FN4878.8 February 27, 2006 Pin Descriptions PIN FUNCTION VCC System power supply input (3.0V to 5" />
參數(shù)資料
型號: ICL3225IA
廠商: Intersil
文件頁數(shù): 12/18頁
文件大?。?/td> 0K
描述: IC 2DRVR/2RCVR RS232 3V 20-SSOP
標準包裝: 66
類型: 收發(fā)器
驅(qū)動器/接收器數(shù): 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: 20-SSOP(0.209",5.30mm 寬)
供應商設(shè)備封裝: 20-SSOP
包裝: 管件
3
FN4878.8
February 27, 2006
Pin Descriptions
PIN
FUNCTION
VCC
System power supply input (3.0V to 5.5V).
V+
Internally generated positive transmitter supply (+5.5V).
V-
Internally generated negative transmitter supply (-5.5V).
GND
Ground connection.
C1+
External capacitor (voltage doubler) is connected to this lead.
C1-
External capacitor (voltage doubler) is connected to this lead.
C2+
External capacitor (voltage inverter) is connected to this lead.
C2-
External capacitor (voltage inverter) is connected to this lead.
TIN
TTL/CMOS compatible transmitter Inputs.
TOUT
RS-232 level (nominally
±5.5V) transmitter outputs.
RIN
RS-232 compatible receiver inputs.
ROUT
TTL/CMOS level receiver outputs.
ROUTB
TTL/CMOS level, noninverting, always enabled receiver outputs.
INVALID
Active low output that indicates if no valid RS-232 levels are present on any receiver input.
READY
Active high output that indicates when the ICL32XXE is ready to transmit (i.e., V-
≤ -4V)
FORCEOFF Active low to shut down transmitters and on-chip power supply. This overrides any automatic circuitry and FORCEON (see Table 2).
FORCEON
Active high input to override automatic powerdown circuitry thereby keeping transmitters active. (FORCEOFF must be high).
Typical Operating Circuits
ICL3225
19
VCC
T1OUT
T2OUT
T1IN
T2IN
T1
T2
0.1
F
+
0.1
F
+
0.1
F
13
12
17
8
2
4
3
7
V+
V-
C1+
C1-
C2+
C2-
+
0.1
F
5
6
R1OUT
R1IN
16
5k
R2OUT
R2IN
9
10
5k
15
C1
C2
+ C3
C4
READY
1
GND
+3.3V
+
0.1
F
18
TTL/CMOS
LOGIC LEVELS
RS-232
LEVELS
R1
R2
FORCEON
FORCEOFF
14
20
VCC
11
INVALID
TO POWER
CONTROL LOGIC
ICL3225, ICL3245
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