Position: Home  > All Categories> Integrated Circuits (ICs) > C737212M

C737212M

Features: • Fabrication in a CMOS process that allows these circuits to be directly operated from a telephone line• Support for single-contact keypads• Built-in oscillator circuit (fosc = 3.58 MHz) that can drive either a standard color-TV crystal oscillator element or a ceramic ...

product image

C737212M Picture
See larger image
SeekIC No. : 004309737 Detail

C737212M: Features: • Fabrication in a CMOS process that allows these circuits to be directly operated from a telephone line• Support for single-contact keypads• Built-in oscillator circuit ...

C737212M Data Sheet

floor Price/Ceiling Price

Get Latest Price
Part Number:
C737212M
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

SeekIC Buyer Protection PLUS - newly updated for 2013!

  • Escrow Protection.
  • Guaranteed refunds.
  • Secure payments.
  • Learn more >>

Month Sales

268 Transactions

Rating

evaluate  (4.8 stars)

Upload time: 2024/4/25

add to my favourite

Payment Methods

All payment methods are secure and covered by SeekIC Buyer Protection PLUS.

Notice: When you place an order, your payment is made to SeekIC and not to your seller. SeekIC only pays the seller after confirming you have received your order. We will also never share your payment details with your seller.
Product Details

Description



Features:

• Fabrication in a CMOS process that allows these circuits to be directly operated from a telephone line
• Support for single-contact keypads
• Built-in oscillator circuit (fosc = 3.58 MHz) that can drive either a standard color-TV crystal oscillator element or a
   ceramic resonator
• High-precision DTMF signal
• Frequency generator circuit (±0.1%) adopted for eased ceramic resonator selection
• Five one-touch 16-digit auto-dial memories and 20 quick-dialing memories
• On-hook or off-hook can be specified for memory entries.
• Mode change and pause data items can be stored in the dialing memories.
• 63-digit redial memory
• Automatic pause (3.9 seconds) insertion when the mode is switched.
• Automatic pause (1.0 second) insertion after a flash operation.
• Mode changing is one-directional, from pulse mode to tone mode.
• Output of a key press tone (1036 Hz, 31 ms) for keys other than DTMF keys when key input is valid
• Output of an operation complete confirmation tone (2072 Hz, 279 ms for each telephone number) when a telephone
   number is stored in memory
• Generates 12 signal types in DTMF mode.
• Supports an on-hook dialing mode.
• Supports a hold function with hold mode.
• Supports both 10 and 20 pps dialing pulse rates.
• The mode can be switched from either the P/T pin or by a key input.
• Settable dialing pulse circuit closed ratio (make percent): either 33% or 39%.
• Supports either keypad or serial input.
• Provides serial output of the keypad input data and the internal status.
• Capable of controlling the serial output timing.
• Supports 18 user-defined keys.
• Wide operating power-supply voltage range
- Pulse mode: VDD = 1.5 to 5.5 V
- DTMF mode: VDD = 2.0 to 5.5 V
• Low power operation
- Pulse mode: IDD = 0.5 mA max (VDD = 3.0 V)
- DTMF mode: IDD = 1.0 mA max (VDD = 3.0 V)
• Low standby current
- IDR = 0.5 A max (VDD = 1.0 V)


Pinout

Connection Diagram


Specifications

Parameter
Symbol
Conditions
Ratings
Unit

Maximum power supply voltage

VDD max

0.3 to +6.5
V
Maximum input voltage
VIN max
0.3 to VDD +0.3
V
Maximum output voltage
VOUT max
0.3 to VDD +0.3
V
Allowable power dissipation
Pd max
Ta   70 °C
250
mW
Minimum load resistance
PL min
Between the DTMF and VSS pins
1
k
Operating temperature
Topr
30 to +70
°C

Storage temperature
Tstg
40 to +125
°C



Description

The LC737212 and LC737212M are CMOS LSI telephone dialers for pushbutton telephones. They support both DTMF and pulse dialing. These products include 25 16-digit memories for storing telephone numbers and one 63-digit memory for redialing, and they provide, in a single chip, all the functions required for dialing andcontrol for a standard independent telephone, including on-hook dialing and a hold function. C737212M also provide a serial I/O interface for connection to a microcontroller.




Customers Who Bought This Item Also Bought

Margin,quality,low-cost products with low minimum orders. Secure your online payments with SeekIC Buyer Protection.
You may also be interested in :
Cable Assemblies
CS1W-CN114
XW2Z-500T
Potentiometers, Variable Resistors
RV24YN
WXD4-23-3W
Motors, Solenoids, Driver Boards/Modules
IHSS57-36-20
ASD-B2-1521-B
Transformers
TM-09210
BV222-1-00992
Static Control, ESD, Clean Room Products
DPA5
PA800-A41
Batteries, Chargers, Holders
ICR18650-28A
ICR18650-26F/h
View more