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MC145532DW датащи(PDF) 4 Page - Motorola, Inc

номер детали MC145532DW
подробное описание детали  ADPCM Transcoder
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производитель  MOTOROLA [Motorola, Inc]
домашняя страница  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

MC145532DW датащи(HTML) 4 Page - Motorola, Inc

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MC145532
MOTOROLA
4
DECODER OUTPUT — SHORT FRAME
Figure 7 shows the timing of the decoder output in short
frame mode.
The DDO will provide the 8–bit PCM word for the decoding
rate that was selected for this frame of data on the decoder
input pins. The data is loaded into the MC145532 during one
frame, decoded on the next frame, and read during the third
frame.
DECODER OUTPUT — LONG FRAME
Figure 8 shows the timing of the decoder output in long
frame mode. Note that at least eight bits are presented to the
output, provided that at least two falling edges of DDC are
seen while DOE is high. The enable can be used to extend
the LSB to a full DDC period and/or cause the eight bits of
data to be recirculated to the output pin until the enable falls.
STANDARDS INFORMATION
The following standards apply to the MC145532:
T1.301–1987 — 32 kbps ADPCM
T1.303–1988 — 24 kbps ADPCM
CCITT G.721–1988, G.723–1988, and G.726 — 32 kbps
and 24 kbps
CCITT, ITU–T, TIA, and EIA documents may be obtained
by contacting Global Engineering Documents in the USA at
(800) 854–7179, or internationally at (303) 397–7956.
ABSOLUTE MAXIMUM RATINGS (Voltages Referenced to VSS)
Rating
Symbol
Value
Unit
DC Supply Voltage
VDD
– 0.5 to + 7.0
V
Voltage, Any Pin to VSS
V
– 0.5 to VDD + 0.5
V
DC Current, Any Pin
Iin
± 10
mA
Operating Temperature
TA
– 40 to + 85
°C
Storage Temperature
Tstg
– 85 to + 150
°C
RECOMMENDED OPERATING CONDITIONS (TA = – 40 to + 85°C)
Parameter
Symbol
Min
Max
Unit
DC Supply Voltage
VDD
4.50
5.50
V
Power Dissipation
PD
0.28
W
DIGITAL CHARACTERISTICS (VDD = 5.0 V, TA = – 40 to + 85°C)
Parameter
Symbol
Min
Max
Unit
High Level Input Voltage
Mode, DOE, DDC, DDI, DIE, EIE, EDI, EDC, EOE
VIH
2.0
V
Low Level Input Voltage
Mode, DOE, DDC, DDI, DIE, EIE, EDI, EDC, EOE
VIL
0.8
V
High Level Input Voltage
RESET, APD, SPC
VIH
0.7 VDD
V
Low Level Input Voltage
RESET, APD, SPC
VIL
0.3 VDD
V
Input Current
Iin
± 1.0
µA
Input Capacitance
Cin
10
pF
High Level Output Voltage (IOH = – 2.0 mA)
DDO, EDO
VOH
4.6
V
Low Level Output Voltage (IOL = 2.0 MA)
DDO, EDO
VOL
0.4
V
Output Leakage Current (VDD = 5.5 V)
DDO, EDO
Ilkg
± 5.0
µA
SWITCHING CHARACTERISTICS (VDD = 5.0 V, TA = – 40 to + 85°C)
Parameter
Min
Max
Unit
SPC Frequency
19.990
23
MHz
SPC Duty Cycle
45
55
%
This device contains circuitry to protect
against damage due to high static voltages or
electric fields; however, it is advised that
normal precautions be taken to avoid appli-
cation of any voltage higher than maximum
rated voltages to this high impedance circuit.
For proper operation it is recommended that
Vin and Vout be constrained to the range VSS ≤
(Vin or Vout) ≤ VDD.
Unused inputs must always be tied to an
appropriate logic voltage level (e.g., either VSS
or VDD).


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