YTD428 YAMAHA [YAMAHA CORPORATION], YTD428 Datasheet - Page 11

• Manufacturer Part Number: YTD428
• Description: DSU LSI for the ISDN Terminal Equipment
• Manufacturer: YAMAHA [YAMAHA CORPORATION]

(V
Note 1
Note 2
H
H
H
H
T
D
Z
a r
e
T
T
T
T
l e
DD
T Reference Point Transmit Characteristic (TE mode)
o r
, D
, D
, D
, D
s n
y a
C
m
= 5.0 V, T
L
L
L
L
i T
P
o r
t i
T
T
T
T
a
Measuring with R
Figure 3 shows the timing when TDP = “H”. When TDP = “L”, the output signal polarity from HRD and LRD pins are
inverted.
m
HTD (I)
LTD (I)
Transmit signal (O)
(LOI - LO2)
s s
D
D
D
D
a r
i S
e
n g
D
m
P
P
i R
F
l u
l u
l l a
l e
t e
e s
l a
e s
e s
y a
r e
i T
i T
e P
G
i T
op
m
m
p a
i r
e
m
e
= -20 ~ 70 C, C
d o
e
L
voltage drop as shown in Figure 4.
S
y
t
t
t
t
t
t
t
m
G
t
t
S
S
S
S
S
S
S
S
R
D
A
R
F
F
W
R
F
b
H
L
H
L
Z
P
l o
t
SR
t
t
C
SRH
SRL
L
o
N
N
N
N
N
= 50 pF)
n
o
o
o
o
o
d
e t
e t
e t
e t
e t
t i
o i
1
1
1
1
1
Figure 3 Transmit Timing
t
n
SW
t
t
SFL
SFH
M
. 4
4
4
1
0
0
0 9
0
0 9
5 6
5 9
i
. n
t
SF
t
t
t
SRH
SR
SRL
T
y
. p
t
SW
t
t
SF
SDZ
M
0 1
0 1
. 5
2
2
4
6
1
0 3
0 6
0 6
0 9
5 8
5 6
a
5 4
0 1
0 1
t
. x
GAP
t
SFL
U
s µ
n
s n
s n
s n
s n
s n
s n
s n
s n
s t i
t
SFH
-0.15 V
-1.35 V
2.4 V
0.4 V
2.4 V
0.4 V
1.35 V
0.15 V
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