参数资料
型号: YTD421B
厂商: Yamaha Corporation
元件分类: 外设及接口
英文描述: Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????)
中文描述: 单电源RS232C接口线路驱动器/接收器(单电源RS232C接口线收发器(2发2收))
文件页数: 3/25页
文件大小: 284K
代理商: YTD421B
3.2.
PIN
FUNCTIONS
9
3.2.3
Driv
er
Section
Pin
No.
Pin
Name
I/O
F
unction
Remarks
8
HTD
IN
High
Pulse
of
T
ransmit
Data
Inputs
the
high
pulse
of
transmitting
AMI
signal.
Selects
the
p
olarit
yb
y
setting
TDP
pin.
TTL
in
terface.
Note
5
7
L
TD
IN
Lo
w
Pulse
of
T
ransmit
Data
Inputs
the
lo
w
pulse
of
transmitting
AMI
signal.
Selects
the
p
olarit
yb
y
setting
TDP
pin.
TTL
in
terface.
Note
5
14
LO1
OUT
S/T
Line
Output
(p
ositiv
e)
Connects
to
pulse
transformer
whic
h
driv
es
S/T
bus
12
LO2
OUT
S/T
Line
Output
(negativ
e)
Connects
to
pulse
transformer
whic
h
driv
es
S/T
bus
6
TDP
IN
HTD,
L
TD
Input
Select
\H"
:
HTD
pin,
L
TD
pin
p
ositiv
e
p
olarit
y
\L"
:
HTD
pin,
L
TD
pin
negativ
e
p
olarit
y
Note
6
Note
7
Note
5:
When
pulling
HTD
pin
and
L
TD
pin
up
via
a
pull-up
resistor,
pulls
them
up
to
VDDO
p
o
w
er
source
pin.
Note
6:
When
making
TDP
pin
\H",
connect
it
to
VDDO
p
o
w
er
source
pin.
Note
7:
\p
ositiv
e
p
olarit
y"
means
the
condition
that
v
oltage
lev
el
=
\H"
when
logic
=
binary
\0".
\negativ
e
p
olarit
y"
means
the
condition
that
v
oltage
lev
el
=
\L"
when
logic
=
binary
\0".
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