参数资料
| 型号： | LT1331CNW#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 5/8页 |
| 文件大小： | 0K |
| 描述： | IC TXRX 5V/3V RS232 28-DIP |
| 标准包装： | 14 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 3/5 |
| 规程： | RS232 |
| 电源电压： | 3.3 V，5V |
| 安装类型： | 通孔 |
| 封装/外壳： | 28-DIP（0.600"，15.24mm） |
| 供应商设备封装： | 28-PDIP |
| 包装： | 管件 |
5
LT1331
PI FU CTIO S
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ON/OFF (Pin 13): A TTL/CMOS Compatible Operating
Mode Control. A logic low puts the device in the shutdown
mode. All drivers and four of the receivers go to a high
impedance state, and the VCC supply may be turned off. A
logic high fully enables the transceiver.
VL (Pin 14): Power Supply for Receivers. This pin should
be powered to the same voltage as the logic circuits
connected to the receiver outputs, either 5V or 3V. The VL
pin should be decoupled with a 0.1
F ceramic capacitor.
DRIVER DISABLE (Pin 16): A logic high shuts down the
charge pump, placing all drivers in a high impedance state.
All receivers remain active. Floating the pin, or driving it
to a logic low, fully enables the transceiver. A low voltage
on the ON/OFF pin supersedes the state of the driver
disable control.
GND (Pin 17): Ground.
LOW-Q RX OUT (Pin 18): Low Power Receiver Output.
This pin produces the same output levels as standard
receivers, with slightly decreased speed and short-circuit
current.
DRIVER IN (Pins 19, 23, 25): RS232 Driver Inputs.
Inputs are TTL/CMOS compatible. Tie unused inputs
to VCC.
RX OUT (Pins 20, 21, 22, 24): Receiver Outputs. RX1
through RX4 outputs are in a high impedance state when
in shutdown mode to allow data line sharing. Outputs,
including LOW-Q RX OUT, are fully short-circuit pro-
tected to ground, VCC, or VL. Output voltage levels are
determined by the choice of power supply VL.
V – (Pin 28): Negative Supply Output. V –
–(2VCC –
2.5V). This pin requires an external charge storage
capacitor, chosen to minimize ripple on V –. A minimum
value of 0.1
F is recommended.
V+ (Pin 1): Positive Supply Output. V+
2VCC – 1.5V. This
pin requires an external capacitor for charge storage,
chosen to minimize ripple to acceptable levels. A mini-
mum size of 0.1
F is recommended.
VCC (Pin 2): Power Supply for Charge Pump and Drivers.
Proper circuit operation is insured for VCC = 3V to 6V.
VCC = 5V operation gives full RS232 compliant perfor-
mance, 3V operation results in lower driver output ampli-
tude. The VCC pin should be decoupled with a 0.1F
ceramic capacitor.
C1+, C1–, C2+, C2– (Pins 3, 4, 26, 27): These pins require
two external capacitors C
≥ 0.2F. One from C1+ to C1–,
and another from C2+ to C2–. To maintain charge pump
efficiency, the capacitor’s effective series resistance should
be less than 2
. Low ESR tantalum capacitors work well
in this application, small value ceramic capacitors may
also be used with minimal reduction in charge pump
compliance.
DRIVER OUT (Pins 5, 7, 11): RS232 Driver Outputs.
Outputs are in a high impedance state when in shutdown,
driver disable, or VCC = 0V. Outputs are fully short-circuit
protected from V – + 30V to V + – 30V. Although the
outputs are protected, short circuits on one output can
load the power supply generator and may disrupt the
signal levels of the other outputs. The driver outputs are
protected against ESD to
±10kV for human body model
discharges. Output levels of – 3.3V to 4V are achieved
when the circuit is operated with VCC = 3.3V.
RX IN (Pins 6, 8, 9, 10): Receiver Inputs with 0.4V of
Hysteresis for Noise Immunity. These pins accept RS232
level signals (
±30V) into a protected 5k terminating
resistor. The receiver inputs are protected against ESD to
±10kV for human body model discharges.
LOW-Q RX IN (Pin 12): Low Power Receiver Input. This
receiver remains active in shutdown mode, consuming
only 60
A from supply VL. This receiver has the same
input and protection characteristics as receivers RX1
through RX4.
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| LT1331CS | 制造商:Linear Technology 功能描述:LINE TRANSCEIVER, PDSO28 |
| LT1331CSW | 功能描述:IC TXRX 5V/3V RS232 28-SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:27 系列:- 类型:收发器 驱动器/接收器数:3/3 规程:RS232，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
| LT1331CSW#PBF | 功能描述:IC TXRX 5V/3V RS232 28-SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:27 系列:- 类型:收发器 驱动器/接收器数:3/3 规程:RS232，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
| LT1331CSW#TR | 功能描述:IC TXRX 5V/3V RS232 SHDWN 28SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:27 系列:- 类型:收发器 驱动器/接收器数:3/3 规程:RS232，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
| LT1331CSW#TRPBF | 功能描述:IC TXRX 5V/3V RS232 28-SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:27 系列:- 类型:收发器 驱动器/接收器数:3/3 规程:RS232，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
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