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參數(shù)資料
| 型號(hào)： | TDA9845T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | TV and VTR stereo/dual sound processor with digital identification |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO20 |
| 封裝： | PLASTIC, SO-20 |
| 文件頁數(shù)： | 7/20頁 |
| 文件大?。?/td> | 177K |
| 代理商： | TDA9845T |
1995 Mar 20
7
Philips Semiconductors
Preliminary specification
TV and VTR stereo/dual sound processor
with digital identification
TDA9845
Power supply
The different supply voltages and currents required for the
analog and digital circuits are derived from an internal
band-gap reference circuit. The AF reference voltage is
1
2
V
P
. For a fast setting to
1
2
V
P
an internal start-up circuit
is added. A good ripple rejection is achieved with the
external capacitor C
ref
= 100
μ
F/16 V in conjunction with
the high ohmic input of the
1
2
V
P
pin (pin 7). No additional
DC load on this pin is allowed.
Power-on reset
When a power-on reset is activated by switching on the
supply voltage or because of a supply voltage breakdown,
the 117/274 Hz DPLL, the 117/274 Hz integrator and the
logic will be reset. The AF channel (Main) is muted
(
≤
1 ms).
ESD protection
All pins are ESD protected. The protection circuits
represent the latest state of the art.
Internal circuit
The internal pin loading diagram is given in Fig.7.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
Note
1.
Charge device model class A: discharging a 200 pF capacitor through a
series resistor.
THERMAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
V
P
V
i
V
i
V
i
T
stg
T
amb
V
esd
supply voltage (pin 18)
voltage at pins 1, 2 and 20
voltage at pins 3 to 13, 17 and 19
voltage at pins 14 and 15
storage temperature
operating ambient temperature
electrostatic handling for all pins
0.3
0.3
0.3
0.3
25
0
500
10
9.0
V
P
10
+150
+70
+500
V
V
V
V
°
C
°
C
V
note 1
SYMBOL
PARAMETER
VALUE
UNIT
R
th j-a
thermal resistance from junction to ambient in free air
DIP20
SO20
73
90
K/W
K/W
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