參數資料
| 型號： | ISL4244EIR-T |
| 廠商： | Intersil |
| 文件頁數： | 11/17頁 |
| 文件大小： | 0K |
| 描述： | IC 3DRVR/5RCVR RS232 3V 32-QFN |
| 標準包裝： | 6,000 |
| 類型： | 收發(fā)器 |
| 驅動器/接收器數： | 3/5 |
| 規(guī)程： | RS232 |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 32-VFQFN 裸露焊盤 |
| 供應商設備封裝： | 32-QFN 裸露焊盤（5x5） |
| 包裝： | 帶卷 (TR) |
3
FN8038.5
May 13, 2010
Pinouts
ISL4238E
(32 LD QFN)
TOP VIEW
ISL4244E, ISL4245E
(32 LD QFN)
TOP VIEW
Pin Descriptions
PIN
FUNCTION
VCC
System power supply input (2.7V to 5.5V).
V+
Internally generated positive transmitter supply (+5.5V).
V-
Internally generated negative transmitter supply (-5.5V).
GND
Ground connection. This is also the potential of the thermal pad (PD).
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. (Note)
TOUT
±15kV ESD Protected
, RS-232 level (nominally ±5.5V) transmitter outputs.
RIN
±15kV ESD Protected
, 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.
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 power-down circuitry thereby keeping transmitters active. (FORCEOFF must be high).
NC
No Connection
PD
Exposed Thermal Pad. Connect to GND.
NOTE: ISL4238E input pins incorporate positive feedback resistors. Once the input is driven to a valid logic level, the feedback resistor maintains
that logic level until VCC is removed. Unused transmitter inputs may be left unconnected by the user.
T1OUT
T2OUT
T3OUT
R1IN
R2IN
T4OUT
R3IN
T1IN
T2IN
T3IN
R1OUT
R2OUT
T4IN
R3OUT
T5OUT
FORCEON
FO
R
C
E
O
F
INV
A
L
ID
NC
T5
IN
R1
OU
T
B
C2-
GND
C2+
C1+
V+
C1-
V
CC
NC
V-
NC
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
32
31
30
29
28
27
26
25
9
1011
12
13
1415
16
NC
PD
R1IN
R2IN
R3IN
R4IN
R5IN
T1OUT
T2OUT
C1-
FORCEON
FORCEOFF
INVALID
R2OUTB
R1OUT
R2OUT
T3OUT
T3
IN
T2
IN
T1
IN
R5
OU
T
R3
OU
T
R4
OU
T
V-
C2-
C2+
C1+
V+
GND
V
CC
NC
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
32
31
30
29
28
27
26
25
9
1011
12
13
1415
16
PD
ISL4238E, ISL4244E, ISL4245E
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