参数资料
| 型号： | ICL3232EIV-20Z |
| 厂商： | Intersil |
| 文件页数： | 9/33页 |
| 文件大小： | 0K |
| 描述： | IC 2DRVR/2RCVR RS232 3V 20-TSSOP |
| 标准包装： | 740 |
| 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： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-TSSOP |
| 包装： | 管件 |
第1页第2页第3页第4页第5页第6页第7页第8页当前第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页第29页第30页第31页第32页第33页
17
FN4910.21
February 22, 2010
With any of the control schemes, the time required to
exit power-down, and resume transmission is only
100s. A mouse, or other application, may need more
time to wake up from shutdown. If automatic
power-down is being utilized, the RS-232 device will
reenter power-down if valid receiver levels aren’t
reestablished within 30s of the ICL32xxE powering up.
Figure 5 illustrates a circuit that keeps the ICL32xxE from
initiating automatic power-down for 100ms after
powering up. This gives the slow-to-wake peripheral
circuit time to reestablish valid RS-232 output levels.
Automatic Power-Down
(ICL3221E, ICL3223E, ICL3243E Only)
Even greater power savings is available by using the
devices which feature an automatic power-down
function. When no valid RS-232 voltages (see Figure 6)
are sensed on any receiver input for 30s, the charge
pump and transmitters power-down, thereby reducing
supply current to 1A. Invalid receiver levels occur
whenever the driving peripheral’s outputs are shut off
(powered down) or when the RS-232 interface cable is
disconnected. The ICL32xxE powers back up whenever it
detects a valid RS-232 voltage level on any receiver
input. This automatic power-down feature provides
additional system power savings without changes to the
existing operating system.
Automatic power-down operates when the FORCEON
input is low, and the FORCEOFF input is high. Tying
FORCEON high disables automatic power-down, but
manual power-down is always available via the
overriding FORCEOFF input. Table 2 summarizes the
automatic power-down functionality.
FIGURE 3. DISABLED RECEIVERS PREVENT POWER
DRAIN
ICL324XE
TRANSITION
RX
TX
R2OUTB
R2OUT
T1IN
FORCEOFF = GND
VCC
TO
R2IN
T1OUT
VOUT = HI-Z
POWERED
OR SHDN = GND, EN = VCC
DETECTOR
DOWN
UART
WAKE-UP
LOGIC
FIGURE 4. CONNECTIONS FOR MANUAL
POWER-DOWN WHEN NO VALID
RECEIVER SIGNALS ARE PRESENT
PWR
FORCEOFF
INVALID
CPU
I/O
FORCEON
ICL3221E,
MGT
LOGIC
UART
ICL3243E
ICL3223E,
FIGURE 5. CIRCUIT TO PREVENT AUTO
POWER-DOWN FOR 100ms AFTER
FORCED POWER-UP
ICL3221E, ICL3223E, ICL3243E
FORCEOFF
FORCEON
POWER
MASTER POWER-DOWN LINE
1M
0.1F
MANAGEMENT
UNIT
FIGURE 6. DEFINITION OF VALID RS-232 RECEIVER
LEVELS
0.3V
-0.3V
-2.7V
2.7V
INVALID LEVEL - POWER-DOWN OCCURS AFTER 30s
VALID RS-232 LEVEL - ICL32xxE IS ACTIVE
INDETERMINATE - POWER-DOWN MAY OR
MAY NOT OCCUR
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1248BCEE+ | IC ADC 10BIT SERIAL 16-QSOP |
| IDT72281L15PFI8 | IC FIFO 32768X18 LP 15NS 64QFP |
| MS27467E21B41SB | CONN PLUG 41POS STRAIGHT W/SCKT |
| IDT72281L10PF8 | IC FIFO 32768X18 LP 10NS 64QFP |
| V150B24M250BG3 | CONVERTER MOD DC/DC 24V 250W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ICL3232EIV-20ZT | 功能描述:RS-232接口集成电路 RS232 3V 2D/2R 15KV INDEL 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: |
| ICL3232EIV-20Z-T | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:+,-15kV ESD Protected, +3V to +5.5V, 1Microamp, 250kbps, RS-232 Transmitters/Receivers |
| ICL3232IA | 功能描述:IC 2DRVR/2RCVR RS232 3V 16-SSOP 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) |
| ICL3232IA-T | 功能描述:IC 2DRVR/2RCVR RS232 3V 16-SSOP 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) |
| ICL3232IAZ | 功能描述:RS-232接口集成电路 RS232 3V 2D/2R 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: |
发布紧急采购，3分钟左右您将得到回复。