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3874
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MFG:IC D/C:AT93C46-10SU-2.7/TR

387 Series Datasheet download

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Part Number: 3874

MFG: IC

D/C: AT93C46-10SU-2.7/TR

Description: The 3874 group is the 8-bit microcomputer based on the 740 family core technology.The 3874 group includes data ...

3874 General Description

The 3874 group is the 8-bit microcomputer based on the 740 family core technology.

The 3874 group includes data link layer communication control circuit, A-D converters, D-A converter, automatic data transfer serial I/O, UART, and watchdog timer etc.

The various microcomputers in the 3874 group include variations of internal memory size and packaging. For details, refer to the section on part numbering.

For details on availability of microcomputers in the 3874 group, refer to the section on group expansion.

3874 Maximum Ratings

Symbol	Parameter	Conditions	Ratings	Unit
V_CC	Power source voltage	All voltages are based on Vss. Output transistors are cut off.	0.3 to 7.0	V
V_I	Input voltage P00P07, P10P17, P20P27, P30P37, P40P47, P50P57, P60P67, P70P77, P80P87, VREF		0.3 to Vcc +0.3	V
V_I	Input voltage RESET , XIN		0.3 to Vcc +0.3	V
V_I	Input voltage P97		0.3 to Vcc +0.3	V
V_O	Output voltage P00P07, P10P17, P20P27, P30P37, P40P47, P50P57, P60P67, P70P77, P80P87, XOUT		0.3 to Vcc +0.3	V
P_d	Power dissipation	Ta = 25	500	mW
T_opr	Operating temperature		40 to 85
T_stg	Storage temperature		60 to 150

3874 Features

`Basic machine-language instructions ............................... 71
`Minimum instruction execution time ......................... 0.32 ms
       (at 6.4 MHz oscillation frequency, in double-speed mode)
`Memory size
       ROM ....................................................... 16 K to 60 K bytes
       RAM.......................................................... 1024 to 2048 bytes
`Programmable input/output ports .................................... 72
`Input port ............................................................ 1
`Interrupts ................................................. 27 sources, 16 vectors
       (Interrupt source discrimination register exists, included key input interrupt)
`Timer 1, timer 2, timer 3 ....................................... 8-bit 5 3
`Timer X, timer Y................................................ 16-bit 5 2
`Serial I/O1 .................... 8-bit 5 1(UART or Clock-synchronized)
`Serial I/O2 ................................... 8-bit 5 1(Clock-synchronized)
`Serial I/O3 ................................................... 8-bit 5 1
       (Clock-synchronized automatic data transfer/arbitrary bit transfer function available)
`A-D converter .......................... 8-bit 5 8 channels
`D-A converter ....................................... 8-bit 5 1 channel
`Data link layer communication control circuit ...................... 1
`Clock generating circuit ........................... Built-in 2 circuits
       (connect to external ceramic resonator or quartz-crystal oscillator)
`Watchdog timer ............................................ 20-bit 5 1
`Power source voltage ............................... 3.0 to 5.5 V
`Power dissipation
       In double-speed mode ............................................90 mW
       In high-speed mode ..........................................60 mW
       (at 32 kHz oscillation frequency, at 5 V power source voltage)
       In low-speed mode ..................................... 180 mW
        (at 32 kHz oscillation frequency, at 3 V power source voltage)
`Operating temperature range.................................... 40 to 85
       (Extended operating temperature version and automotive version)

3874 Typical Application

Automotive comfort control for audio system, air conditioning etc., automotive body electronics control, household appliances, and other consumer applications, etc.

3874 Connection Diagram

3874 datasheet

387
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Datasheet: 387
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