參數資料
| 型號： | ICL3232ECB |
| 廠商： | Intersil |
| 文件頁數： | 9/33頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC 2DRVR/2RCVR RS232 3V 16-SOIC |
| 標準包裝： | 48 |
| 類型： | 收發(fā)器 |
| 驅動器/接收器數： | 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-SOIC（0.295"，7.50mm 寬） |
| 供應商設備封裝： | 16-SOIC |
| 包裝： | 管件 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁當前第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁
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
相關PDF資料 |
PDF描述 |
|---|---|
| ICL3232ECA-T | IC 2DRVR/2RCVR RS232 3V 16-SSOP |
| ICL3232ECA | IC 2DRVR/2RCVR RS232 3V 16-SSOP |
| VE-2W2-MX-F2 | CONVERTER MOD DC/DC 15V 75W |
| MS3452W20-14PX | CONN RCPT 5POS BOX MNT W/PINS |
| ICL3232CV-T | IC 2DRVR/2RCVR RS232 3V 16-TSSOP |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ICL3232ECBN | 功能描述:IC TXRX RS-232 3-5.5V ESD 16SOIC RoHS:否 類別:集成電路 (IC) >> 接口 - 驅動器，接收器，收發(fā)器 系列:- 標準包裝:1,000 系列:- 類型:收發(fā)器 驅動器/接收器數: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-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:16-SOIC 包裝:帶卷 (TR) |
| ICL3232ECBN-T | 功能描述:IC 2DRVR/2RCVR RS232 3V 16-SOIC RoHS:否 類別:集成電路 (IC) >> 接口 - 驅動器，接收器，收發(fā)器 系列:- 標準包裝:1,000 系列:- 類型:收發(fā)器 驅動器/接收器數: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-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:16-SOIC 包裝:帶卷 (TR) |
| ICL3232ECBNZ | 功能描述:RS-232接口集成電路 HI-ESD 15KV RS232 3V 2D/2R 16 N COM RoHS:否 制造商:Exar 數據速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| ICL3232ECBNZ-T | 功能描述:RS-232接口集成電路 HI-ESD 15KV RS232 3V 2D/2R 16 N COM RoHS:否 制造商:Exar 數據速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| ICL3232ECBNZ-T7A | 功能描述:RS-232接口集成電路 HI-ESD 15KV RS232 3V 2D/2R 16 N COM RoHS:否 制造商:Exar 數據速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
發(fā)布緊急采購，3分鐘左右您將得到回復。