參數(shù)資料
型號(hào)： SP495CT
英文描述： Quad Differential RS-485 Transceiver
中文描述： 四路差分的RS - 485收發(fā)器
文件頁(yè)數(shù)： 2/6頁(yè)
文件大?。?/td> 60K
代理商： SP495CT
SP495
Quad Differential RS-485 Transceiver
2
Copyright 2000 Sipex Corporation
SPECIFICATIONS
T
MIN
to T
MAX
and V
CC
= 5V
±
5% unless otherwise noted.
PARAMETERS
DRIVER
DC Characteristics
Differential Output Voltage
Differential Output Voltage
MIN.
TYP.
MAX.
UNITS
CONDITIONS
GND
2
V
CC
V
CC
Volts
Volts
Unloaded; R =
∞
; see Figure 1
With Load; R = 50
; (RS-422);
see Figure 1
With Load; R = 27
; (RS-485); see Figure 1
Differential Output Voltage
Change in Magnitude of Driver
Differential Output Voltage for
1.5
V
CC
Volts
Complimentary States
Driver Common-Mode
Output Voltage
Input High Voltage
Input Low Voltage
Input Current
Driver Short-Circuit Current
V
OUT
= HIGH
V
OUT
= LOW
0.2
Volts
R = 27
or R = 50
; see Figure 1
3
Volts
Volts
Volts
μ
A
R = 27
or R = 50
; see Figure 1
Applies to DRx, DEx/ REx
Applies to DRx, DEx/ REx
Applies to DRx, DEx/ REx
2.0
0.8
±
10
±
250
±
250
mA
mA
-7V
≤
V
O
≤
10V
-7V
≤
V
O
≤
10V
DRIVER
AC Characteristics
Maximum Driver Data Rate
Driver Input to Output
10
20
Mbps
ns
R
DIFF
= 54
, C
L1
= C
L2
= 100pF
t
; R
= 54
, C
= C
L2
= 100pF;
see Figures 3 and 6
t
; R
= 54
, C
= C
L2
= 100pF;
see Figures 3 and 6
see Figures 3 and 6
30
60
Driver Input to Output
20
30
60
ns
Driver Skew
10
ns
Driver Rise or Fall Time
3
15
40
ns
From 10% to 90%; R
= 54
,
C
L1
= C
L2
= 100pF; see Figures 3 and 6
C
= C
= 100pF; see Figures
4 and 7; S
closed
C
= C
= 100pF; see Figures
4 and 7; S
closed
C
= C
= 15pF; see Figures
4 and 7; S
1
closed
C
= C
= 15pF; see Figures
4 and 7; S
2
closed
Driver Enable to Output HIGH
40
70
ns
Driver Enable to Output LOW
40
70
ns
Driver Disable Time from LOW
40
70
ns
Driver Disable Time from HIGH
40
70
ns
RECEIVER
DC Characteristics
Differential Input Threshold
Input Hysteresis
Output Voltage HIGH
-0.2
+0.2
Volts
mV
Volts
-7V
≤
V
CM
≤
12V
V
CM
= 0V
I
O
ID
= +200mV
70
3.5
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of the device at
these ratings or any other above those indicated in the operation sections
of the specifications below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may affect reliability.
V
............................................................................................................................+7V
Input Voltages
Logic...................................................-0.5V to (V
CC
+0.5V)
Drivers................................................-0.5V to (V
+0.5V)
Receivers....................................................................15V
Output Voltages
Logic...................................................-0.5V to (V
+0.5V)
Drivers...........................................................-8V to 12.5V
Receivers...........................................-0.5V to (V
+0.5V)
Storage Temperature....................................................-65C to +150C
Power Dissipation.....................................................................1000mW
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