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SP1481E 데이터시트 PDF




Sipex에서 제조한 전자 부품 SP1481E은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


PDF 형식의 SP1481E 자료 제공

부품번호 SP1481E 기능
기능 15kV Enhanced Low Power Half-Duplex RS-485 Transceivers
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SP1481E 데이터시트, 핀배열, 회로
®
PRELIMINARY
SP1481E
±15kV Enhanced Low Power Half-Duplex
RS-485 Transceivers
+5V supply
Low Power BiCMOS
Driver/Receiver Enable for Multi-Drop
configurations
Low Power Shutdown Mode (1µA
Typical)
Available in 8 Pin NSOIC or PDIP
packages (Standard 75176 pinout)
Enhanced ESD Specifications:
+15KV Human Body Model
+15KV IEC1000-4-2 Air Discharge
+8KV IEC1000-4-2 Contact Discharge
RO 1
RE 2
DE 3
DI 4
SP1481E
8 Pin - nSOIC
8 VCC
7B
6A
5 GND
DESCRIPTION
The SP1481E is a half-duplex transceiver that meets the specifications of RS-485 and RS-
422 serial protocols with enhanced ESD performance. The ESD tolerance has been improved
on this device to over +15KV for both Human Body Model and IEC1000-4-2 Air Discharge
Method. This device is pin-to-pin compatible with Sipex's SP485 and SP481 devices as well
as popular industry standards. As with the original version, the SP1481E features Sipex's
BiCMOS design allowing low power operation without sacrificing performance. The SP1481E
meets the requirements of the RS-485 and RS-422 protocols up to 20Mbps under load.
BLOCK DIAGRAM
RO 1
RE 2
DE 3
DI 4
R
D
SP1481E
8 Vcc
7B
6A
5 GND
Rev:B Date: 02/26/04
SP1481E Low Power Half-Duplex RS485 Transceivers
1
© Copyright 2004 Sipex Corporation




SP1481E pdf, 반도체, 판매, 대치품
RO 1
R
8 VCC
RE 2
7B
DE 3
DI 4
6A
D
SP485 5 GND
Top View
SP1485E
Pinout (Top View)
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.
+3V
DI
0V
DRIVER
OUTPUT
B
A
DIFFERENTIAL VO+
OUTPUT 0V
VA – VB VO
tSKEW = | tDPLH - tDPHL |
f = 1MHz; tR < 1.0ns; tF < 1.0ns
1.5V
1.5V
tPLH
tPHL
VO 1/2VO
tDPLH
tDPHL
tR
1/2VO
tF
Figure 5. Driver Propagation Delays
Rev:B Date: 02/26/04
SP1481E Low Power Half-Duplex RS485 Transceivers
4
© Copyright 2004 Sipex Corporation

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SP1481E 전자부품, 판매, 대치품
to withstand an amount of static electricity when
ESD is applied to points and surfaces of the
equipment that are accessible to personnel during
normal usage. The transceiver IC receives most
of the ESD current when the ESD source is
applied to the connector pins. The test circuit for
IEC1000-4-2 is shown on Figure 8. There are
two methods within IEC1000-4-2, the Air
Discharge method and the Contact Discharge
method.
RRCC
DC Power
Source
SSWW11
RRSS
CCSS
SSWW22
Device
Under
Test
Figure 7. ESD Test Circuit for Human Body Model
RRCC
DC Power
Source
SSWW11
Contact-Discharge Module
RRSS RV
SSWW22
Device
CCSS Under
Test
RS and RV add up to 330for IEC1000-4-2.
Figure 8. ESD Test Circuit for IEC1000-4-2
Rev:B Date: 02/26/04
SP1481E Low Power Half-Duplex RS485 Transceivers
7
© Copyright 2004 Sipex Corporation

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