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PDF ( 数据手册 , 数据表 ) SC91215B

零件编号 SC91215B
描述 TONE/PULSE DIALER
制造商 Silan Microelectronics
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SC91215B 数据手册, 描述, 功能
SC91214/91215 SERIES
T/P SWITCHABLE DIALER WITH REDIAL HANDFREE FUNCTION
DESCRIPTION
The SC91214/15 Series is a single-chip, silicon gate, CMOS
integrated circuit with an on-chip oscillator for a 3.58MHZ crystal or
ceramic resonator. It provides a dialing pulse (DP) or dual tone multi-
frequency (DTMF) dialing. A standard 4 X4 matrix keyboard can be used
to support either DP or DTMF modes.
FEATURES
* One touch redial operation
* Tone/Pulse switchable
* 32 digit capacity for redialing
* Automatic mixed redialing (last number redial) of pulse to DTMF with
multiple automatic access pauses
* PABX auto-pause is 2.2 seconds
ORDERING INFORMATION
* DTMF Timing:
Manual dialing: minimum duration for bursts and pauses
Redialing: calibrated timing
* Hands-Free control function
* Wide operating voltage range: 2V to 5.5V
* Key-in beep tone output
Part
SC91214/15A
SC91214/15B
SC91214/15C
SC91214/15D
Package
DIP-16 Package
DIP-18 Package
DIP-18 Package
DIP-20 Package
* Digits dialed manually after redialing are cascadable and stored as
additional digits for the next redialing
* Uses inexpensive ceramic resonator (3.58 MHZ)
* Two versions for different telephone systems
* Built-in power up reset circuit
* Four extra function keys: flash, pause, redial and DP or DTMF mixed
dialing
* 4 X 4 (or 2 X 8) keyboard can be used
* Low standby current
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.0 2004.08.03
Page 1 of 16







SC91215B pdf, 数据表
SC91214/91215 SERIES
KEYBOARD OPERATION
Symbol definitions:
In the description below, signals are defined in terms of the key or switch, which is activated.
OFF Hook
means the phone is off the hook.
ON Hook
means the phone is on the hook.
D1 represents for the first digit dialed in a string of digits.
Dn (Dk)
represents for the last digit dialed in a string of digits.
Dn+1
represent for the beginning of a new string of digits.
Dn+m
represents for the last digit in a new string of digits.
HFI
*/T
represents for the switch that activates the HANDS-FREE DIALING mode going low.
is the Pulse-to-DTMF key.
RD is the Redial key.
0 is the Zero key.
P is the Pause key.
F is the Flash key.
Recommended Operation
1. PULSE mode operation
a. Off Hook D1 Dn
PULSE mode is defined as the INTIAL mode, provided the first keyboard input is not the */T key following the
Off Hook condition and the mode selection pin is floating (MODE IN = VDD or floating).
b. On Hook HFI D1 Dn
Pulse mode is defined as the INITIAL mode, provided the key input D1 is not */T while the mode selection
pin is VDD or floating. The chip will pause for 824 ms automatically after it detects an Off-Hook condition or if the
HFI key is depressed. It then proceeds with pulse or DTMF dialing if any keys have been depressed.
The dialing rate or make/break ratio is decided at the first key entry by checking the MODE IN status and will
not be altered. The MODE IN status can only switch the DIALING mode from PULSE to DTMF after the first key
ectry.
2. DTMF mode operation
a. Off Hook D1 Dn or On Hook HFI D1 Dn
DTMF mode is defined as the INTIAL mode if the mode selection pin MOD IN is VSS.
b. Off Hook D1 Dn or On Hook HFI */T D1 Dn
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.0 2004.08.03
Page 8 of 16







SC91215B equivalent, schematic
PACKAGE OUTLINE(continued)
DIP-20-300-2.54
SC91214/91215 SERIES
UNIT: mm
2.54
0.51MIN
26.4±0.3
1.27
0.51
15 degree
HANDLING MOS DEVICES:
Electrostatic charges can exist in many things. All of our MOS devices are internally protected against
electrostatic discharge but they can be damaged if the following precautions are not taken:
Persons at a work bench should be earthed via a wrist strap.
Equipment cases should be earthed.
All tools used during assembly, including soldering tools and solder baths, must be earthed.
MOS devices should be packed for dispatch in antistatic/conductive containers.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.0 2004.08.03
Page 16 of 16










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