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參數(shù)資料
| 型號： | SP526CF-L |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 7/24頁 |
| 文件大小： | 0K |
| 描述： | IC TXRX WAN MULTI-MODE 44LQFP |
| 產(chǎn)品變化通告： | Product Discontinuation 21/Dec/2011 |
| 標準包裝： | 160 |
| 類型： | 收發(fā)器 |
| 驅(qū)動器/接收器數(shù)： | 4/4 |
| 規(guī)程： | 多協(xié)議 |
| 電源電壓： | 5V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 44-LQFP |
| 供應商設備封裝： | 44-LQFP（10x10） |
| 包裝： | 托盤 |
15
Rev: C Date:2/1/06
SP526 Multi–Mode Serial Transceiver
Copyright 2006 Sipex Corporation
THEORY OF OPERATION
The SP526 device is made up of 1) the drivers,
2) the receivers, and 3) a charge pump.
Drivers
The SP526 has four enhanced independent
drivers. Control for the mode selection is done
via a two–bit control word into DP0 and DP1.
The drivers are prearranged 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
themodeofthedriversischanged,theelectrical
characteristics will change to support the
required signal levels. The mode of each driver
in the different interface modes that can be
selected is shown in Table 1.
There are four basic types of driver circuits —
RS-232 (V.28),RS-423(V.10),RS-422(V.11),
and RS-485.
TheRS-232(V.28)driversoutputsingle–ended
signals with a minimum of 5V (with 3K &
2500pF loading), and can operate to at least
120Kbps. Since the SP526 uses a charge pump
to generate the RS-232 output rails, the driver
outputs will never exceed 10V.
The RS-423 (V.10) drivers are also single–
ended signals which produce open circuit VOL
and VOH measurements of 4.0V to 6.0V.
When terminated with a 450 load to ground,
thedriveroutputwillnotdeviatemorethan10%
of the open circuit value. This is in compliance
FEATURES
The SP526 contains highly integrated serial
transceiversthatofferprogrammabilitybetween
interface modes through software control. The
SP526 offers the hardware interface modes for
RS-232(V.28),RS-423(V.10),RS-422(V.11),
and RS-485. The interface mode selection is
done via two control pins.
The SP526 has four drivers, four receivers, and
an on-board charge pump that is ideally suited
for low-cost wide area network connectivity
andothermulti-protocolapplications. Basedon
our multi-mode SP500 family, Sipex has
allocated specific transceiver cells, or "building
blocks,"fromthisproductseriesandcreatedthe
SP526. Sipex's "building blocks" concept
allows these small transceiver cells to be
packaged to offer a simple low-cost solution to
networking applications that need only 4
interface modes. For example, an 8-channel
applications requiring eight serial transceivers
can be achieved implementing two SP526
devices. The SP526 can be implemented in
series with other devices in our SP500 family.
A9-channelnetworkapplicationcanbeachieved
implementing the SP505 which contains seven
transceivers in conjunction with the SP526.
1
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8
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Table 1. SP526 Driver and Receiver Mode Selection with the Control Lines D1 and D0
D1 D0
DRIVERS RECEIVERS
T1 T2 T3 T4 w R1 R2 R3 R4
0 0 SHUTDOWN - Tx and Rx Outputs in Tri-State Mode
0 1 V.11 V.11 V.11 V.10 V.11 V.11 V.11 V.11
1 0 V.11 V.11 V.10 V.10 V.11 V.11 V.11 V.11
1 1 V.28 V.28 V.28 V.28 V.28 V.28 V.28 V.28
Table 1. SP526 Driver and Receiver Mode Selection with the Control Lines D1 and D0
T1A T1B T2A T2B T3A T3B T4
R1A R1B R2A R2B R3A R3B R4A R4B
0
1 V.11 V.11 V.11 V.11 V.11 V.11 V.10 V.11 V.11 V.11 V.11 V.11 V.11 V.11 V.11
1
0 V.11 V.11 V.11 V.11 V.10 V.10 V.10 V.11 V.11 V.11 V.11 V.11 V.11 V.11 V.11
1
1 V.28
X
V.28
X
V.28
X
V.28 V.28
X
V.28
X
V.28
X
V.28
X
R1A
High Z
D1 D0
Drivers
Receivers
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