參數(shù)資料
型號(hào)： ISL4243EIRZ-T
廠商： Intersil
文件頁(yè)數(shù)： 13/14頁(yè)
文件大小： 0K
描述： IC XMITTER/RCVR ESD RS232 32-QFN
標(biāo)準(zhǔn)包裝： 1
類型： 收發(fā)器
驅(qū)動(dòng)器/接收器數(shù)： 3/5
規(guī)程： RS232
電源電壓： 2.7 V ~ 5.5 V
安裝類型： 表面貼裝
封裝/外殼： 32-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 32-QFN 裸露焊盤（5x5）
包裝： 標(biāo)準(zhǔn)包裝
其它名稱： ISL4243EIRZ-TDKR
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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參數(shù)描述
ISL4244E 制造商:INTERSIL 制造商全稱: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 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:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:25 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:4.5 V ~ 5.5 V 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:16-PDIP 包裝:管件
ISL4244EIR-T 功能描述:IC 3DRVR/5RCVR RS232 3V 32-QFN 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:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:25 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:4.5 V ~ 5.5 V 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:16-PDIP 包裝:管件
ISL4244EIRZ 功能描述:IC TXRX RS232 2.7-5.5V 32QFN 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:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:發(fā)射器 驅(qū)動(dòng)器/接收器數(shù):4/0 規(guī)程:RS422，RS485 電源電壓:4.75 V ~ 5.25 V 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:帶卷 (TR)
ISL4244EIRZ-T 功能描述:IC 3DRVR/5RCVR RS232 3V 32-QFN 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:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:發(fā)射器 驅(qū)動(dòng)器/接收器數(shù):4/0 規(guī)程:RS422，RS485 電源電壓:4.75 V ~ 5.25 V 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:帶卷 (TR)
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