MC145745FW ,V.21/V.23 Telemeter ModemMAXIMUM RATINGSThis device contains circuitry to protect theRating Symbol Value Unitinputs against ..
MC14574P ,CMOS MSI(PROGRAMMABLE DUAL OP AMP / DUAL COMPARATORMAXIMUM RATINGS? (Voltages referenced to V531Rating 7 Symbol Value UnitDC Supply Voltage VDD 7 0 51 ..
MC14575P ,CMOS MSI(PROGRAMMABLE DUAL OP AMP / DUAL COMPARATORMOTOROLAI SEMICONDUCTOR -i--i-l-ll-ll-lellMl.TECHNICAL DATAMCI4573MCI4574MC14575.1QUAD PROGRAMMABLE ..
MC14576AP ,Dual Video AmplifiersMAXIMUM RATINGS. _This device oontai ns protection cir-Parameter Value Unit cuitry to guard against ..
MC14577AP ,Dual Video AmplifiersMOTOROLA- SEMICONDUCTOR 'TECHNICAL DATA 'Advance InformationDual Video AmplifiersCMOSEach of these ..
MC1458 ,Amplifiers and Comparatorsmaximum ratings” may cause permanent damage to the device. These are stress ratings only, andfuncti ..
MC74AC574MEL ,Octal D-Type Flip Flop with 3-State Outputsstored in the flip–flops on the LOW–to–HIGH Clock (CP) transition.PDIP–20The MC74AC574/74ACT574 is ..
MC74AC574MG , Octal D Flip−Flop with 3−State Outputs
MC74AC574MR1 ,Octal D Type Flip Flop with 3 State Outputs ** OCTAL D-TYPEFLIP-FLOP WITH* * *3-STATE OUTPUTSThe MC74AC574/74ACT574 is a high-speed, low po ..
MC74AC574N ,Octal D-Type Flip Flop with 3-State OutputsLOGIC DIAGRAMD D D D D D D D0 1 2 3 4 5 6 7CPC D C D C D C D C DC D C D C DQ Q Q Q QQ Q QOEO O O O ..
MC74AC640N ,OCTAL BIDIRECTIONAL TRANSCEIVER WITH 3-STATE OUTPUTS* ** ** ** ** OCTAL BIDIRECTIONALTRANSCEIVER WITH* * *3-STATE OUTPUTSThe MC74AC640/74ACT640 octal b ..
MC74AC646 ,Octal Transceiver/Register with 3-State Outputs (Non-inverting)Maximum Ratings are those values beyond which damage to the device may occur. Functional operation ..
MC145745FW
V.21/V.23 Telemeter Modem
Product Preview- - -
The MC145745 is a selectable modem chip compatible with ITU V.21
(300 baud full duplex asynchronous) and V.23 mode 2 (1200 baud half duplex
asynchronous). The built–in differential line driver has the capability of driving
0 dBm into a 600 Ω load with a 5 V single power supply. This device also
includes a DTMF generator, DTMF receiver, call–progress tone detector,
answer tone generator, and a receive timing control circuit.
Besides having a clock generator with a crystal oscillator connected to it, the
device has a divider circuit to which input of a double frequency clock is possible
from external sources, such as from a microcontroller unit (MCU). The serial
control port (SCP) permits the MCU to access internal registers for exercising
the built–in features.
A low consumption device, the MC145745 integrates various functions in a
small package. This modem IC is best suited for telemeter and other
applications of this type. Conforms to ITU V.21 and V.23 Recommendations DTMF Generator and Receiver for all 16 Standard Digits Capable of Driving 0 dBm into a 600 Ω Load (VCC = 5 V) Automatic Gain Control (AGC) Amplifier for the DTMF Receiver Call–Progress Tone Detector Four–Wire Serial Data Interface (SCP) Programmable Transmission and Carrier Detection Levels FSK/DTMF Analog Loopback Self–Test Function Crystal Oscillator (3.579545 MHz) and Half Divider Circuit (7.159090 MHz)
for External Inputs Operates in the Voltage Range of 3.3 – 5.5 V Power Down Mode (ICC < 1 μA)
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SEMICONDUCTOR TECHNICAL DATA
