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參數(shù)資料
| 型號(hào)： | AN6426NK |
| 廠商： | PANASONIC CORP |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | Hands-free Speech Network IC |
| 中文描述： | TELEPHONE SPEECH CKT, PDIP42 |
| 封裝： | 0.600 INCH, PLASTIC, SDIP-42 |
| 文件頁(yè)數(shù)： | 8/9頁(yè) |
| 文件大小： | 127K |
| 代理商： | AN6426NK |
8
ICs for Telephone
AN6426NK
I
Pin Descriptions (cont.)
3. Power Supply Block
HS
U
voltage source (V
CC1
)
Stabilized by the Pin36 and C22 (220
μ
F).
HS
U
reference voltage (V
r1
)
Results in V
CC
/2 by resistance division (20k
)from the
Pin34 and V
CC
, and stabilized by C22 (220
μ
F)
Constant voltage source (VB)
Results in 1.2V by the Pin35 (band gap reference).
Stabilized by C23 (220
μ
F)
Ground pin (GND)
Pin1 (common with the GND pin of the speaker amplifier)
4. Other Circuit Blocks
Balance network circuit
Prevents howling. (R25, R26, R24, C28, R27, R28)
Telephone circuit connection circuit
Determines the polarity of the telephone circuit. (DB, R30,
Q1, R32, R29, Q2, R31, C29)
Speaker amplifier voltage source (VPO)
Pin6. It is necessary to stabilize the power supply in order
to prevent a receiver signal from leaking to the cir-
cuit.(R34, C30, D1, Q3, C31, R35, C32, Q4)
An AC adapter is available. (Q5, R33, D2, S5)
Speaker amplifier reference voltage (Vr2)
Pin5 (V
CC2
/2)
Stabilized by C4 (100
μ
F)
SP
U
voltage source (V
CC2
)
The Pin29 (normally connected to V
CC
Pin1) is stabilized
by C21 (100
μ
F).
A voltage can be applied from the outside. (S4, Q6, R36,
D3, S1)
34
35
Bandgap
reference
42
1
41
42
6
29
36
Note) The above characteristics are design reference values and not guaranteed values.
HS
I
L
=20mA, f=1kHz
HS
I
L
=90mA, f=1kHz
SP
I
L
=20mA, f=1kHz
Parameter
Symbol
Condition
min
typ
max
Unit
I
Supplementary Explanation
Electrical Characteristics Design Reference Values
(Ta=25
°
C)
AC Impedance (1)
AC Impedance (2)
AC Impedance (3)
Z
ac
(1)
Z
ac
(2)
Z
ac
(3)
450
450
450
610
610
610
750
750
750
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