- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄372185 > SP502CM Multi-Mode Serial Transceiver PDF資料下載
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)： | 8/32頁 |
| 文件大?。?/td> | 345K |
| 代理商： | SP502CM |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁當前第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁
Rev. 7/21/03
SP502 Multi-Mode Serial Transceiver
8
Copyright 2003 Sipex Corporation
FEATURES…
The
SP502
is a highly integrated serial trans-
ceiver that allows software control of its inter-
face modes. The
SP502
offers hardware inter-
face modes for RS-232 (V.28), RS-422A (V.11),
RS-449, RS-485, V.35, and EIA-530. The inter-
face mode selection is done via an 8–bit switch;
four (4) bits control the drivers and four (4) bits
control the receivers. The
SP502
is fabricated
using low–power BiCMOS process technology,
and incorporates a
Sipex
patented (5,306,954)
charge pump allowing +5V only operation. Each
THEORY OF OPERATION
Charge–Pump
The charge pump is a
Sipex
patented design
(5,306,954) and uses a unique approach com-
pared to older less efficient designs. The charge
pump still requires four external capacitors, but
uses a four–phase voltage shifting technique to
attain symmetrical 10V power supplies.
Figure
3a
shows the waveform found on the positive
side of capcitor C
, and
Figure 3b
shows the
negative side of capcitor C
. There is a free–
running oscillator that controls the four phases
of the voltage shifting. A description of each
phase follows.
Phase 1
— V
charge storage —During this phase of
the clock cycle, the positive side of capacitors
C
and C
are initially charged to +5V. C
then switched to ground and the charge on C
is transferred to C
to +5V, the voltage potential across capacitor
C
2
is now 10V.
+
is
–
–
. Since C
+
is connected
Phase 2
— V
transfer — Phase two of the clock con-
nects the negative terminal of C
to the V
SS
storage capacitor and the positive terminal of C
2
to ground, and transfers the generated –l0V to
C
3
. Simultaneously, the positive side of capaci-
Pin 78 — DSR— Data Set Ready; TTL output;
sourced from DM(a), DM(b) inputs.
Pin 80 — CTS— Clear To Send; TTL output;
sourced from CS(a) and CS(b) inputs.
CONTROL REGISTERS
Pins 2–5 — RDEC0 – RDEC3 — Receiver
decode register; configures receiver modes; TTL
inputs.
Pin 6 — ST/TT — Enables ST or TT drivers,
TTL input.
Pins 12–9 — TDEC0 – TDEC3 — Transmitter
decode register; configures transmitter modes;
TTL inputs.
POWER SUPPLIES
Pins 8, 25, 33, 41, 48, 55, 62, 73, 74 — V
CC
—
+5V input.
Pins 7, 29, 34, 43, 46, 50, 53, 57, 60, 64, 72, 75
— GND — Ground.
Pin 27 — V
+10V Charge Pump Capacitor —
Connects from V
to V
CC
. Suggested capaci-
tor size is 22
μ
F, 16V.
Pin 32 — V
–10V Charge Pump Capacitor —
Connects from ground to V
SS
. Suggested ca-
pacitor size is 22
μ
F, 16V.
Pins 26 and 30 — C
Capacitor — Connects from C
gested capacitor size is 22
μ
F, 16V.
Pins 28 and 31 — C
Capacitor — Connects from C
gested capacitor size is 22
μ
F, 16V.
+
and C
–
— Charge Pump
+
to C
1
–
. Sug-
+
and C
–
— Charge Pump
+
to C
2
–
. Sug-
NOTE: NC pins should be left floating; internal
signals may be present.
device is packaged in an 80–pin Quad FlatPack
package.
The
SP502
is ideally suited for wide area net-
work connectivity based on the interface modes
offered and the driver and receiver configura-
tions. The
SP502
has five (5) independent driv-
ers and six (6) independent receivers and one
half–duplex transceiver channel, which allows
a maximum of six (6) drivers and seven (7)
receivers. The driver and receiver configuration
for the
SP502
is ideal for DTE applications. The
SP502
is made up of four separate circuit blocks
– the charge pump, drivers, receivers, and
decoder. Each of these circuit blocks is de-
scribed in detail below.
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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。