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DS2167Q 参数 Datasheet PDF下载

DS2167Q图片预览
型号: DS2167Q
PDF下载: 下载PDF文件 查看货源
内容描述: ADPCM处理器 [ADPCM Processor]
分类和应用: PC
文件页数/大小: 15 页 / 88 K
品牌: DALLAS [ DALLAS SEMICONDUCTOR ]
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DS2167/DS2168
DS2167/DS2168
ADPCM Processor
FEATURES
PIN ASSIGNMENT
RST
TM0
TM1
A0
A1
A2
A3
A4
A5
SPS
MCLK
VSS
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
VDD
YIN
CLKY
FSY
YOUT
CS
SDI
SCLK
XOUT
FSX
CLKX
XIN
Speech compression chip compatible with standard
ADPCM algorithms:
– DS2167 supports “new” T1Y1 recommenda-
tions (July 1986) and “new” CCITT G.721 rec-
ommendations
– DS2168 supports “old” CCITT G.721 recom-
mendations
Dual independent channel architecture – device may
be programmed to perform full duplex, 2-channel ex-
pansions, or 2-channel compressions
Interconnects directly with
µ-law
or A-law codec/filter
devices
24-Pin DIP (600 MIL)
CLKY
FSY
YOUT
CS
SDI
SCLK
XOUT
NC
TM1
TM0
RST
NC
VDD
YIN
NC
A0
A1
A2
A3
A4
A5
54 3 2
6
7
8
9
28-Pin PLCC
Serial PCM and control port interfaces minimize “glue
logic” in multiple channel applications
– On-chip channel counters identify input and out-
put timeslots in TDM-based systems
– Unique addressing scheme simplifies device
control; 3-wire port shared among 64 devices
– Bypass and idle features allow dynamic alloca-
tion of channel bandwidth, minimize system
power requirements
1 28 27 26 25
24
23
22
21
10
20
11
12 13 14 15 16 17 1819
SPS
MCLK
VSS
NC
XIN
CLKX
FSX
Hardware mode intended for stand-alone use
– No host processor required
– Ideal for voice mail applications
28-pin surface-mount package available, designated
DS2167Q/DS2168Q
DESCRIPTION
The DS2167 and DS2168 are dedicated digital signal
processor (DSP) CMOS chips optimized for Adaptive
Differential Pulse Code Modulation (ADPCM) based
compression algorithms. The devices halve the trans-
mission bandwidth of “toll quality” voice from 64K to 32K
bits/second and are utilized in PCM-based telephony
networks.
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