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參數(shù)資料
| 型號(hào)： | LTC1343IGW |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 通用總線功能 |
| 英文描述： | Software-Selectable Multiprotocol Transceiver |
| 中文描述： | LINE TRANSCEIVER, PDSO44 |
| 封裝： | 0.300 INCH, PLASTIC, SSOP-44 |
| 文件頁數(shù)： | 17/28頁 |
| 文件大?。?/td> | 382K |
| 代理商： | LTC1343IGW |
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17
LTC1343
No-Cable Mode
The no-cable mode (M0 = M1 = M2 = 1) is intended for the
case when the cable is disconnected from the connector.
The charge pump, bias circuitry, drivers and receivers are
turned off, the driver outputs are forced into a high
impedance state, and the supply current drops to less than
200
μ
A. It can also be used to share I/O lines with other
drivers and receivers without loading down the signals.
Charge Pump
The LTC1343 uses an internal capacitive charge pump to
generate V
DD
and V
EE
as shown in Figure 28. A voltage
doubler generates about 8V on V
DD
and a voltage inverter
generates about –7.5V for V
EE
. Four 1
μ
F surface mounted
tantalum or ceramic capacitors are required for C1, C2, C3
and C4. The V
EE
capacitor C5 should be a minimum of
3.3
μ
F. All capacitors are 16V.
Receiver Fail-Safe and Glitch Filter
All LTC1343 receivers feature fail-safe operation in all
modes except no-cable mode. If the receiver inputs are left
floating or shorted together by a termination resistor, the
receiver output will always be forced to a logic high.
External pull-up resistors are required on receiver outputs
if fail-safe operation in the no-cable mode is desired.
When the chip is configured for control signals by pulling
the CTRL/CLK pin high, a glitch filter is connected to all
receiver inputs. The filter will reject any glitches at the
receiver inputs less than 300ns.
V.10 Driver Rise and Fall Times
The rise and fall times of the V.10 drivers is programmed
by placing a 1/8W, 5% resistor between the 423 SET (Pin
25) and ground. The graph of Driver Rise and Fall Times
vs Resistor Value is shown in Figure 29.
Enabling the Single-Ended Driver and Receiver
When the LTC1343 is being used to generate the control
signals (CTRL/CLK = high) and the EC pin is pulled low, the
DCE/DTE pin becomes an enable for driver 1 and receiver
4 so their inputs and outputs can be tied together as shown
in Figure 30.
APPLICATIO
S I
FOR
ATIO
U
W
U
U
Figure 30. Single-Ended Driver and Receiver Enable
Figure 29. V.10 Driver Rise and Fall Time vs Resistor Value
Figure 28. Charge Pump
44
43
42
41
40
1343 F28
1
2
3
4
8
C3
1
μ
F
C4
1
μ
F
5V
C1
1
μ
F
C2
1
μ
F
C5
3.3
μ
F
LTC1343
V
DD
C1
+
PWRV
CC
C1
–
V
CC
C2
+
C2
–
V
EE
PGND
GND
+
+
+
+
+
RESISTANCE (
)
D
μ
s
1k
100
10
1
0.1
100k
1M
5M
1343 F29
10k
39
26
LTC1343
1343 F30
5
21
16
20
24
EC
D1
CTRL/CLK
DCE/DTE
R4
V
CC
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC1343I | Software-Selectable Multiprotocol Transceiver |
| LTC1343CGW | Software-Selectable Multiprotocol Transceiver |
| LTC1344A | Octal D-Type Transparent Read-Back Latches With 3-State Outputs 24-PDIP 0 to 70 |
| LTC1344AI | Software-Selectable Cable Terminator |
| LTC1344AIG | Software-Selectable Cable Terminator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1343IGW#PBF | 功能描述:IC TXRX SOFTWARE-SELECTBL 44SSOP RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 產(chǎn)品培訓(xùn)模塊:RS-232 & USB Transceiver 標(biāo)準(zhǔn)包裝:2,000 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):1/1 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:16-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:16-SSOP 包裝:帶卷 (TR) 其它名稱:296-19849-2 |
| LTC1343IGW#TR | 功能描述:IC TXRX SOFTWARE SELECT 44SSOP RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
| LTC1343IGW#TRPBF | 功能描述:IC TXRX SOFTWARE-SELECTBL 44SSOP RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
| LTC1344ACG | 功能描述:IC CABLE TERM MULTIPROTCL 24SSOP RoHS:否 類別:集成電路 (IC) >> 接口 - 信號(hào)終端器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 類型:SCSI，SE 端子數(shù):9 電源電壓:4 V ~ 5.25 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:管件 |
| LTC1344ACG#PBF | 功能描述:IC CABLE TERM MULTIPROTCL 24SSOP RoHS:是 類別:集成電路 (IC) >> 接口 - 信號(hào)終端器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 類型:SCSI，SE 端子數(shù):9 電源電壓:4 V ~ 5.25 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:管件 |
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