NE83Q93 Datasheet, PDF (1/11 Pages) NXP Semiconductors – Enhanced coaxial Ethernet transceiver

Philips Semiconductors
Enhanced coaxial Ethernet transceiver
Product specification
NE83Q93
DESCRIPTION
The NE83Q93 is a low power 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 functionally the same as the NE83Q92, but with
additional features such as a transmit enable input, a carrier detect
output and five status LED driver outputs.
The NE83Q93 is manufactured on an advanced BiCMOS process
and is available in an SOL package making 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 application.
PIN CONFIGURATION
D, N Packages
CD+ 1
CD– 2
RX+ 3
V_EE ⁴
V_EE 5
RX– 6
TX+ 7
TX– 8
TEN ⁹
XLED 10
JLED ¹¹
LCOM 12
24 CDS
23 TXO
22 RXI
21 V_EE
20 RR–
19 RR+
18 GND
17 HBE
16 _CRS
15 RLED
14 LINK
13 CLED
SD00311
FEATURES
• Fully compliant with Ethernet II, IEEE 802.3 10BASE-5 and
10BASE-2, and ISO 8802/3 interface specifications
• Functionally compatible with industry standard 8392 applications
• Optimal implementation can use 1 Watt DC-DC converter and
reduces external parts count
• High efficiency AUI drivers minimize current consumption under
idle conditions by automatically powering-down
• Automatically disables AUI drivers when disconnecting coax
cable, allowing hard-wiring of AUI connector and local/integrated
CTI connection
ORDERING INFORMATION
DESCRIPTION
24-Pin Plastic Dual In-Line Package (DIP)
24-Pin Plastic Small Outline Large (SOL) Package
• Smart squelch on data inputs eliminates false activations
• Transmit enable input and carrier sense output for repeater
applications
• Five LED status drivers for transmit, receive, collision, jabber and
link fail indication
• Advanced BiCMOS process for extremely low power operation
• Available in 24-pin DIP and 24-pin SOL packages
• Full ESD protection
• Power-on reset prevents glitches on coaxial cable
TEMPERATURE RANGE
0 to +70°C
0 to +70°C
ORDER CODE
NE83Q93N
NE83Q93D
DWG #
0410D
SOT137-1
1995 May 1
1
853-1738 15180