参数资料
| 型号： | ISL4243EIR |
| 厂商： | Intersil |
| 文件页数： | 13/14页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS232 2.7-5.5VESD 32-QFN |
| 标准包装： | 60 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 3/5 |
| 规程： | RS232 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-QFN 裸露焊盘（5x5） |
| 包装： | 管件 |
8
FN8037.7
June 10, 2010
ISL4241E and ISL4243E monitor receivers remain active
even during manual power-down, making them extremely
useful for Ring Indicator monitoring. Standard receivers
driving powered down peripherals must be disabled to
prevent current flow through the peripheral’s protection
diodes (see Figures 2 and 3). This renders them useless for
wake-up functions, but the corresponding monitor receiver
can be dedicated to this task as shown in Figure 3.
Low Power Operation
These 3V devices require a nominal supply current of
0.3mA, even at VCC = 5.5V, during normal operation (not in
power-down mode). This is considerably less than the 5mA
to 11mA current required by comparable 5V RS-232 devices,
allowing users to reduce system power simply by switching
to this new family.
Power-down Functionality
The already low current requirement drops significantly
when the device enters power-down mode. In power-down,
supply current drops to 10nA, because the on-chip charge
pump turns off (V+ collapses to VCC, V- collapses to GND),
and the transmitter outputs three-state. Inverting receiver
outputs disable only in manual power-down; refer to Table 2
for details. This micro-power mode makes the ISL4241E and
ISL4243E ideal for battery powered and portable
applications.
TABLE 2. POWER-DOWN AND ENABLE LOGIC TRUTH TABLE
RS-232
SIGNAL
PRESENT
AT
RECEIVER
INPUT?
SHDN OR
FORCEOFF
INPUT
FORCEON
INPUT
EN
INPUT
TRANSMITTER
OUTPUTS
RECEIVER
OUTPUTS
ROUTB
OUTPUTS
INVALID
OUTPUT
MODE OF OPERATION
ISL4241E
N.A.
L
N/A
L
High-Z
Active
N/A
Manual Power-down
N.A.
L
N/A
H
High-Z
Active
N/A
Manual Power-down w/Receiver
Disabled
N.A.
H
N/A
L
Active
N/A
Normal Operation
N.A.
H
N/A
H
Active
High-Z
Active
N/A
Normal Operation w/Receiver
Disabled
ISL4243E
NO
H
N/A
Active
L
Normal Operation
(Auto Power-down Disabled)
YES
H
L
N/A
Active
H
Normal Operation
(Auto Power-down Enabled)
NO
H
L
N/A
High-Z
Active
L
Power-down Due to Auto Power-down
Logic
YES
L
X
N/A
High-Z
Active
H
Manual Power-down
NO
L
X
N/A
High-Z
Active
L
Manual Power-down
FIGURE 2. POWER DRAIN THROUGH POWERED DOWN
PERIPHERAL
OLD
VCC
POWERED
GND
SHDN = GND
VCC
Rx
Tx
VCC
CURRENT
VOUT = VCC
FLOW
RS-232 CHIP
DOWN
UART
ISL4241E, ISL4243E
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL4243EIR-T | 功能描述:IC 3DRVR/5RCVR RS232 3V 32-QFN RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:25 系列:- 类型:收发器 驱动器/接收器数:2/2 规程:RS232 电源电压:4.5 V ~ 5.5 V 安装类型:通孔 封装/外壳:16-DIP（0.300"，7.62mm） 供应商设备封装:16-PDIP 包装:管件 |
| ISL4243EIRZ | 功能描述:RS-232接口集成电路 RS232 3V 3D/5R 15KV AUTODWN 32QFN IND RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| ISL4243EIRZ-T | 功能描述:RS-232接口集成电路 RS232 3V 3D/5R 15KV AUTODWN 32QFN IND RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| ISL4244E | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:QFN Packaged, ±15kV ESD Protected, +2.7V to +5.5V, 10Nanoamp, 250kbps/1Mbps, RS-232 Transceivers with Enhanced Automatic Power-down |
| ISL4244EIR | 功能描述:IC 3DRVR/5RCVR RS232 3V 32-QFN RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:25 系列:- 类型:收发器 驱动器/接收器数:2/2 规程:RS232 电源电压:4.5 V ~ 5.5 V 安装类型:通孔 封装/外壳:16-DIP（0.300"，7.62mm） 供应商设备封装:16-PDIP 包装:管件 |
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