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參數(shù)資料
| 型號(hào)： | SP488CT-L/TR |
| 廠商： | Exar Corporation |
| 文件頁(yè)數(shù)： | 4/6頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC RCVR RS485/RS422 QUAD 16SOIC |
| 產(chǎn)品變化通告： | Product Discontinuation 21/Dec/2011 |
| 標(biāo)準(zhǔn)包裝： | 1,500 |
| 類型： | 接收器 |
| 驅(qū)動(dòng)器/接收器數(shù)： | 0/4 |
| 規(guī)程： | RS422/RS485 |
| 電源電壓： | 5V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-SOIC |
| 包裝： | 帶卷 (TR) |
SP488/489
Quad RS-485/RS-422 Line Receivers
Copyright 2000 Sipex Corporation
4
Pin 13 — RO
4 — Receiver 4 Output — If
Receiver 4 output is enabled, if RI
4A > RI4B by
200mV, Receiver 4 output is high. If Receiver 4
output is enabled, and if RI
4A < RI4B
by
200mV, Receiver 4 output is low.
Pin 14 — RI
4A — Receiver 4 input A.
Pin 15 — RI
4B — Receiver 4 input B.
Pin 16 — Supply Voltage V
CC — 4.75V ≤ VCC ≤
5.25V.
SP489 PINOUT
Pin 1 — RI
1B — Receiver 1 input B.
Pin 2 — RI
1A — Receiver 1 input A.
Pin 3 — RO
1 — Receiver 1 Output — If Re-
ceiver 1 output is enabled, if RI
1A > RI1B
by
200mV, Receiver output is high. If Receiver 1
output is enabled, and if RI
1A < RI1B by 200mV,
Receiver 1 output is low.
Pin 4 — EN1/EN2 — Receiver 1 and 2 Output
Enable. Please refer to SP489 Truth Table (2).
Pin 5 — RO
2 — Receiver 2 Output — If Re-
ceiver 2 output is enabled, if RI
2A > RI2B
by
200mV, Receiver 2 output is high. If Receiver 2
output is enabled, and if RI
2A < RI2B
by
200mV, Receiver 2 output is low.
Pin 6 — RI
2A — Receiver 2 input A.
Pin 7 — RI
2B — Receiver 2 input B.
Pin 8 — GND — Digital Ground.
DIFFERENTIAL
ENABLES
OUTPUT
A – B
EN
RO
V
ID ≥ 0.2V
H
X
H
XL
H
–0.2V < V
ID < +0.2V
H
X
XL
X
V
ID ≤ 0.2V
H
X
L
XL
L
X
L
H
Hi–Z
Table 1. SP488 Truth Table
Pin 9 — RI
3B — Receiver 3 input B.
Pin 10 — RI
3A — Receiver 3 input A.
Pin 11 — RO
3 — Receiver 3 Output — If
Receiver 3 output is enabled, if RI
3A > RI3B by
200mV, Receiver 3 output is high. If Receiver 3
output is enabled, and if RI
3A < RI3B
by
200mV, Receiver 3 output is low.
Pin 12 — EN3/EN4 — Receiver 3 and 4 Output
Enable. Please refer to SP489 Truth Table (2).
Pin 13 — RO
4 — Receiver 4 Output — If
Receiver 4 output is enabled, if RI
4A > RI4B by
200mV, Receiver 4 output is high. If Receiver 4
output is enabled, and if RI
4A < RI4B
by
200mV, Receiver 4 output is low.
Pin 14 — RI
4A — Receiver 4 input A.
Pin 15 — RI
4B — Receiver 4 input B.
Pin 16 — Supply Voltage V
CC — 4.75V ≤ VCC ≤
5.25V.
Table 2. SP489 Truth Table
DIFFERENTIAL
ENABLES
OUTPUT
A – B
EN1/EN2 or EN3/EN4
RO
VID ≥ 0.2V
H
–0.2V < VID < +0.2V
H
X
VID ≤ 0.2V
H
L
X
L
Hi–Z
FEATURES…
The SP488 and SP489 are low–power quad
differential line receivers meeting RS-485 and
RS-422 standards. The SP488 features active
high and active low common receiver enable
controls; the SP489 provides independent, ac-
tive high receiver enable controls for each pair
of receivers. Both feature tri–state outputs and a
-7V to +12V common–mode input range per-
mitting a
±7V ground difference between de-
vices on the communications bus. The SP488/
489 are equipped with a fail–safe feature which
forces a logic high at the receiver output when
the input is left floating. Data rates up to 10Mbps
are supported. Both are available in 16-pin
plastic DIP and SOIC packages.
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