- 您现在的位置：买卖IC网 > PDF目录10532 > ICL3232CBZ (Intersil)IC 2DRVR/2RCVR RS232 3V 16-SOIC PDF资料下载
参数资料
| 型号： | ICL3232CBZ |
| 厂商： | Intersil |
| 文件页数： | 2/28页 |
| 文件大小： | 0K |
| 描述： | IC 2DRVR/2RCVR RS232 3V 16-SOIC |
| 标准包装： | 48 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 2/2 |
| 规程： | RS232 |
| 电源电压： | 3 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 管件 |
第1页当前第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页
10
FN4805.21
March 1, 2006
Detailed Description
ICL32XX interface ICs operate from a single +3V to +5.5V
supply, guarantee a 250kbps minimum data rate, require
only four small external 0.1
F capacitors, feature low power
consumption, and meet all ElA RS-232C and V.28
specifications. The circuit is divided into three sections:
charge pump, transmitters and receivers.
Charge-Pump
Intersil’s new ICL32XX family utilizes 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 these devices 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 0.1
F capacitors for the
voltage doubler and inverter functions at VCC = 3.3V. See
the Capacitor Selection section, and Table 3 for capacitor
recommendations for other operating conditions. 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 TTL/CMOS inputs 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.
Except for the ICL3232, all transmitter outputs disable and
assume a high impedance state when the device enters the
powerdown mode (See Table 2). These outputs may be
driven to
±12V when disabled.
All 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 = 250pF, one
transmitter easily operates at 900kbps.
Transmitter inputs float if left unconnected, and may cause
ICC increases. Connect unused inputs to GND for the best
performance.
Receivers
All the ICL32XX devices contain standard inverting receivers
that three-state (except for the ICL3232) via the EN or
FORCEOFF control lines. Additionally, the two ICL324X
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 and accept inputs up to
±25V
while presenting the required 3k
to 7k input impedance
receivers’ Schmitt trigger input stage uses hysteresis to
increase noise immunity and decrease errors due to slow
input signal transitions.
The ICL3221/22/23/41 inverting receivers disable only when
EN is driven high. ICL3243 receivers disable during forced
(manual) powerdown, but not during automatic powerdown
(See Table 2).
ICL324X monitor receivers remain active even during
manual powerdown and forced receiver disable, 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
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
powerdown 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.
Pin Compatible Replacements For 5V Devices
The ICL3221/22/32 are pin compatible with existing 5V
RS-232 transceivers - see the Features section on the front
page for details.
This pin compatibility coupled with the low Icc and wide
operating supply range, make the ICL32XX potential lower
power, higher performance drop-in replacements for existing
5V applications. As long as the
±5V RS-232 output swings
are acceptable, and transmitter input pull-up resistors aren’t
required, the ICL32XX should work in most 5V applications.
When replacing a device in an existing 5V application, it is
acceptable to terminate C3 to VCC as shown on the Typical
Operating Circuit. Nevertheless, terminate C3 to GND if
possible, as slightly better performance results from this
configuration.
Powerdown Functionality (Except ICL3232)
The already low current requirement drops significantly
when the device enters powerdown mode. In powerdown,
supply current drops to 1
A, 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 may or may not disable in powerdown; refer to
Table 2 for details. This micro-power mode makes these
devices ideal for battery powered and portable applications.
RXOUT
GND
≤ VROUT ≤ VCC
5k
RXIN
-25V
≤ VRIN ≤ +25V
GND
VCC
FIGURE 1. INVERTING RECEIVER CONNECTIONS
ICL3221, ICL3222, ICL3223, ICL3232, ICL3241, ICL3243
相关PDF资料 |
PDF描述 |
|---|---|
| VI-BT1-MX-F4 | CONVERTER MOD DC/DC 12V 75W |
| VI-BT1-MX-F3 | CONVERTER MOD DC/DC 12V 75W |
| VE-J63-MY-F4 | CONVERTER MOD DC/DC 24V 50W |
| VE-J62-MY-F4 | CONVERTER MOD DC/DC 15V 50W |
| LTC1276BCSW#PBF | IC A/D CONV 12BIT SAMPLNG 24SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ICL3232CBZ-T | 功能描述:RS-232接口集成电路 RS232 3V 2D/2R 16 COMEL 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: |
| ICL3232CP | 功能描述:IC TXRX RS-232 3-5.5V 16-DIP 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:1,000 系列:- 类型:收发器 驱动器/接收器数:2/2 规程:RS232 电源电压:3 V ~ 5.5 V 安装类型:表面贴装 封装/外壳:16-SOIC（0.295"，7.50mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) |
| ICL3232CPZ | 功能描述:RS-232接口集成电路 W/ANNEAL RS232 3V 2D /2R COM 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: |
| ICL3232CV | 功能描述:IC 2DRVR/2RCVR RS232 3V 16-TSSOP 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:1,000 系列:- 类型:收发器 驱动器/接收器数:2/2 规程:RS232 电源电压:3 V ~ 5.5 V 安装类型:表面贴装 封装/外壳:16-SOIC（0.295"，7.50mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) |
| ICL3232CV-20 | 制造商:Intersil Corporation 功能描述: |
发布紧急采购，3分钟左右您将得到回复。