■+5V Only
■Low Power BiCMOS
■Driver/Receiver Enable for Multi-Drop configurations
形容优雅的成语■Low Power Shutdown Mode (SP481E )
■Enhanced ESD Specifications:DESCRIPTION
The SP481E and the SP485E are a family of half-duplex transceivers that meet the specifications of RS-485 and RS-422 rial protocols with enhanced ESD performance. The ESD tolerance has been improved on the devices to over +15KV for both Human Body Model and IEC1000-4-2 Air Discharge Method. The devices are pin-to-pin compatible with Sipex's SP481 and SP485 devices as well as popular industry standards. As with the original versions, the SP481E and the SP485E fe
ature Sipex's BiCMOS design allowing low power operation without sacrificing performance. The SP481E and SP485E meet the requirements of the RS-485 and RS-422 protocols up to 10Mbps under load. The SP481E is equipped with a low power Shutdown mode.
+15KV Human Body Model
新学期计划作文+15KV IEC1000-4-2 Air Discharge +8KV IEC1000-4-2 Contact Discharge
ABSOLUTE MAXIMUM RATINGS
The are stress ratings only and functional operation of the device at the ratings or any other above tho indicated in the operation ctions of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.V CC ............................................................................................................+7V Input Voltages
<-0.3V to (V CC +0.-0.3V to (V CC +0.5V)Receivers.. (15)
SPECIFICATIONS
T MIN to T MAX and V CC = 5V ± 5% unless otherwi noted.
凉拌鸡的做法PARAMETERS
MIN.TYP.MAX.UNITS CONDITIONS
SP481E/SP485E DRIVER DC Characteristics
Differential Output Voltage GND V CC Volts Unloaded; R = ∞; e Figure 1Differential Output Voltage 2V CC Volts with load; R = 50Ω; (RS-422);e Figure 1
Differential Output Voltage 1.5
V CC Volts with load; R = 27Ω; (RS-485);e Figure 1Change in Magnitude of Driver Differential Output Voltage for Complimentary States 0.2Volts R = 27Ω or R = 50Ω; e Figure 1Driver Common-Mode Output Voltage 3
Volts R = 27Ω or R = 50Ω; e Figure 1Input High Voltage 2.0
Volts Applies to DE, DI, RE Input Low Voltage 0.8Volts Applies to DE, DI, RE Input Current
±10µA Applies to DE, DI, RE Driver Short-Circuit Current V OUT = HIGH ±250mA -7V ≤ V O ≤ +12V V OUT = LOW
±250
mA
-7V ≤ V O ≤ +12V
SP481E/SP485E DRIVER AC Characteristics Maximum Data Rate 10Mbps RE = 5V, DE = 5V; R DIFF = 54Ω,C L1 = C L2 = 100pF
Driver Input to Output 203060ns t PLH ; R DIFF = 54Ω, C L1 = C L2 = 100pF;e Figures 3 and 5
Driver Input to Output 203080ns t PLH ; R DIFF = 54Ω, C LI = C L2 = 100pF;(SP485EMN ONLY)See Figures 3 and 5
Driver Input to Output 203060ns t PHL ; R DIFF = 54Ω, C L1 = C L2 = 100pF;e Figures 3 and 5
Driver Input to Output 20
3080ns t PHL ; R DIFF = 54Ω, C L1 = C L2 = 100pF;(SP485EMN ONLY)e Figures 3 and 5Driver Skew
5
10ns e Figures 3 and 5,t SKEW = | t DPLH - t DPHL |
Driver Ri or Fall Time 3
1540ns From 10% to 90%; R DIFF = 54Ω,
C L1 = C L2 = 100pF; s ee Figures 3 & 6Driver Enable to Output High 4070ns C L = 100pF; e Fi
gures 4 & 6; S 2clod
Driver Enable to Output Low 4070ns C L = 100pF; e Figures 4 & 6; S 1clod
Driver Disable Time from Low 4070ns C L = 100pF; e Figures 4 & 6; S 1clod
Driver Disable Time from High 40
70
ns
C L = 100pF; e Figures 4 & 6; S 2
clod
Output Voltages
<-0.3V to (V CC +0. ±.-0.3V to (V CC +0.5V)
校运会总结
-65˚C to +150˚C Power Dissipation per Package
8-pin NSOIC (derate 6.60mW/o C above +70o C)...........................550mW 8-pin PDIP (derate 11.8mW/o C above +70o C)............................1000mW
SPECIFICATIONS (continued)
T MIN to T MAX and V CC = 5V ± 5% unless otherwi noted.
