參數(shù)資料
型號(hào)： AM7992BPC
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, PDIP24
封裝： PLASTIC, DIP-24
文件頁(yè)數(shù)： 7/27頁(yè)
文件大?。?/td> 224K
代理商： AM7992BPC
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
AM7992BPCB Serial Interface Adapter (SIA)
AM7992B Serial Interface Adapter (SIA)
AM7992BDC Serial Interface Adapter (SIA)
AM7992BDCB Serial Interface Adapter (SIA)
AM7992BJC Serial Interface Adapter (SIA)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AM7992BPCB 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Serial Interface Adapter (SIA)
AM7995DC 制造商:Advanced Micro Devices 功能描述:
AM7995DCB 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC
AM7996 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:IEEE 802.3/Ethernet/Cheapernet Transceiver
AM7996/BRA 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LAN Transceiver
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