U3759B-NFNG3 [ATMEL]
Telephone Multifunction Circuit, PDSO28, SSOP-28;
| 型号： | U3759B-NFNG3 |
| 厂家： | 
ATMEL |
| 描述： | Telephone Multifunction Circuit, PDSO28, SSOP-28 电信 光电二极管 电信集成电路 |
| 文件： | 总13页 (文件大小：111K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
U3759B-N
Universal Telephone IC – All Functions Integrated
Description
Atmel Wireless
&
Microcontrollers’ low-voltage
telephone circuit U3759B-N performs the speech and line Electrostatic sensitive device.
interface functions and the tone ringer required in an Observe precautions for handling.
electronic telephone set. Operation below 15 mA is pos-
sible with reduced performance.
Features
Speech Circuit
Tone Ringer
D 2-tone ringer
D Adjustable DC characteristic
D Symmetrical input of microphone amplifier
D Adjustable volume
D RC oscillator
D Adjustable threshold
D Receiving amplifier for dynamic or
piezo-electric earpieces
Benefits
D Automatic line-loss compensation
D Low number of external components
D High quality through one IC solution
Ordering Information
Extended Type Number
U3759B-NFN
Package
SSO28
SSO28
Remarks
Tube
U3759B-NFNG3
Taped and reeled
Rev. A3, 17-Sep-01
1 (13)
U3759B-N
Block Diagram / Applications
Figure 19. Block diagram / applications
2 (13)
Rev. A3, 17-Sep-01
U3759B-N
Pin Description
VRING
VRIAC
AGC
1
2
3
4
5
6
7
8
9
28
27
26
25
24
23
22
21
20
RCK
OUT
THA
VDD
ST
PRIVACY
MUTE
n.c.
CLIM
RECO1
RECO2
RECIN
PRIND
VI
PROD
n.c.
MASKIN
n.c.
19
18
17
10
11
12
GND
MIC1
MIC2
MICO
TIN
13
14
16 RDC
VL
15
Figure 20. Pinning SSO28
Pin
Symbol
Function
Configuration
1
VRING DC supply voltage for the tone ringer is lim-
ited to 30 V with integrated Z-diode.
VRING
OUT
200
30V
50V
6.5K
PD
PD
Rev. A3, 17-Sep-01
3 (13)
U3759B-N
Pin
Symbol
Function
Configuration
2
RCK
RC clock oscillator for ringer
3.4V
0.8V
RCK
6V
6V
PD
3
OUT
VDD
Buzzer output
VRING
OUT
200
30V
6.5K
PD
50V
PD
4
5
Supply output for dialer part
VL
I
= 750 mA out of VDD for external
DD max
functions
6V
VDD
6V
PD
MUTE Active Low: MUTE < 150 mV
Forcing MUTE to GND mutes the micro-
phone and decreases the earpiece signal by
typically 29 dB; no pull up circuit allowed.
Dialer/mC port must be open drain.
VBG
30K
MUTE
MUTE
6.7V
PD
6
7
n.c.
Not connected
PROD During Low level (< 100 mV) handset mute is
active.
VI
2.5u
PROD
VBG
30k
30k
PD
6V
8
9
n.c.
Not connected
100k
MASKIN
MASKIN Short mute during pulse dialing, active high
During MASK an internal npn-transistor
shortens VL against VI.
PD
6V
50k
10
11
n.c.
Not connected
GND
4 (13)
Rev. A3, 17-Sep-01
U3759B-N
Pin
Symbol
Function
Configuration
12
MIC 1 Inverting input of microphone amplifier
VI
1V
13
MIC 2 Non-inverting input of microphone amplifier
50K
50K
PD
MIC1
MIC2
1V
VI
PD
14
MICO Transmit pre-amp output which is normally
capacitively coupled to Pin TIN
Coupling point for DTMF signal from dialer/
mC
VI
1V
16K
Input for prefiltering and level adjustment
circuit of incoming dialer signal
(see application circuit)
MICO
PD
15
16
VL
Positive supply voltage input to the device.
