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| 型號(hào)： | SP503EM-L |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 25/28頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX MULTIPROTOCOL 80LQFP |
| 標(biāo)準(zhǔn)包裝： | 84 |
| 類型： | 收發(fā)器 |
| 驅(qū)動(dòng)器/接收器數(shù)： | 7/7 |
| 規(guī)程： | 多協(xié)議 |
| 電源電壓： | 5V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 80-LQFP |
| 供應(yīng)商設(shè)備封裝： | 80-LQFP（14x14） |
| 包裝： | 托盤 |
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SP503_101_101508
SP503 Multiprotocol Transceiver
Copyright 2008 Exar Corporation
6
OTHER AC CHARACTERISTICS
(Typical @ 25°C and nominal supply voltages unless otherwise noted)
PARAMETER
MIN.
TYP.
MAX.
UNITS
CONDITIONS
DELAY TIME FROM ENABLE MODE TO TRI–STATE MODE
SINGLE–ENDED MODE (RS-232, RS-423)
t
PZL; Enable to Output LOW
190
ns
3k
pull–up to output
t
PZH; Enable to Output HIGH
130
ns
3k
pull–down to output
t
PLZ; Disable from Output LOW
270
ns
5V to input
t
PHZ; Disable from Output HIGH
400
ns
GND to input
DIFFERENTIAL MODE (RS-422, RS-485, V.35)
t
PZL; Enable to Output LOW
100
ns
3k
pull–up to output
t
PZH; Enable to Output HIGH
100
ns
3k
pull–down to output
t
PLZ; Disable from Output LOW
130
ns
5V to input
t
PHZ; Disable from Output HIGH
140
ns
GND to input
Notes:
1.
Measured from 2.5V of R
IN to 2.5V of ROUT.
2.
Measured from one–half of R
IN to 2.5V of ROUT.
3.
Measured from 1.5V of T
IN to one–half of TOUT.
4.
Measured from 2.5V of R
O to 0V of A and B.
PINOUT…
RxD 1
RDEC0 2
RDEC1 3
RDEC2 4
RDEC3 5
TTEN 6
SCTEN 7
VCC 8
TDEC3 9
TDEC2 10
TDEC1 11
TDEC0 12
DTR 13
TxD 14
TxC 15
RTS 16
RL 17
NC 18
DCD 19
RxC 20
RI
21
ST
22
STEN
23
LL
24
V
CC
25
C
1
+
26
V
DD
27
C
2
+
28
GND
29
C
1
–
30
C
2
–
31
V
SS
32
V
CC
33
GND
34
RR(a)
35
RR(b)
36
RT(a)
37
RT(b)
38
IC(a)
39
IC(b)
40
60 GND
59 SD(b)
58 TR(a)
57 GND
56 TR(b)
55 VCC
54 RS(a)
53 GND
52 RS(b)
51 LL(a)
50 GND
49 LL(b)
48 VCC
47 RL(a)
46 GND
45 RL(b)
44 ST(b)
43 GND
42 ST(a)
41 VCC
80
CTS
79
SCT
78
DSR
77
SCT(b)
76
SCT(a)
75
GND
74
V
CC
73
V
CC
72
GND
71
RD(b)
70
RD(a)
69
DM(b)
68
DM(a)
67
CS(b)
66
CS(a)
65
TT(b)
64
GND
63
TT(a)
62
V
CC
61
SD(a)
SP503
PIN ASSIGNMENTS…
CLOCK AND DATA GROUP
Pin 1 — RxD — Receive Data; TTL output,
sourced from RD(a) and RD(b) inputs.
Pin 14 — TxD — TTL input ; transmit data
source for SD(a) and SD(b) outputs.
Pin 15 — TxC — Transmit Clock; TTL input for
TT driver outputs.
Pin 20 — RxC — Receive Clock; TTL output
sourced from RT(a) and RT(b) inputs.
Pin 22 — ST — Send Timing; TTL input; source
for ST(a) and ST(b) outputs.
Pin 37 — RT(a) — Receive Timing; analog
input, inverted; source for RxC.
Pin 38 — RT(b) — Receive Timing; analog
input, non-inverted; source for RxC.
Pin 42 — ST(a) — Send Timing; analog output,
inverted; sourced from ST.
Pin 44 — ST(b) — Send Timing; analog output,
non-inverted; sourced from ST.
Pin 59 — SD(b) — Analog Out — Send data,
non-inverted; sourced from TxD.
Pin 61 — SD(a) — Analog Out — Send data,
inverted; sourced from TxD.
Pin 63 — TT(a) — Analog Out — Terminal
Timing, inverted; sourced from TxC
Pin 65 — TT(b) — Analog Out — Terminal
Timing, non–inverted; sourced from TxC.
Pin 70 — RD(a) — Receive Data, analog input;
inverted; source for RxD.
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