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PDF 78Q8392LA03 Data sheet ( Hoja de datos )
| Número de pieza | 78Q8392LA03 | |
| Descripción | Low-Power Ethernet Coaxial Transceiver | |
| Fabricantes | Teridian Semiconductor | |
| Logotipo |  |
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78Qww8w3.D9ata2ShLee/t4AU.0com3
Low Power Ethernet
Coaxial Transceiver
DESCRIPTION
The 78Q8392L/A03 Ethernet Transceiver is a
replacement for the SSI/TDK/Teridian
78Q8392L/A02 coax line transmitter/receiver. Only a
single resistor value change is required for
upgrading an existing 78Q8392L/A02 design to the
78Q8392L/A03.
The device includes analog transmit and receive
buffers, a 10 MHz on-board oscillator, timing logic
for jabber and heartbeat functions, output drivers
and bandgap reference, in addition to a current
reference and collision detector.
This transceiver provides the interface between the
single-ended coaxial cable signals and the
Manchester-encoded differential logic signals.
Primary functional blocks include the receiver,
transmitter, collision detection and jabber timer. This
IC may be used in either internal or external MAU
environments.
The 78Q8392L/A03 is available in lead-free 16-pin
plastic and 28-pin PLCC packages.
November 2008
FEATURES
• Very low power consumption
• Compliant with Ethernet II, IEEE 802.3
10Base5 and 10Base2
• Integrates all transceiver functions except
signal and power isolation
• Innovative design minimizes external
component count and power consumption
• Jabber timer function integrated on chip
• Externally selectable CED heartbeat allows
operation with IEEE 802.3 compatible
repeaters
• Squelch circuitry at all inputs rejects noise
• Power-on reset and test modes
• Advanced BiCMOS process
CONNECT DIAGRAM
510 ±5%
x4
COLLISION
SIGNAL
TO DTE
DATA TO
DTE
DATA FROM
DTE
1 CD+
2 CD–
3 RX+
6 RX–
7 TX+
78
8 TX-
VEE 4
VEE 5
VEE
CDS
TXO
RXI
GND
13
16
15
14
10
HBE 9
RR- 12
RR+ 11
–9V
COAX
Page: 1 of 14
© 2008 Teridian Semiconductor Corporation
Rev 1.3
1 page  
78wQww8.3Da9ta2ShLee/tA4U0.co3m
Low Power Ethernet
Coaxial Transceiver
ELECTRICAL SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
Absolute maximum ratings indicate limits beyond which permanent damage may occur. Continuous operation at
these limits is not recommended; operations should be limited to those conditions specified under recommended
operating characteristics.
PARAMETER
Supply Voltage
Input Voltage
Storage Temperature
Soldering (Reflow or Dip)
Package power dissipation
RATING
-10V
0 to VEE
-65 to 150°C
235°C for 10 sec
1.0 watts @ 25°C
DC OPERATING CHARACTERISTICS
0°C ≤ T (ambient) ≤ +70°C, VEE = -9V ± 5%
PARAMETER
IEE1 Supply current out of
VEE pin - non-transmitting
IEE2 Supply current out of
VEE pin - transmitting
IRXI Receive input bias
current (RXI)
ITDC Transmit output dc
current level (TXO)
ITAC Transmit output ac
current level (TXO)
VCD Collision threshold
(Receive mode)
VOD Differential output voltage
(RX±, CD±)
VOC Common mode output
voltage (RX±, CD±)
VOB Differential output voltage
imbalance (RX±, CD±)
VTS Transmitter squelch
threshold (TX±)
CX Input capacitance (RXI)
RRXI Shunt resistance –
non-transmitting (RXI)
RTXO
Shunt resistance –
transmitting (TXO)
CONDITION
See Note 3
See Note 4
See Notes 4 & 5
See Note 9
See Notes 3 & 7
See Note 3, 6 & 7
See Notes 3, 7 & 8
See Note 3
See Note 4
MIN NOM MAX
68
UNIT
mA
50 65
mA
-2
37
±28
-1.58
±550
-3.0
-340
100
200
+25
41 45
-1.52
ITDC
-1.404
±1200
-2.5 -2.0
±40
-260 -200
1.2
150
µA
mA
mA
V
mV
V
mV
mV
pF
kΩ
kΩ
Page: 5 of 14
© 2008 Teridian Semiconductor Corporation
Rev 1.3
5 Page 
78wQww8.3Da9ta2ShLee/tA4U0.co3m
Low Power Ethernet
Coaxial Transceiver
10 MHz
1:1 TX+
39Ω ±1%
VTS
39Ω ±1%
78Q8392L/A03
TX-
GND
FIGURE 10: Test Circuit for TX± Input
Page: 11 of 14
© 2008 Teridian Semiconductor Corporation
Rev 1.3
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet 78Q8392LA03.PDF ] | |
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