參數(shù)資料
型號(hào)： U2510B-M
廠(chǎng)商： TEMIC SEMICONDUCTORS
元件分類(lèi)： 接收器
英文描述： All-Band AM/FM Receiver and Audio Amplifier
中文描述： AM/FM, AUDIO SINGLE CHIP RECEIVER, PDIP28
封裝： SDIP-28
文件頁(yè)數(shù)： 2/15頁(yè)
文件大小： 262K
代理商： U2510B-M
U2510B
Rev. A3, 23-Feb-01
2 (15)
Order Information
Extended Type Number
U2510B-M
U2510B-M__T
Package
SDIP28
SDIP28
Remarks
V
S
< 6 V supply voltage
Pin Description
1
2
3
4
5
6
7
8
10
9
27
22
21
20
18
19
17
12
11
28
25
26
23
24
FM-AFC
FMOsc
V
Ref
FMtank
AMtank
FM-AGC
Vol ctrl in
AMOsc
FMin
CF
FM-discr
Mute
AM/FM detect
V
AGC/AFC
AFC switch
IF-GND
LED drive
V
Treble in
Ripple in
AFin
FM-IFin
V
S
AFout
AF-GND
16
15
14
13
14812
FE-GND
AM/FM
IFout
AM-IFin
Mode ctrl
switch
Figure 2. Pinning
Pin
1
Symbol
Mute
Function
Mute voltage output, time constant (C
23
),
mute depth and threshold adjustable by load
resistance (R
3
)
FM discriminator filter connection, ceramic
resonator or equivalent LC-circuit
Audio negative feedback input. Blocking
capacitor (C
8
) determines the audio amplifiers
low-end cut-off frequency
Input for volume control voltage
2
FM-discr
3
CF
4
Vol ctrl in
Pin
5
Symbol
AMOsc
Function
AM oscillator tank circuit input, recommended
load impedance approximately 2.5 k
AFC diode connection, coupling capacitor
(C
19
) determines the AFC characteristic
(holding range and slope)
FM oscillator tank circuit input, recommended
load impedance approximately 3 k
Regulated voltage output (2.4 V)
FM RF tank circuit connection, recommended
load impedance approximately 3 k
AM RF tank circuit connection, recommended
load impedance approximately 20 k
FM AGC voltage output, time constant (C
20
).
Loading this pin by a resistor (to GND) will
increase the FM AGC threshold, grounding
this pin will switch off the FM AGC function
FM RF input (common-base preamplifier
transistor), recommended (RF) source
impedance approximately 100
FM front-end ground
AM/FM IF output
(collector output of the IF preamplifier)
Mode control input:
Pin
| Function
open
| FM
Ground
| AM
V
S
(R
4
= 10 k ) | Tape
AM IF input, input impedance = 3.1 k
FM IF input, input impedance = 330
Treble control voltage input
Level indicator output
(open-collector output, LED drive)
IF ground
AFC function control input:
Pin
| Function
open
| AFC off
Ground
| f
OSC
> f
in
V
S
| f
OSC
< f
in
AGC/AFC voltage, time constant adjust (C
10
),
input impedance approximately 42 k
AM/FM detector output, the load capacitor
(C
11
) in conjunction with the detector output
resistance (7.5 k ) determines the (FM)
deemphasis as well as the (modulation)
frequency response of the AM detector
Audio amplifier input, input resistance
approximately 100 k
coupling capacitor
(C
9
) determines the low frequency response
Ripple filter connection. Load capacitance
(C
12
) determines the frequency response of the
supply-voltage ripple rejection
Supply voltage input
Audio amplifier output
Ground of the audio power stage
6
FM–AFC
7
FMOsc
8
9
V
Ref
FMtank
10
AMtank
11
FM-AGC
12
FMin
13
14
FE-GND
AM/FM
IFout
Mode ctrl
switch
15
16
17
18
19
AM-IFin
FM-IFin
V
Treble in
LED drive
20
21
IF-GND
AFC switch
22
V
AGC/AFC
23
AM/FM
detect
24
AFin
25
Ripple in
26
27
28
V
S
AFout
AF-GND
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