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參數資料
| 型號： | UBA2051T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | One-chip telephone ICs with speech, dialler and ringer functions |
| 中文描述： | TELEPHONE MULTIFUNCTION CKT, PDSO28 |
| 封裝： | PLASTIC, SOT-136, SO-28 |
| 文件頁數： | 2/52頁 |
| 文件大小： | 292K |
| 代理商： | UBA2051T |
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2000 May 19
2
Philips Semiconductors
Product specification
One-chip telephone ICs with speech,
dialler and ringer functions
UBA2050(A); UBA2051(A;C)
FEATURES
Speech/transmission part
Low DC line voltage; operates down to 1.45 V
(excluding voltage drop over external polarity guard)
Line voltage regulator with adjustable DC voltage
Regulated 3.3 V supply (V
DD
) for the dialler part and
peripherals compatible with:
– Speech mode
– Ringer mode
– Trickle mode.
Unregulated supply (V
CC
) for the transmission part and
peripherals
Transmit stage with:
– Microphone amplifier with symmetrical
high-impedance inputs
– DTMF input with confidence tone on receive output.
Receive stage with:
– Receive amplifier with asymmetrical output
– Earpiece amplifier with adjustable gain (and gain
boost facility) for all types of earpieces.
AGC: line loss compensation for microphone and
receive amplifiers.
Dialler part
Last Number Redial (LNR) (32 digits)
Pulse dialling:
– 10 PPS and 20 PPS (resistor option)
– M/B 2 : 3 and 1 : 2 (resistor option).
DTMF timing:
– Manual dialling with minimum duration for bursts and
pauses (85/85 ms)
– Calibrated timing during redialling (85/85 ms).
Pulse or tone mode select at start-up (resistor option)
Flash function (600, 300, 98 and 80 ms) (resistor
options)
Access pause time 2.0 and 3.6 s (resistor option);
access pauses in series are possible
[
/T] key (for mixed mode dialling) or separate
[P
→
T] key
Repertory memory integrity check
Keytone generation (only UBA2050, UBA2050A and
UBA2051C)
Dial Mode Output (DMO) function during pulse dialling
and flash function (only UBA2050 and UBA2051)
LED output for DTMF dialling indication (only
UBA2050A and UBA2051A)
Function keys:
– [LNR/P], [R] and [P
→
T]
– [STORE], [MEM], [M1], [M2] and [M3]
(only UBA2051, UBA2051A and UBA2051C).
Resistor options:
–
[
/T] key definition (MMS)
– Pulse or Tone mode Selection (PTS)
– Flash Time Selection (FTSA and FTSB)
– Make/Break ratio Selection (MBS)
– Pulses Per Second (PPS)
– Access Pause Time (APT).
13 repertory numbers (only UBA2051, UBA2051A and
UBA2051C):
– 3 direct memories (21 digits)
– 10 indirect memories (21 digits).
Supply and temperature independent tone output
On-chip DTMF filtering for low output distortion
(“CEPT CS 203”compatible)
On-chip oscillator suitable for low-cost 3.579545 MHz
quartz crystal or ceramic resonator
Uses standard single-contact keyboard
Keyboard entries fully debounced.
Ringer part
Ringer input frequency discrimination
3-tone ringer with 4 programmable melodies (selectable
via keyboard by keys [1] to [4])
4-level volume control (selectable via keyboard by
keys [5] to [8]).
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