- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄9907 > ISL3241EIRZ (Intersil)IC TXRX RS232 ESD-PROT 32-QFN PDF資料下載
參數(shù)資料
| 型號： | ISL3241EIRZ |
| 廠商： | Intersil |
| 文件頁數(shù)： | 15/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX RS232 ESD-PROT 32-QFN |
| 產(chǎn)品培訓(xùn)模塊： | Solutions for Industrial Control Applications |
| 標(biāo)準(zhǔn)包裝： | 60 |
| 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 ~ 3.6 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： | 管件 |
ISL3241E, ISL3243E
8
FN6768.2
June 18, 2012
Detailed Description
The ISL324xE operate from a single +2.7V to +3.6V supply,
guarantee a 250kbps minimum data rate, require only four
small external 0.1F capacitors, feature low power
consumption, and meet all ElA RS-232 and V.28 specifications
even with VCC = 3.0V. The circuit is divided into three sections:
The charge pump, the transmitters, and the receivers.
Charge-Pump
Intersil’s new ISL324xE devices utilize regulated on-chip dual
charge pumps as voltage doublers, and voltage inverters to
generate ±5.5V transmitter supplies from a VCC supply as low
as 3.0V. This allows them to maintain RS-232 compliant output
levels over the ±10% tolerance range of 3.3V powered
systems. The efficient on-chip power supplies require only four
small, external 0.1F capacitors for the voltage doubler and
inverter functions. The charge pumps operate discontinuously
(i.e., they turn off as soon as the V+ and V- supplies are
pumped up to the nominal values), resulting in significant
power savings.
Transmitters
The transmitters are proprietary, low dropout, inverting drivers
that translate logic input levels to EIA/TIA-232 output levels.
Coupled with the on-chip ±5.5V supplies, these transmitters
deliver true RS-232 levels over a wide range of single supply
system voltages.
All transmitter outputs disable and assume a high impedance
state when the device enters the power-down mode (see Table
2). These outputs may be driven to F12V when disabled.
The devices guarantee a 250kbps data rate for full load
conditions (3k and 1000pF), VCC ≥ 3.0V, with one transmitter
operating at full speed. Under more typical conditions of VCC ≥
3.3V, RL = 3k and CL = 200pF, one transmitter easily
operates at greater than 1Mbps.
The transmitter input switching threshold is set by the voltage
applied to the VL pin, so tying VL to a voltage lower than VCC
reduces the Tx input VIH and VIL to values compatible with
logic ICs (e.g., UARTs and controllers) powered by the VL
left unconnected (there are no pull-up resistors), and may
cause supply current increases. Connect unused inputs to GND
for the best performance.
Receivers
All the ISL324xE devices contain standard inverting receivers
that three-state via the EN or FORCEOFF control lines.
Additionally, these products include noninverting “monitor”
receivers (denoted by the ROUTB label) that are always active,
regardless of the state of any control lines. All the receivers
convert RS-232 signals to CMOS output levels, swinging
between GND and VL, and accept inputs up to ±25V while
presenting the required 3k to 7k input impedance (see
Schmitt trigger input stage uses hysteresis to increase noise
immunity and decrease errors due to slow input signal
transitions.
The ISL3241E inverting receivers disable only when EN is
driven high. ISL3243E receivers disable during forced (manual)
powerdown, but not during automatic powerdown (see
Table 2).
FIGURE 3A. TEST CIRCUIT
FIGURE 3B. MEASUREMENT POINTS
FIGURE 3. RECEIVER ENABLE AND DISABLE TIMES
Test Circuits and Waveforms (Continued)
PARAMETER
RIN
SW
tPHZ and tPZH
GND
tPLZ and tPZL
VCC
VL
R
EN
RIN
VCC
SIGNAL
GENERATOR
CL
OR
FORCEOFF
ROUT
VL
GND
SW
1k
OR
GND
VL
FORCEON
OR SHDN
ROUT
VL
0V
50%
VOH
0V
50%
VOH - 0.3V
tPHZ
ROUT
VL
VOL
50%
VOL + 0.3V
tPLZ
FORCEOFF
OUTPUT HIGH
OUTPUT LOW
tPZL
tPZH
VL
0V
50%
EN
RXOUT
GND
≤ VROUT ≤ VL
5k
RXIN
-25V
≤ VRIN ≤ +25V
GND
VL
FIGURE 4. INVERTING RECEIVER CONNECTIONS
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ICL3241IBZ | IC 3DRVR/5RCVR RS232 3V 28-SOIC |
| ISL83385EIBZ | IC 2DRVR/2RCVR RS232 18-SOIC |
| MS27656T11F5SA | CONN RCPT 5POS WALL MNT W/SCKT |
| IDT723676L15PF | IC FIFO SYNC 16384X36 128QFP |
| MS27466T11B4PB | CONN RCPT 4POS WALL MT W/PINS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL3241EIRZ-T | 功能描述:IC TXRX RS232 ESD-PROT 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:- 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) |
| ISL32430E | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:?±40V Fault Protected, 3.3V to 5V, ?±15V Common Mode Range, RS-485/RS-422 Transceivers With Cable Invert and ?±15kV ESD |
| ISL32430EIBZ | 功能描述:IC TRANSCEIVER 14-SOIC 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) |
| ISL32430EIBZ-T | 功能描述:IC TRANSCEIVER 14-SOIC 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) |
| ISL32430EIBZ-T7A | 功能描述:RS-422/RS-485 接口 IC 40V OVP 15V CMR -40+ 85 3V RS-485 FL DUP RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。