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參數(shù)資料
| 型號： | SP3223UCP |
| 元件分類： | Codec |
| 英文描述： | Surround-Sound CODEC IC; IC Function:Surround-Sound CODEC IC; Package/Case:64-LQFP; IC Generic Number:CS42416; Leaded Process Compatible:No; No. of Bits:24; No. of Channels:6; Operating Temp. Max:70 C; Operating Temp. Min:-10 C RoHS Compliant: Yes |
| 中文描述： | 高速智能3.0V至5.5V的RS - 232收發(fā)器 |
| 文件頁數(shù)： | 11/24頁 |
| 文件大小： | 288K |
| 代理商： | SP3223UCP |
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
11
Copyright 2004 Sipex Corporation
Figure 17 shows a loopback test circuit used to
test the RS-232 Drivers. Figure 18 shows the test
results where one driver was active at 1Mbps and
all three drivers loaded with an RS-232 receiver
in parallel with a 250pF capacitor. Figure 19
shows the test results of the loopback circuit with
all drivers active at 250kbps with typical
RS-232 loads in parallel with 1000pF capacitors. A
superior RS-232 data transmission rate of 1Mbps
makes the SP3223U/3243U series an ideal match
Table 2. SHUTDOWN and EN Truth Tables
Note: In AUTO ON-LINE
Mode where ONLINE =
GND and SHUTDOWN = V
, the device will shut down
if there is no activity present at the Receiver inputs.
Figure 17. Loopback Test Circuit for RS-232 Driver
Data Transmission Rates
for high speed LAN and personal computer
peripheral applications.
Receivers
The receivers convert +5.0V EIA/TIA-232
levels to TTL or CMOS logic output levels. The
SP3223U receivers have an inverting output that
can be disabled by using the EN pin.
Figure 18. Loopback Test results at 1Mbps
Figure 19. Loopback Test results at 250Kbps
U
3
2
2
3
P
S
:
E
C
I
V
E
D
N
W
O
D
T
U
H
S
N
E
T
X
T
U
O
R
X
T
U
O
0
0
Z
h
g
H
e
v
A
0
1
Z
h
g
H
Z
h
g
H
1
0
e
v
A
e
v
A
1
1
e
v
A
Z
h
g
H
U
3
4
2
3
P
S
:
E
C
I
V
E
D
N
W
O
D
T
U
H
S
T
X
T
U
O
R
X
T
U
O
R
2
T
U
O
0
Z
h
g
H
Z
h
g
H
e
v
A
1
e
v
A
e
v
A
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v
A
SP3223U
GND
T
1
IN
T
X
IN
C1+
C1-
C2+
C2-
V+
V-
V
CC
0.1
μ
F
0.1
μ
F
0.1
μ
F
+
C2
C5
C1
+
+
C3
C4
+
+
0.1
μ
F
0.1
μ
F
TTINPUTS
+3V to +5V
SHUTDOWN
5k
R
1
OUT
5k
R
X
IN
R
X
OUT
OUTPUTS
EN *
ONLINE
R
1
IN
T
X
OUT
T
1
OUT
STATUS
V
CC
μ
P Supervisor
To
1000pF
1000pF
*
SP3223EU Only
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