The current through this pin is modulated by
the transmit signal.
VL
16V
PD
RDC
PD
VL
RDC
An external resistor (1 W) is required from
this pin to GND to control the DC input im-
pedance of the circuit. It has a nominal value
of 39 W for low-voltage operation. Values up
to 100 W may be used to increase the avail-
able transmit output voltage swing at the ex-
pense of low-voltage operation.
AGC
RDC
PD
PD
17
18
TIN
Input to the line output driver amplifier.
Transmit AGC applied to this stage.
1V
5.6K
TIN
16V
PD
V
I
This internal voltage bias line must be con-
nected to VL via an external resistor which
dominates the AC input impedance of the cir-
cuit and should be 680 Ω for an 600-W input
impedance or 1.2 kΩ for a 900-Ω input im-
pedance.
VI
16V
PD
VL
PRIND
19
PRIND PRIVACY indication pin
Open collector with minimum 1 mA drive
current to GND when PRIVACY = active
6.7V
PD
Rev. A3, 17-Sep-01
5 (13)
U3759B-N
Pin
Symbol
Function
Configuration
20
RECIN Receive amplifier input. The receiving ampli-
fication is regulated by an AGC.
60K
RECIN
21
22
RECO2 Output of the receive amplifier. Dynamic
transducers with a minimum impedance of
RECO1 100 W can be directly driven by these outputs.
VL
60K
1V
RECO2
RECO1
6.7V
PD
VL
23
24
CLIM
Time constant of anticlipping in transmit path.
CLIM w 2.2 mF
CLIM = GND: anticlipping inactive
IDC
CLIM
6V
PD
PRI-
Toggle input for handset mute
VI
VACY Negative trigger pulse activates handset mute
and privacy indication output (PRIND).
2.5u
1k
2.5u
PRIVACY
PD
6V
50k
50k
25
26
ST
The output of the sidetone cancellation signal,
which requires a balanced impedance of 8 to
10 times the subscribers line impedance to be
connected to Pin VL.
ST
16V
PD
THA
Ringer threshold adjustment
VRIAC
160K
140K
GND
12K
1V
20K
6V
6V
THA
AGC
PD
VL
27
28
AGC
The range of transmit and receive gain varia-
tions between short and long loops may be
adjusted by connecting a resistor R
from
AGC
this pin to (GND). This pin can be left open to
set AGC out of action.
PD
RDC
PD
VRIAC Ringing supply
70K
10K
VRIAC
50V
PD
6 (13)
Rev. A3, 17-Sep-01
U3759B-N
Absolute Maximum Ratings
Parameters
Line current
Symbol
Value
Unit
mA
V
I
140
14
L
DC line voltage
V
L
DC voltage at Pins 1 to 11 and 33 to 44
Junction temperature
V
5.5
V
DC
T
125
°C
°C
°C
W
j
Ambient temperature
T
amb
–25 to +75
–55 to +150
0.9
Storage temperature
T
stg
Total power dissipation, T
= 60°C
SSO28
P
tot
amb
ESD withstand voltage 1 kV according to ESD standard S5.1 (HBM)
Thermal Resistance
Parameter
Symbol
Value
Unit
Junction ambient
SSO28
R
70
K/W
thJA
Electrical Characteristics: Speech Circuit
Reference point Pin GND, f = 1000 Hz, 0 dBm = 775 mV
R
= 39 Ω / 1 W, T = 25°C, unless otherwise specified,
rms, DC amb
refer to “Basic Test Circuit”. CLIM = GND
Parameters
Line voltage
Test Conditions / Pin
I = 8 mA
Symbol
Min.
Typ.
Max.
