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参数资料
| 型号： | SP3243ECY-L/TR |
| 厂商： | Exar Corporation |
| 文件页数： | 21/24页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS232 INTELLIGNT 28TSSOP |
| 产品变化通告： | Packaging Change 15/Jul/2010 |
| 标准包装： | 1,500 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 3/5 |
| 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-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 28-TSSOP |
| 包装： | 带卷 (TR) |
6
Exar Corporation 48720 Kato Road, Fremont CA, 94538 510-668-7017 www.exar.com
SP3243E_102_060611
Table 1. Device Pin Description
PIN NUMBER
NAME
FUNCTION
SP3243E
SP3243EUCR
QFN
C1+
Positive terminal of the voltage doubler charge-pump capacitor
28
V+
Regulated +5.5V output generated by the charge pump
27
26
C1-
Negative terminal of the voltage doubler charge-pump capacitor
24
22
C2+
Positive terminal of the inverting charge-pump capacitor
1
29
C2-
Negative terminal of the inverting charge-pump capacitor
2
31
V-
Regulated -5.5V output generated by the charge pump
3
32
R
1IN
RS-232 receiver input.
4
2
R
2IN
RS-232 receiver input
5
3
R
3IN
RS-232 receiver input
6
4
R
4IN
RS-232 receiver input
7
5
R
5IN
RS-232 receiver input
8
6
R
1OUT
TTL/CMOS receiver output
19
17
R
2OUT
TTL/CMOS receiver output
18
16
R
2OUT
Non-inverting receiver-2 output, active in shutdown
20
18
R
3OUT
TTL/CMOS receiver output
17
15
R
4OUT
TTL/CMOS receiver output
16
14
R
5OUT
TTL/CMOS receiver output
15
13
STATUS
TTL/CMOS Output indicating online and shutdown status
21
19
T
1IN
TTL/CMOS driver input
14
12
T
2IN
TTL/CMOS driver input
13
11
T
3IN
TTL/CMOS driver input
12
10
ONLINE
Apply logic HIGH to override AUTO ON-LINE circuitry
keeping drivers acive (SHUTDOWN must also be logic
HIGH, refer to Table 2)
23
21
T1
OUT
RS-232 driver output
9
7
T2
OUT
RS-232 driver output
10
8
T3
OUT
RS-232 driver output
11
9
GND
Ground
25
23
V
CC
+3.0V to +5.5V supply voltage
26
25
SHUTDOWN Apply logic LOW to SHUTDOWN driver and charge pump.
This overrides all AUTO ON-LINE circuitry and ONLINE
(Refer to table 2)
22
20
NC
No Connection
-
1,24,27,30
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