YTD439 Datasheet, PDF (3/15 Pages) List of Unclassifed Manufacturers – ISDN BRI controller for Terminal Equipment with built-in DSU

❍ Functional Comparison of YAMAHA ISDN LSIs
Function
YTD421
YTD428
YTD423
YTD436
YTD439
DSU Function TTC Standard JT-G961
1997 edition
1997 edition
Layer 1
TTC Standard JT-I430
Layer 2
TTC Standard
JT-Q920
JT-Q921
ETSI
ETS 300 012, ETS 300 125
North American Switches
National ISDN-1/2, AT&T 5ESS,
Nortel DMS-100
S/T Ref. Point Analog Driver/Receiver
1993 edition 1993 edition 1993 edition 1997 edition 1997 edition
1993 edition
1993 edition
1998 edition
1993 edition
1998 edition
√
√
√
√
√
√
External
[YTD421]
√
√
Circuit switching
Maximum D
Channel Links Dch Packet Switching
(Teleaction communication)
2
2
2
2
2
2
(2)
(2)
D Channel Layer 3 Data Transfer Method
DMA Transfer DMA Transfer
or
or
I/O Transfer
I/O Transfer I/O Transfer
HDLC Controller for B Channel Data
√
External
√
B Channel Data Transfer Method
DMA
Transfer
DMA
Transfer
or
or
I/O Transfer
I/O Transfer
I/O Transfer
(Note 1)
B Channel Internal Clock Mode (kHz)
32, 56, 64 32, 56, 64
B Channel External Clock Mode
√
√
√
TD Switch
Clock Output Function for CPU
Signal Output Function for Testing
Power Supply (V)
5-V Tolerant I/O pin
Package
√
√
√
√
√
√
√
+5
or
+5
+3.3 (Note 2)
+5
+5
+5
or
or
+3.3 (Note 2) +3.3 (Note 2)
√
20-pin SSOP 100-pin SQFP 100-pin SQFP 100-pin SQFP 100-pin SQFP
Note 1: DMA transfer: Request function only
I/O transfer: 4-byte FIFO
Note 2: Digital power supply only
-3-