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TRSF3238IDWR PDF预览

TRSF3238IDWR

更新时间: 2024-11-20 12:16:23
品牌 Logo 应用领域
德州仪器 - TI 驱动器
页数 文件大小 规格书
17页 270K
描述
3-V TO 5.5-V MULTICHANNEL RS-232 COMPATIBLE LINE DRIVER/RECEIVER

TRSF3238IDWR 数据手册

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TRSF3238  
3-V TO 5.5-V MULTICHANNEL RS-232 COMPATIBLE LINE DRIVER/RECEIVER  
www.ti.com  
SLLS859AUGUST 2007  
FEATURES  
DB, DW, OR PW PACKAGE  
(TOP VIEW)  
Auto-Powerdown Plus  
Operates With 3-V to 5.5-V VCC Supply  
C2+  
GND  
C2−  
C1+  
27 V+  
26  
1
28  
Always-Active Noninverting Receiver Output  
(ROUT1B)  
2
3
V
CC  
Supports Operation From 250 kbit/s to  
1 Mbit/s  
V−  
4
25 C1−  
DOUT1  
DOUT2  
DOUT3  
RIN1  
5
24 DIN1  
Low Standby Current . . . 1 μA Typical  
External Capacitors . . . 4 × 0.1 μF  
Accepts 5-V Logic Input With 3.3-V Supply  
Inter-Operable With TRSF3243  
6
23  
22  
21  
20  
19  
18  
17  
16  
15  
DIN2  
7
DIN3  
8
ROUT1  
ROUT2  
DIN4  
9
RIN2  
DOUT4  
RIN3  
10  
11  
12  
13  
14  
RS-232 Bus-Pin ESD Protection Exceeds  
ROUT3  
DIN5  
±15 kV Using Human-Body Model (HBM)  
DOUT5  
FORCEON  
FORCEOFF  
ROUT1B  
INVALID  
APPLICATIONS  
Battery-Powered Systems  
PDAs  
Notebooks  
Subnotebooks  
Laptops  
Palmtop PCs  
Hand-Held Equipment  
Modems  
Printers  
DESCRIPTION/ORDERING INFORMATION  
The TRSF3238 device consists of five line drivers, three line receivers, and a dual charge-pump circuit with  
±15-kV ESD protection pin to pin (serial-port connection pins, including GND). The charge pump and four small  
external capacitors allow operation from a single 3-V to 5.5-V supply. In addition, this device includes an  
always-active noninverting output (ROUT1B), which allows applications using the ring indicator to transmit data  
while the device is powered down. This device operates at data signaling rate up to 1 Mbit/s and at an increased  
slew-rate range of 24 V/μs to 150 V/μs.  
Flexible control options for power management are featured when the serial port and driver inputs are inactive.  
The auto-powerdown plus feature functions when FORCEON is low and FORCEOFF is high. During this mode  
of operation, if the device does not sense valid signal transitions on all receiver and driver inputs for  
approximately 30 s, the built-in charge pump and drivers are powered down, reducing the supply current to  
1 μA. By disconnecting the serial port or placing the peripheral drivers off, auto-powerdown plus occurs if there  
is no activity in the logic levels for the driver inputs. Auto-powerdown plus can be disabled when FORCEON and  
FORCEOFF are high. With auto-powerdown plus enabled, the device automatically activates when a valid signal  
is applied to any receiver or driver input. INVALID is high (valid data) if any receiver input voltage is greater than  
2.7 V or less than –2.7 V, or has been between –0.3 V and 0.3 V for less than 30 μs. INVALID is low (invalid  
data) if all receiver input voltages are between –0.3 V and 0.3 V for more than 30 μs. Refer to Figure 5 for  
receiver input levels.  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date.  
Copyright © 2007, Texas Instruments Incorporated  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  

TRSF3238IDWR 替代型号

型号 品牌 替代类型 描述 数据表
TRSF3238EIDWR TI

完全替代

3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/

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