integrated on chip
Heartbeat generator can be externally disabled for operation as
IEEE 802.3 compatible repeaters
Coaxial transceiver interface for Ethernet/Thin Ethernet
DESCRIPTION
1
PIN CONFIGURATION
On-chip precision voltage reference for receive mode collision
detection
Squelch circuitry on all signal inputs rejects noise
Full ESD protection
Standard 16-pin DIP and 28-pin PLCC packages
Power-on reset prevents glitches on coaxial cable during power
up.
Also available in advanced low-power BiCMOS technology. (See
selection chart and data sheets for the NE83C92, NE83Q92 or
NE83Q93 for appropriate optimal usages)
TEMPERATURE RANGE
0 to +70 C
0 to +70 C
V
V
V
V
V
V
V
EE
EE
EE
EE
EE
EE
EE
V
V
10
11
CD+
CD–
RX+
RX–
TX+
5
6
7
8
9
TX–
EE
EE
12 13 14 15 16 17 18
4
7
2
3
6
8
1
5
4
N PACKAGE
A PACKAGE
3
2
1
ORDER CODE
NE8392CN
NE8392CA
28
27
14
16 CDS
15 TXO
13 V
12 RR–
11 RR+
10 GND
9
26
Product specification
RXI
HBE
EE
NE8392C
25
24
23
22
21
20
19
853-1693 15180
V
V
V
V
V
V
RR–
EE
EE
EE
EE
EE
EE
SOT261-3
SOT28-4
DWG #
SD00283

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NE8392CN Summary of contents

Page 1

... Power-on reset prevents glitches on coaxial cable during power up. Also available in advanced low-power BiCMOS technology. (See selection chart and data sheets for the NE83C92, NE83Q92 or NE83Q93 for appropriate optimal usages) TEMPERATURE RANGE ORDER CODE 0 to +70 C NE8392CN 0 to +70 C NE8392CA 1 Product specification NE8392C 16 CDS 15 TXO ...

Page 2

Philips Semiconductors Coaxial transceiver interface for Ethernet/Thin Ethernet PIN DESCRIPTIONS PIN NO. PIN NO. SYMBOL N PKG PLCC 1 2 CD+ Collision Outputs. Balanced differential line driver outputs which send a 10MHz oscillation signal CD– the DTE ...

Page 3

Philips Semiconductors Coaxial transceiver interface for Ethernet/Thin Ethernet BLOCK DIAGRAM COAX CABLE BUFFER RXI RECEIVER EQUALIZER 4–POLE BESSEL LOW PASS FILTER TXO CDS SENSE BUFFER HEARTBEAT ENABLE 1995 May 1 LINE DRIVER RECEIVER AC–DC SQUELCH TRANSMITTER TRANSMITTER SQUELCH COLLISION COMPARATOR ...

Page 4

Philips Semiconductors Coaxial transceiver interface for Ethernet/Thin Ethernet ELECTRICAL CHARACTERISTICS V = –9V +5 +70 C unless otherwise specified EE A SYMBOL SYMBOL PARAMETER PARAMETER Power–on reset voltage. Transmitter disabled V POR for |V | ...

Page 5

Philips Semiconductors Coaxial transceiver interface for Ethernet/Thin Ethernet TIMING CHARACTERISTICS V = –9V +5 unless otherwise specified EE A SYMBOL SYMBOL PARAMETER PARAMETER Receiver start up delay RXI to RX (Figure 3) First received ...

Page 6

Philips Semiconductors Coaxial transceiver interface for Ethernet/Thin Ethernet The equalizer is a high pass filter that compensates for the low pass effect of the coaxial cable and results in a flatband response over all signal frequencies to minimize signal distortion. ...

Page 7

Philips Semiconductors Coaxial transceiver interface for Ethernet/Thin Ethernet AUI CABLE 12 TO 15V CONVERTER 1 COLLISION 78 PAIR 2 T1 (NOTE 1) (NOTE 3) 4 RECEIVE 78 PAIR 5 7 TRANSMIT PAIR 8 NOTES ...

Page 8

Philips Semiconductors Coaxial transceiver interface for Ethernet/Thin Ethernet RXI RXI + RX t TST + TON TXO 1 RXI 0V –2V t CON CD+ 1995 May PHASE ...

Page 9

Philips Semiconductors Coaxial transceiver interface for Ethernet/Thin Ethernet + TXO + CD 1995 May HON HW Figure 7. Heartbeat Timing t JR Figure 8. Jabber Timing 9 Product specification NE8392C ...

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