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PDF NE83Q92 Data sheet ( Hoja de datos )
| Número de pieza | NE83Q92 | |
| Descripción | Low-power coaxial Ethernet transceiver | |
| Fabricantes | Philipss | |
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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
VEE 4
VEE 5
RX– 6
TX+ 7
TX– 8
16 CDS
15 TXO
14 RXI
13 VEE
12 RR–
11 RR+
10 GND
9 HBE
A Packages
RX+ 4
V
EE
V
EE
VEE
RX–
5
6
7
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
1 page  
Philips Semiconductors
Low-power coaxial Ethernet transceiver
Product specification
NE83Q92
TIMING CHARACTERISTICS
VEE = –9V +6%; TA = 0 to 70°C, unless otherwise specified1. No external isolation diode on TXO.
SYMBOL
tRON
tRD
tRR
tRF
tOS
tRJ
tRHI
tRM
tTST
tTD
tTR
tTF
tTM
tTS
tTON
tTOFF
tCON
tCOFF
tCHI
fCD
tCP
tHON
tHW
tJA
tJR
PARAMETER
Receiver start up delay RXI to RX± (Figure 3)
First received bit on RX±
First validly timed bit on RX±
Receiver prop. delay RXI to RX±
Differential output rise time on RX± and CD±2,3
Differential output fall time on RX± and CD±2,3
Differential output settling time on RX± and CD±
to VOB = 40mV2 (see Figure 4)
Receiver and cable total jitter
Receiver high to idle time
Rise and fall time matching on RX+ and CD+5
Transmitter start–up delay TX± to TXO (Fig. 5)
First transmitted bit on TXO
First validly timed bit
Transmitter prop delay TX± to TXO
(see Figure 5)
Transmitter rise time 10% to 90% (see Figure 5)
Transmitter fall time 10% to 90% (see Figure 5)
tTF – tTR mismatch5
Transmitter added skew4,5
Transmitter turn on pulse width (see Figure 5)
Transmitter turn off pulse width (see Figure 5)
Collision turn on delay (see Figure 6)
Collision turn off delay (see Figure 6)
Collision high to idle time (see Figure 6)
Collision frequency (see Figure 6)
Collision signal pulse width (see Figure 6)
Heartbeat turn on delay (see Figure 7)
Heartbeat test duration (see Figure 7)
Jabber activation delay measured from TX± to
CD± (see Figure 8)
Jabber reset delay measured from TX± to CD±
(see Figure 8)
TEST CONDITIONS
VRXI = –2V peak
VRXI = –2V peak
Measured to +210mV
tRF – tRR
VTX+ = –1V peak
VTX+ = 1V peak
VTX± = 1V peak
VTX+ = 1V peak
0V to –2V step at RXI
–2V to 0V step at RXI
Measured to +210mV
MIN
200
5
20
20
10
125
200
8.5
35
0.6
0.5
20
250
LIMITS
TYP
3
20
5
5
1
±2
0.1
1
20
25
25
0
0
10
MAX
5
tRON +2
50
7
7
±6
850
±2
2
tTST + 2
50
30
30
±2
±2
35
200
13
16
850
11.5
70
1.6
1.5
60
650
UNIT
bits
bits
ns
ns
ns
µs
ns
ns
ns
bits
bits
ns
ns
ns
ns
ns
ns
ns
bits
bits
ns
MHz
ns
µs
µs
ms
ms
NOTES:
1. All typical values are for VEE = –9V and TA = 27°C.
2. Measured on secondary side of isolation transformer (see Figures NO TAG and 1, Connection Diagram). The transformer has a 1:1 turn
ratio with an inductance between 30 and 100µH at 5MHz.
3. The rise and fall times are measured as the time required for the differential voltage to change from –225mV to +225mV, or +225mV to
–225mV, respectively.
4. Difference in propagation delay between rising and falling edges at TXO.
5. Not 100% tested in production.
1995 May 1
5
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| PDF Descargar | [ Datasheet NE83Q92.PDF ] | |
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