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參數(shù)資料
| 型號(hào)： | CN8223EPF |
| 英文描述： | ATM/SONET TRANSCEIVER|CMOS|QFP|160PIN|PLASTIC |
| 中文描述： | 的ATM / SONET的收發(fā)器|的CMOS | QFP封裝| 160PIN |塑料 |
| 文件頁(yè)數(shù)： | 136/161頁(yè) |
| 文件大?。?/td> | 1865K |
| 代理商： | CN8223EPF |
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All timing measurements in the following tables are with 20 pF loading on the
output pins.
4.0 Electrical and Mechanical Specifications
CN8223
4.2 DC Characteristics
ATM Transmitter/Receiver with UTOPIA Interface
4-2
Conexant
100046D
4.2 DC Characteristics
All input and bidirectional pins have input thresholds compatible with CMOS
drive levels except those labeled as xxxHS±. Leakage current for each pin is less
than 10 μA in any state. This device should be handled as an ESD-sensitive
device. Voltage on any signal pin that exceeds the power supply voltage by more
than +0.5 V can induce destructive latchup.
At V
OL(max)
= 0.4 V and V
OL(min)
= 2.4 V all output and bidirectional pins
have drive current I
OL
= 4 mA and I
OH
=
–
4 mA except for TXOUT[0] and
TCLKO, which are 8 mA drivers. The interrupt output pins are open drain and
require external pull-up resistors. All output and bidirectional pins (except those
labeled xxxHS±) have CMOS drive levels and can be used with CMOS or TTL
logic.
The RXCKI_HS±, TXCKI_HS±, and RXIN_HS± inputs are differential
PECL level inputs for use in E4 and STS-3c/STM-1 modes. These inputs are
automatically selected in these modes and have input thresholds of Vdd
–
1.3 V
The PECL inputs should have V
IL
= 3.4 V and V
IH
= 4.0 V The TXOUT_HS±
and TCLKO_HS± outputs are differential PECL outputs for use in E4 and
STS-3c/STM-1 modes. The
“
HS±
”
outputs are active at all times and should be
used (in E4 or STS-3c/STM-1 modes) in place of the TXOUT[0] and TCLKO
outputs, respectively. The
“
non-HS±
”
outputs are automatically disabled in E4 or
STS-3c/STM-1 modes to reduce switching noise injection into the IC. The
switching threshold is at 3.7 V with a V
OL(max)
of 3.3 V (driver off with external
resistor termination) and V
OH(min)
of 4.1 V (driver on).
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