PARAMETERS MIN.TYP.MAX.UNITS CONDITIONS
SP481E/SP485E RECEIVER DC Characteristics
Differential Input Threshold -0.2+0.2Volts -7V ≤ V CM ≤ +12V Differential Input Threshold -0.4+0.4
Volts -7V ≤ V CM ≤ +12V (SP485EMN ONLY)Input Hysteresis 20
mV V CM = 0V
Output Voltage High 3.5Volts I O = -4mA, V ID = +200mV Output Voltage Low
0.4Volts I O = +4mA, V ID = -200mV
Three-State (High Impedance)Output Current ±1
µA 0.4V ≤ V O ≤ 2.4V; RE = 5V Input Resistance 1215
k Ω-7V ≤ V CM ≤ +12V
Input Current (A, B); V IN = 12V +1.0mA DE = 0V, V CC = 0V or 5.25V, V IN = 12V Input Current (A, B); V IN = -7V -0.8mA DE = 0V, V CC = 0V or 5.25V, V IN = -7V Short-Circuit Current 795
mA
0V ≤ V O ≤ V CC
SP481E/SP485E RECEIVER AC Characteristics Maximum Data Rate 10Mbps RE = 0V, DE = 0V Receiver Input to Output 2045100ns t PLH ; R DIFF = 54Ω,
C L1 = C L2 = 100pF; Figures 3 & 7Receiver Input to Output 20
45100
ns t PHL ; R DIFF = 54Ω,
C L1 = C L2 = 100pF; Figures 3 & 7Diff. Receiver Skew It PLH -t PHL I 13ns
R DIFF = 54Ω; C L1 = C L2 = 100pF;Figures 3 & 7
Receiver Enable to Output Low
4570ns C RL = 15pF; Figures 2 & 8; S 1 clod Receiver Enable to Output High
4570ns C RL = 15pF; Figures 2 & 8; S 2 clod Receiver Disable from Low 4570ns C RL = 15pF; Figures 2 & 8; S 1 clod Receiver Disable from High 45
70
ns
C RL = 15pF; Figures 2 & 8; S 2 clod SP481E
冷空气过敏性鼻炎Shutdown Timing Time to Shutdown 50200600ns RE = 5V, DE = 0V
Driver Enable from Shutdown to Output High
40100ns C L = 100pF; See Figures 4 & 6; S 2 clod Driver Enable from Shutdown to Output Low
40100ns C L = 100pF; See Figures 4 & 6; S 1 clod Receiver Enable from Shutdown to Output High 3001000ns C L = 15pF; See Figures 2 & 8; S 2 clod Receiver Enable from Shutdown to Output Low 300大学生入党难吗
1000ns C L = 15pF; See Figures 2 & 8; S 1 clod
POWER REQUIREMENTS Supply Voltage +4.75+5.25
Volts
Supply Current SP481E/485E No Load
900µA RE, DI = 0V or V CC ; DE = V CC 600
µA RE = 0V, DI = 0V or 5V; DE = 0V SP481E
糯米球的做法Shutdown Mode
10
µA
DE = 0V, RE=V CC
ENVIRONMENTAL AND MECHANICAL Operating Temperature Commercial (_C_)0+70°C Industrial (_E_)-40+85°C (_M_)-40+125°C Storage Temperature -65+150°C
Package
Plastic DIP (_P) NSOIC (_N)
PIN FUNCTION
Pin 1 – RO – Receiver Output.
Pin 2 – RE – Receiver Output Enable Active LOW.Pin 3 – DE – Driver Output Enable Active HIGH.Pin 4 – DI – Driver Input.Pin 5 – GND – Ground Connection.
Pin 6 – A – Driver Output/Receiver Input Non-inverting.
Pin 7 – B – Driver Output/Receiver Input Inverting.Pin 8 – Vcc – Positive Supply 4.75V<Vcc< 5.25V.
Figure 5. Driver Propagation Delays
Figure 3. RS-485 Driver/Receiver Timing Test Circuit
Figure 4. RS-485 Driver Timing Test Load #2 Circuit
INPUTS OUTPUTS
LINE
RE DE DI CONDITION B A X11No Fault01 X10No Fault10 X0X X Z Z X1X Fault Z Z小葱种植方法
INPUTS OUTPUTS RE DE A - B R
00 +0.2V1
00 -0.2V0
00Inputs Open1
10X Z
Table 1. Transmit Function Truth Table
Table 2. Receive Function Truth Table
Figure 8. Receiver Enable and Disable Times
