参数资料
| 型号： | ISL41387IRZ-T |
| 厂商： | Intersil |
| 文件页数： | 10/27页 |
| 文件大小： | 0K |
| 描述： | IC TXRX DUAL PROTOCAL ESD 40-QFN |
| 产品培训模块： | Solutions for Industrial Control Applications |
| 标准包装： | 1 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 2/2 |
| 规程： | RS232，RS422，RS485 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-VFQFN 裸露焊盘 |
| 供应商设备封装： | 40-QFN 裸露焊盘（6x6） |
| 包装： | 标准包装 |
| 其它名称： | ISL41387IRZ-TDKR |
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18
FN6201.3
November 21, 2007
minimize EMI and reflections. Nevertheless, for the best jitter
performance when driving long cables, the faster speed
options may be preferable, even at lower data rates. The
faster output transitions deliver less variability (jitter) when
loaded with the large capacitance associated with long
the three speed options while driving three different cable
lengths. The figures show that under all conditions the faster
the edge rate, the better the jitter performance. Of course,
faster transitions require more attention to ensuring short
stub lengths, and quality terminations, so there are trade-offs
to be made. Assuming a jitter budget of 10%, it is likely
better to go with the slow speed option for data rates of
115kbps or less, to minimize fast edge effects. Likewise, the
medium speed option is a good choice for data rates
between 115kbps and 460kbps. For higher data rates, or
when the absolute best jitter is required, use the high speed
option.
Evaluation Board
An evaluation board, part number ISL41387EVAL1, is
available to assist in assessing the dual protocol IC’s
performance. The evaluation board contains a QFN
packaged device, but because the same die is used in all
packages, the board is also useful for evaluating the
functionality of the other versions. The board’s design allows
for evaluation of all standard features, plus the QFN specific
features. Refer to the evaluation board application note for
details and contact your sales rep for ordering information.
FIGURE 12. USING ACTIVE LOW vs ACTIVE HIGH RX
ENABLE
0.1F
+
D
R
VCC
GND
RA
RXEN
DEN
DY
+5V
ISL41387
Tx/Rx
ACTIVE HIGH RX ENABLE
0.1F
+
D
R
VCC
GND
RA
RXEN *
DEN
DY
+5V
ISL41387
Tx/Rx
* QFN ONLY
ACTIVE LOW RX ENABLE
RXEN
1k
Ω
OR NC
RXEN *
Y
Z
A
B
Y
Z
A
B
Typical Performance Curves VCC = VL = 5V, TA = +25°C; Unless Otherwise Specified.
FIGURE 13. RECEIVER OUTPUT CURRENT vs RECEIVER
OUTPUT VOLTAGE
FIGURE 14. RECEIVER HIGH OUTPUT VOLTAGE vs LOGIC
SUPPLY VOLTAGE (VL)
0123
45
0
10
20
30
40
50
RECEIVER OUTPUT VOLTAGE (V)
RECEIVE
R
OU
TP
U
T
CURRENT
(mA)
VOH, +25°C
VOH, +85°C
VOL, +25°C
VOL, +85°C
VL (V)
HI
GH
OUT
P
UT
V
O
L
T
A
G
E
(
V
)
0123
45
0
1
2
3
4
5
IOH = -1mA
IOH = -4mA
IOH = -8mA
ISL81387, ISL41387
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