參數(shù)資料
型號： MC14LC5540DW
廠商： Freescale Semiconductor
文件頁數(shù)： 10/28頁
文件大?。?/td> 0K
描述： IC CODEC ADPCM 28-SOIC W
標(biāo)準(zhǔn)包裝： 26
類型： ADPCM 編解碼器/濾波器
數(shù)據(jù)接口： PCM 音頻接口
分辨率（位）： 13 b
ADC / DAC 數(shù)量： 1 / 1
三角積分調(diào)變： 無
電壓 - 電源，數(shù)字： 4.5V ~ 5.5V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 28-SOIC（0.295"，7.50mm 寬）
供應(yīng)商設(shè)備封裝： 28-SOIC W
包裝： 管件
MC145484
MOTOROLA
18
DIGITAL SWITCHING CHARACTERISTICS FOR GCI MODE
(VDD = 5.0 V ± 10%, TA = – 40 to + 85°C, CL = 150 pF, See Figure 6 and Note 1)
Ref.
No.
Characteristics
Min
Max
Unit
42
Time Between Successive FSC Pulses
Note 2
43
DCL Clock Frequency
512
6176
kHz
44
DCL Clock Pulse Width High
50
—
ns
45
DCL Clock Pulse Width Low
50
—
ns
46
Hold Time of FSC After Falling Edge of DCL
20
—
ns
47
Setup Time of FSC to DCL Falling Edge
60
—
ns
48
Rising Edge of DCL (After Rising Edge of FSC) to Low Impedance and Valid Data of Dout
—
60
ns
49
Rising Edge of FSC (While DCL is High) to Low Impedance and Valid Data of Dout
—
60
ns
50
Rising Edge of DCL to Valid Data on Dout
—
60
ns
51
Second DCL Falling Edge During LSB to High Impedance of Dout
10
50
ns
52
Setup Time of Din Before Rising Edge of DCL
20
—
ns
53
Hold Time of Din After DCL Rising Edge
—
60
ns
NOTES:
1. Measurements are made from the point at which the logic signal achieves the guaranteed minimum or maximum logic level.
2. In GCI mode, both transmit and receive 8–bit PCM words are accessed during the B1 channel, or both transmit and receive 8–bit PCM words
are accessed during the B2 channel as shown in Figure 6. GCI accesses must occur at a rate of 8 kHz (125
s interval).
31
FSC
(FST)
12
11
10
9
Din (DR)
CH1
MSB
CH1
MSB
Dout (DT)
DCL
(BCLKT)
5
4
3
2
1
34
33
32
30
29
28
27
26
25
24
23
22
21
20
19
18
17
15 16
14
13
8
7
6
5
4
3
2
LSB
ST3
ST2
ST1
CH3
CH2
CH1
MSB
LSB
ST3
ST2
ST1
CH3
CH2
CH1
MSB
LSB
ST3
ST2
ST1
CH3
CH2
CH1
MSB
LSB
ST3
ST2
ST1
CH3
CH2
CH1
Din (DR)
Dout (DT)
DCL
(BCLKT)
FSC
(FST)
46
47
44
43
45
49
48
52
53
52
53
52
53
MSB
49
50
51
48
50
51
42
Figure 6. GCI Interface Timing
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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