Unit
V
L
1.4
3.85
6.55
V
V
V
V
L
I = 20 mA
3.6
5.9
6.9
4.1
7.2
8.2
L
I = 73 mA
L
I = 100 mA
L
Transmit and sidetone
Input resistance
R
R
45
80
120
48.8
0.5
kΩ
dB
dB
i
i
Gain
I = 20 mA, S5 = open
L
G
s
46.8
–0.5
47.8
Gain change with current
I = 20 to 60 mA
L
DG
S
R
= infinite
AGC
Gain deviation
T
= –10 to +60°C
DG
–0.5
–7
0.5
dB
amb
S
I = 20 mA
L
Line-loss compensation
Distortion at line
R
= 12 kW, I = 73 mA
DG
s
–6
–4.8
2
dB
%
AGC
L
I = 20 mA, S5 = open
L
d
t
V = 0.775 V
L
rms
Max. output voltage at line I = 20 mA, V = 10 mV,
V
Lmax
1.2
3.5
dBm
ms
L
mic
d x 5%
CLIM = 2.2 mF, S = open
1
Attack time transmit
anticlipping
CLIM = 2.2 mF
t
att
Noise at line weighted
psophometrically
I > 20 mA, G = 48dB
n
o
– 72
20
dBmp
dB
L
S
Sidetone reduction
I y 20 mA
L
G
STA
10
15
Rev. A3, 17-Sep-01
7 (13)
U3759B-N
Electrical Characteristics: Speech Circuit (continued)
Parameters
Receiving amplifier
Gain
Test Conditions / Pin
Symbol
Min.
Typ.
Max.
Unit
I w 20 mA
G
R
3
5
dB
dB
L
Gain change with current
I = 20 to 60 mA
DG
DG
DG
–0.5
0.5
L
R
R
R
R
= infinite
AGC
Gain deviation
T
L
= –10 to +60°C
–0.3
–7
0.7
dB
amb
I = 20 mA
Line-loss compensation
I = 73 mA
–6
–4.7
–71
dB
L
Receiving noise at
earphone weighted
psophometrially
I = 73 mA
n
–77.5
dBm
L
i
Gain change when muted
Output voltage push-pull
I y 20 mA
G
24
29
34
2.5
6.3
dB
L
RM
I y 20 mA, Z = 68 nF,
V
RECO
0.8
0.9
V
rms
L
ear
100 W in series, d ≤ 2%
Ear protection differential
I = 40 mA, V = 4 V
,
V
1.3
1.6
V
rms
L
gen
rms
ear
Z
= 68 nF + 100 W
ear
Supply voltage
Output voltage
I y 20 mA dialing mode
L
V
2.0
V
DD
Note: Output must be limited
externally to max. 5.5 V
Available current for
peripherals
I y 20 mA dialing mode
L
I
750
mA
DD
Transmit
Maximum output voltage
swing at line
I = 20 mA,
V
3.4
4
Vpp
dB
L
L max
V
MIC
= 50 mV
rms
Mute suppression transmit I = 20 mA
G
SPRIV
60
L
with privacy function
Electrical Characteristics Tone Ringer
f
= 4 kHz, V
= 20 V, T
= 25_C, reference point GND, unless otherwise specified
RCK
RING
amb
Parameter
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
Supply current,
outputs open
V
RIAC
= 20 V
I
2.1
3.8
mA
RING
Switch-on threshold
Switch-off threshold
Ringing frequency
V
V
, THA = open
V
8
9
10
V
V
RIAC
RON
V
ROFF
5.0
5.6
6.5
RIAC
R = 150 kΩ, C = 1 nF
f
f
937
752
1010
808
1083
868
Hz
Hz
1H
V
RIAC
> V
RON
1L
Range of external compo-
nents for R/ C oscillator
C
R
1000
50
2200
330
pF
kW
Audio sequence frequency
Output voltage swing
Turn-off delay
f
11.5
21
12.5
23
14.0
Hz
2
V
= 25 V, C = 68 nF
V
V
pp
Ring
out
out
off
See figure 15
t
65
100
ms
Remark: Max. current into internal Zener Diode at Pin VRING = 20 mA
8 (13)
Rev. A3, 17-Sep-01
U3759B-N
Volt
VRING
0
t
t
t
VRIAC
0
OUT
Melody
0
t
off
Figure 21. Turn-off delay time
Note
The oscillator frequency is defined by R and C at Pin oscillator frequency by internal deviders. So f , f and
2
1H
RCK.
