参数资料
| 型号： | ICL3237CAZ-T |
| 厂商： | Intersil |
| 文件页数： | 9/11页 |
| 文件大小： | 0K |
| 描述： | IC 5DRVR/3RCVR RS232 3V 28-SSOP |
| 标准包装： | 1,000 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 5/3 |
| 规程： | RS232 |
| 电源电压： | 3 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 28-SSOP |
| 包装： | 带卷 (TR) |
7
Receiver ENABLE Control
This device also features an EN input to control the receiver
outputs. Driving EN high disables all the inverting (standard)
receiver outputs placing them in a high impedance state.
This is useful to eliminate supply current, due to a receiver
output forward biasing the protection diode, when driving the
input of a powered down (VCC = GND) peripheral (see
Figure 2). The enable input has no effect on transmitter nor
monitor (ROUTB) outputs.
MegaBaud Selection
In normal operating mode (MBAUD = GND), the ICL3237
transmitters guarantee a 250kbps data rate with worst-case
loads of 3k
in parallel with 1000pF. This provides
compatibility with PC-to-PC communication software, such
as Laplink.
For higher speed serial communications, the ICL3237
features MegaBaud operation. In MegaBaud operating
mode (MBAUD = VCC), the ICL3237 transmitters guarantee
a 1Mbps data rate with worst-case loads of 3k
in parallel
with 250pF for 3.0V < VCC < 4.5V. For 5V ±10% operation,
the ICL3237 transmitters guarantee a 1Mbps data rate into
worst-case loads of 3k
in parallel with 1000pF.
Capacitor Selection
The charge pumps require 0.1
F capacitors for 3.3V
operation. For other supply voltages refer to Table 3 for
capacitor values. Do not use values smaller than those listed
in Table 3. Increasing the capacitor values (by a factor of 2)
reduces ripple on the transmitter outputs and slightly
reduces power consumption. C2, C3, and C4 can be
increased without increasing C1’s value, however, do not
increase C1 without also increasing C2, C3, and C4 to
maintain the proper ratios (C1 to the other capacitors).
When using minimum required capacitor values, make sure
that capacitor values do not degrade excessively with
temperature. If in doubt, use capacitors with a larger nominal
value. The capacitor’s equivalent series resistance (ESR)
usually rises at low temperatures and it influences the
amount of ripple on V+ and V-.
Power Supply Decoupling
In most circumstances a 0.1
F bypass capacitor is
adequate. In applications that are particularly sensitive to
power supply noise, decouple VCC to ground with a
capacitor of the same value as the charge-pump capacitor C1.
Connect the bypass capacitor as close as possible to the IC.
Transmitter Outputs when Exiting
Powerdown
Figure 4 shows the response of two transmitter outputs
when exiting powerdown mode. As they activate, the two
transmitter outputs properly go to opposite RS-232 levels,
with no glitching, ringing, nor undesirable transients. Each
transmitter is loaded with 3k
in parallel with 2500pF. Note
that the transmitters enable only when the magnitude of the
supplies exceed approximately 3V.
High Data Rates
The ICL3237 maintains the RS-232 ±5V minimum
transmitter output voltages even at high data rates. Figure 5
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
FIGURE 3. DISABLED RECEIVERS PREVENT POWER DRAIN
ICL3237
TRANSITION
RX
TX
R1OUTB
R1OUT
T1IN
VCC
TO
R1IN
T1OUT
VOUT = HI-Z
POWERED
SHDN = GND, EN = VCC
DETECTOR
DOWN
UART
WAKE-UP
LOGIC
TABLE 3. REQUIRED CAPACITOR VALUES
VCC (V)
C1 (F)
C2, C3, C4 (F)
3.0 to 3.6
0.22
3.15 to 3.6
0.1
4.5 to 5.5
0.047
0.33
3.0 to 5.5
0.22
1.0
ICL3237
Laplink is a registered trademark of Traveling Software.
相关PDF资料 |
PDF描述 |
|---|---|
| ICL3207IAZ-T | IC 5DRVR/3RCVR RS232 3V 24-SSOP |
| VI-2WX-MX-F3 | CONVERTER MOD DC/DC 5.2V 75W |
| ISL3172EIUZ-T | TXRX ESD 3.3V RS-485/422 8-MSOP |
| MS3101E22-34S | CONN RCPT 5POS FREE HNG W/SCKT |
| IDT72V273L6PF | IC FIFO 16384X18 6NS 80QFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ICL3237E | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:+-15kV ESD Protected, 10nA Supply- Current, +3V to +5.5V, 250k/1Mbps, RS-232 Transmitters/Receivers |
| ICL3237ECA | 功能描述:IC 5DRVR/3RCVR RS232 3V 28-SSOP 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 |
| ICL3237ECA-T | 功能描述:IC 5DRVR/3RCVR RS232 3V 28-SSOP 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 |
| ICL3237ECAZ | 功能描述:RS-232接口集成电路 RS232 3V 5D/3R 15KV SHTDWN 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: |
| ICL3237ECAZ-T | 功能描述:RS-232接口集成电路 RS232 3V 5D/3R 15KV SHTDWN 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: |
发布紧急采购，3分钟左右您将得到回复。