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參數(shù)資料
| 型號： | 78Q8392LA03-CHR/F |
| 廠商： | Maxim Integrated |
| 文件頁數(shù)： | 9/14頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX 10BASE2/5 ETH 28PLCC |
| 標(biāo)準(zhǔn)包裝： | 500 |
| 系列： | * |
78Q8392L/A03
Low Power Ethernet
Coaxial Transceiver
Page: 4 of 14
2008 Teridian Semiconductor Corporation
Rev 1.3
PIN DESCRIPTION
NAME
TYPE
DESCRIPTION
CD+*/CD-
O
Collision Output. Balanced differential line driver outputs from the collision detect
circuitry. The 10 MHz signal from the internal oscillator is transferred to these
outputs in the event of collision, excessive transmission (jabber), or during CD
Heartbeat condition. These outputs are open emitters; pulldown resistors to VEE are
required. When operating into a 78
transmission line, these resistors should be
510
. In Cheapernet applications, where the 78 drop cable is not used, higher
resistor values (up to 1.5k) may be used to save power.
RX+*/RX-
O
Receive Output. Balanced differential line driver outputs from the Receiver. These
outputs also require 510
pulldown resistors.
TX+*/TX-
I
Transmit Input. Balanced differential line receiver inputs to the Transmitter. The
common mode voltage for these inputs is determined internally and must not be
externally established. Signals meeting Transmitter squelch requirements are
waveshaped and output at TXO.
HBE
I
disables it when connected to VEE.
RR+/RR-
I
External Resistor. A fixed 976
1% resistor connected between these pins
establishes internal operating currents.
Note: The previous generation 78Q8392L/A02 used a 1k
1% resistor
RXI
I
Receive Input. Connects directly to the coaxial cable. Signals meeting Receiver
squelch requirements are equalized for inter-symbol distortion, amplified, and output
at RX+ and RX- pins.
TXO
O
Transmit Output. Connects via an isolation diode to the coaxial cable.
CDS
I
Collision Detect Sense. Ground sense connection for the collision detect circuit. This
pin should be connected separately to the shield to avoid ground drops from altering
the receive mode collision threshold.
GND
S
Positive Supply Pin.
VEE
S
Negative Supply Pins. These pins should be connected to a large metal frame area
on the PC board to handle heat dissipation, and bypassed to the GND pin with a
0.1
F capacitor as close to the package as possible.
*IEEE names for CD± = CI±, RX± = DI±, TX± = DO±
Notes: Pin type: I-input; O-output; S-power supply
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| 78Q8392LA03-CP/F | 制造商:TERIDIAN 制造商全稱:TERIDIAN 功能描述:Low Power Ethernet Coaxial Transceiver |
| 78Q8392L-CP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Low Power Ethernet Coaxial Transceiver |
| 78Q8392L-DB | 制造商:TERIDIAN 功能描述:KIT 78Q8392L DEMO BOARD |
| 78Q8430 | 制造商:TERIDIAN 制造商全稱:TERIDIAN 功能描述:10/100 Ethernet MAC and PHY |
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