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參數(shù)資料
| 型號： | AM7992BDC |
| 廠商： | ADVANCED MICRO DEVICES INC |
| 元件分類： | 網(wǎng)絡(luò)接口 |
| 英文描述： | Serial Interface Adapter (SIA) |
| 中文描述： | DATACOM, MANCHESTER ENCODER/DECODER, CDIP24 |
| 封裝： | CERAMIC, DIP-24 |
| 文件頁數(shù)： | 7/27頁 |
| 文件大?。?/td> | 224K |
| 代理商： | AM7992BDC |
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Am7992B
7
Figure 3. TTL Clock Driver Circuit for X
1
SIA Oscillator
Specification for External Crystal
When using a crystal to drive the Am7992B oscillator,
the following crystal specification should be used to en-
sure a transmit accuracy of 0.01%:
Some crystal manufacturers have generated crystals
to this specification. One such manufacturer is Reeves-
Hoffman. Their ordering part number for this crystal is
RH#04-20423-312. Another manufacturer is Epson—
Part #MA 506-200M-50 pF, which is a surface-
mounted crystal.
Specification for External TTL Level
When driving the oscillator from an external clock
source, X
2
must be left floating (unconnected). An
external clock having the following characteristics
must be used to ensure less than +0.5 ns jitter at
Transmit+ (see the X
1
Driven from External Source
waveform diagram and the TTL Clock Driver Circuit
for X
1
, Figure 3):
I
Clock Frequency: 20 MHz
±
0.01%
I
Rise/Fall Time (t
R
/t
F
): <4 ns, monotonic
I
X
1
HIGH/LOW Time (t
HlGH
/t
LOW
): > 20 ns
I
X
1
Falling Edge-to-Falling Edge Jitter: <
±
0.2 ns at
1.5 V input
Receiver Path
The principle functions of the receiver are to signal the
LANCE that there is information on the receive pair and
to separate the incoming Manchester-encoded data
stream into clock and NRZ data.
The receiver section (see Figures 4 and 5) consists of
two parallel paths. The receive data path is a zero
threshold, wide bandwidth line receiver. The carrier
path is an offset threshold bandpass-detecting line re-
ceiver. Both receivers share common bias networks to
allow operation over an input common mode range of
0 V to 5.5V.
Limit
Unit
Min
Nominal Max
Resonant Frequency
Error with C
L
= 50 pF
–50
0
+50
PPM
Change in Resonant
Frequency Temperature
with C
L
= 50 pF
–40
+40
PPM
Parallel Resonant
Frequency with
C
L
= 50 pF
20
MHz
Motional Crystal
Capacitance, C
1
0.022
pF
X
1
ALS Driver or
Equivalent
03378I-7
Manchester
Decoder
Data
Receiver
Noise
Reject
Filter
Carrier
Detect
RX
RCLK
RENA
DI
±
03378I-8
Figure 4. Receiver
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AM7992BDCB | Serial Interface Adapter (SIA) |
| AM7992BJC | Serial Interface Adapter (SIA) |
| AM7992BJCB | Serial Interface Adapter (SIA) |
| AM7996DC | IEEE 802.3/Ethernet/Cheapernet Transceiver |
| AM7996DCB | IEEE 802.3/Ethernet/Cheapernet Transceiver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AM7992BDCB | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Serial Interface Adapter (SIA) |
| AM7992BDMB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Communications Interface |
| AM7992BJC | 制造商:Rochester Electronics LLC 功能描述: 制造商:Advanced Micro Devices 功能描述: 制造商:AMD 功能描述: |
| AM7992BJCB | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Serial Interface Adapter (SIA) |
| AM7992BJCTR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Communications Interface |
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