NE83Q92 Datasheet, PDF (1/9 Pages) NXP Semiconductors – Low-power coaxial Ethernet transceiver

Philips Semiconductors
Low-power coaxial Ethernet transceiver
Product specification
NE83Q92
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
D, N Packages
CD+ 1
CD– 2
RX+ 3
V_EE 4
V_EE 5
RX– 6
TX+ 7
TX– 8
16 CDS
15 TXO
14 RXI
13 V_EE
12 RR–
11 RR+
10 GND
9 HBE
A Packages
RX+ ⁴
V
5
EE
V
EE
6
VEE ₇
RX– 8
3 2 1 20 19
18 _RXI
17 V
EE
16 _V
EE
15 _RR–
14 RR+
9 10 11 12 13
4 3 2 1 28 27 26
V
EE
5
V
EE
6
V
EE
7
VEE ₈
VEE ₉
V
EE
10
VEE ₁₁
25 _VEE
24 VEE
23 VEE
22 V
EE
21 V
EE
20 V
EE
19 _RR–
12 13 14 15 16 17 18
SD00302
ORDERING INFORMATION
DESCRIPTION
16-Pin Plastic Dual In-Line Package (DIP)
16-Pin Plastic Small Outline Large (SOL) Package
20-Pin Plastic Leaded Chip Carrier (PLCC) Package
28-Pin Plastic Leaded Chip Carrier (PLCC) Package
1995 May 1
TEMPERATURE RANGE
0 to +70°C
0 to +70°C
0 to +70°C
0 to +70°C
1
ORDER CODE
NE83Q92N
NE83Q92D
NE83Q92A20
NE83Q92A
DWG #
SOT28-4
SOT162-1
SOT380-1
SOT261-3
853-1737 15180