f
are given by:
1L
1
fOsc
320
fOsc
4
fOsc
5
fOsc
[
f2 +
; f1H
+
; f1L +
[
]
1.594 C R ) 3809 W
The audio sequence frequency f and the ratio of low For more information of adjusting ringer melody see
2
frequency f and high frequency f are derived from document “Application and Adjustment Hints ”
1L
1H
Rev. A3, 17-Sep-01
9 (13)
U3759B-N
Basic Test Circuit
t o e s T t e r
Figure 22. Basic test circuit
10 (13)
Rev. A3, 17-Sep-01
U3759B-N
Equations for Electrical Characteristic Parameters of the Speech Circuit
The equations refer to the basic test circuit. If not otherwise specified, the switches in the basic test circuit are inactive.
Transmit gain
Receiving gain
VL
VMIC
VRECO
VL
GS + 20 log ǒ Ǔ
GR + 20 log ǒ Ǔ
V
MIC
= 3 mV/1 kHz, S5 = open
RX-mode: V = 300 mV/1 kHz, S7b
gen
Line-loss compensation transmit
Sidetone reduction
DGS + GS(at IL + 73 mA)–GS(at IL + 20 mA)
VL
VRECO
GSTA + 20 logǒ Ǔ(in TX–mode) ) GR
TX-mode: V
= 3 mV/1 kHz, S5 = open
MIC
TX-mode: V
= 3 mV/1 kHz, S5 = open
MIC
Line-loss compensation receive
Input impedance of microphone amplifier
50 k
DGR + GR(at IL + 73 mA)–GR(at IL + 20 mA)
Ri +
VL
VL
(S6 + closed)
ǒ
–1Ǔ
RX-mode: V = 300 mV/1 kHz, S7b
gen
(S6 + open)
TX-mode: V
= 3 mV/1 kHz, S5 = open
MIC
Gain change when muted
VRECO
VL
VRECO
VL
GRM + 20 log
(Mute + inactive)–20 log
(Mute + active)
V
gen
= 100 mV/1 kHz, S5 = open, S8 = open
Rev. A3, 17-Sep-01
11 (13)
U3759B-N
Packaging Information
Package SSO28
Dimensions in mm
9.25
8.75
12.9
12.7
7.5
7.3
2.35
0.25
0.30
0.80
0.25
0.10
10.50
10.20
10.4
technical drawings
according to DIN
specifications
1
2
12 (13)
Rev. A3, 17-Sep-01
U3759B-N
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It is the policy of Atmel Germany GmbH to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems
with respect to their impact on the health and safety of our employees and the public, as well as their impact on
the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as
ozone depleting substances (ODSs).
The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs and forbid
their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on these
substances.
Atmel Germany GmbH has been able to use its policy of continuous improvements to eliminate the use of ODSs listed
in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively
2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency (EPA) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively.
Atmel Germany GmbH can certify that our semiconductors are not manufactured with ozone depleting substances
and do not contain such substances.
We reserve the right to make changes to improve technical design and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each customer
application by the customer. Should the buyer use Atmel Wireless & Microcontrollers products for any unintended
or unauthorized application, the buyer shall indemnify Atmel Wireless & Microcontrollers against all claims,
costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death
associated with such unintended or unauthorized use.
Data sheets can also be retrieved from the Internet:
http://www.atmel–wm.com
Atmel Germany GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 (0)7131 67 2594, Fax number: 49 (0)7131 67 2423
Rev. A3, 17-Sep-01
13 (13)
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