參數(shù)資料
型號： SP502CM
英文描述： Multi-Mode Serial Transceiver
中文描述： 多模式串行收發(fā)器
文件頁數(shù)： 10/32頁
文件大?。?/td> 345K
代理商： SP502CM
Rev. 7/21/03
SP502 Multi-Mode Serial Transceiver
10
Copyright 2003 Sipex Corporation
V
CC
= +5V
–5V
+5V
–5V
V
SS
Storage Capacitor
V
DD
Storage Capacitor
C
1
C
2
C
3
C
4
+
+
+
+
–
–
–
–
Figure 4. Charge Pump Phase 3.
V
CC
= +5V
+10V
V
SS
Storage Capacitor
V
DD
Storage Capacitor
C
1
C
2
C
3
C
4
+
+
+
+
–
–
–
–
Figure 5. Charge Pump Phase 4.
Table 1. SP502 Drivers
Pin Label
Mode:
RS-232
V.35
RS-422
RS-485
RS-449
EIA-530
TDEC
3
–TDEC
0
SD(a)
0000
0010
1110
0100
0101
1100
1101
tri–state
RS-232
V.35–
RS-422–
RS-485–
RS-422–
RS-422–
SD(b)
tri–state
tri–state
V.35+
RS-422+
RS-485+
RS-422+
RS-422+
TR(a)
tri–state
RS-232
RS-232
RS-422–
RS-485–
RS-422–
RS-422–
TR(b)
tri–state
tri–state
tri–state
RS-422+
RS-485+
RS-422+
RS-422+
RS(a)
tri–state
RS-232
RS-232
RS-422–
RS-485–
RS-422–
RS-422–
RS(b)
tri–state
tri–state
tri–state
RS-422+
RS-485+
RS-422+
RS-422+
RL(a)
tri–state
RS-232
RS-232
RS-422–
RS-485–
RS-423
RS-423
RL(b)
tri–state
tri–state
tri–state
RS-422+
RS-485+
tri–state
tri–state
LL(a)
tri–state
RS-232
RS-232
RS-422–
RS-485–
RS-423
RS-423
LL(b)
tri–state
tri–state
tri–state
RS-422+
RS-485+
tri–state
tri–state
ST(a)
tri–state
RS-232
V.35–
RS-422–
RS-485–
RS-422–
RS-422–
ST(b)
tri–state
tri–state
V.35+
RS-422+
RS-485+
RS-422+
RS-422+
TT(a)
tri–state
RS-232
V.35–
RS-422–
RS-485–
RS-422–
RS-422–
TT(b)
tri–state
tri–state
V.35+
RS-422+
RS-485+
RS-422+
RS-422+
power supplies should provide a power
supply sequence of: +l0V, then +5V, followed
by –l0V.
Drivers
The
SP502
has six (6) drivers which can be
programmed in six different modes of opera-
tion. One of the drivers for the
SP502
is inter-
nally connected to an internal receiver input to
make up a half-duplex configuration. As shown
in the Mode Diagrams, the driver input of the
half-duplex channel is shared with an adjacent
driver such that when one is active the other is
disabled.
Control for the mode selection is done via a
four–bit control word. The
SP502
does not have
a latch; the control word must be externally
latched either high or low to write the appropri-
ate code into the
SP502
. The drivers are pre-
arranged such that for each mode of operation
the relative position and functionality of the
drivers are set up to accommodate the selected
interface mode. As the mode of the drivers is
changed, the electrical characteristics will change
to support the requirements of clock, data, and
control line signal levels.
Table 1
shows a sum-
mary of the electrical characteristics of the driv-
ers in the different interface modes. Unused
driver inputs can be left floating; however, to
ensure a desired state with no input signal, pull–
up resistors to +5V or pull–down resistors to
ground are suggested. Since the driver inputs
are both TTL or CMOS compatible, any value
resistor less than 100k
will suffice.
There are three basic types of driver circuits —
RS-232, RS-423, and RS-485. The RS-232 driv-
ers output a minimum of
±
5V level single–ended
signals (with 3k
and 2500pF loading), and
*The ST and TT driver outputs cannot be enabled simultaneously.
相關(guān)PDF資料
PDF描述
SP503 Multiprotocol Transceiver
SP503AN Application Note
SP503CF Multiprotocol Transceiver
SP503EB Application Note
SP503EF Multiprotocol Transceiver
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SP503 制造商:EXAR 制造商全稱:EXAR 功能描述:Multiprotocol Transceiver
SP503AN 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Application Note
SP503CF 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Application Note
SP503CM-L 功能描述:總線收發(fā)器 Full Duplex RS-485 s RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel
SP503EB 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Application Note
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