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SM3508

Features: • ROM capacity : Program ROM 12 k x 23 bits Character ROM 6 x 8 x 256 bits Constant ROM 1 k x 4 bits• RAM capacity : Working RAM 256 x 4 bitsDisplay RAM 74 x 16 bits Data RAM 3 k x 8 bits• Memory expansion (external) : 1M x 8 bits x 3• LCD display : 74-segment x ...

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SeekIC No. : 004493718 Detail

SM3508: Features: • ROM capacity : Program ROM 12 k x 23 bits Character ROM 6 x 8 x 256 bits Constant ROM 1 k x 4 bits• RAM capacity : Working RAM 256 x 4 bitsDisplay RAM 74 x 16 bits Data RAM ...

SM3508 Data Sheet

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Part Number:
SM3508
Supply Ability:
5000

Price Break

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

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Upload time: 2025/12/25

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Product Details

Description



Features:

• ROM capacity :
             Program ROM     12 k x 23 bits
             Character ROM   6 x 8 x 256 bits
             Constant ROM    1 k x 4 bits
• RAM capacity :
             Working RAM      256 x 4 bits
             Display RAM        74 x 16 bits
             Data RAM            3 k x 8 bits
• Memory expansion (external) : 1M x 8 bits x 3
• LCD display : 74-segment x 16-common
• I/O ports :
             Parallel I/O          8 bits
             Input                   2 bits
             Output                 2 bits
             Buzzer output     1 bit (4 kHz)
             Key input             6 bits
• Standby release : 2 events (2 Hz signal, key input)
• Built-in oscillator :
             System clock (built-in CR oscillator)     1 MHz
                          (external ceramic resonator)  1 MHz
             Timer (built-in CR oscillator)                 32.8 kHz
                          (external crystal)                    32.768 kHz
• Instruction cycle time : 3 µs
• Operating temperature : 10 to + 60
• Supply voltage : 2.5 to 5.5 V
• Package : 128-pin QFP (QFP128-P-2828)
                                       [Test Sample only]


Description

The SM3508 is a CMOS 4-bit single-chip micro-computer for databank incorporating data memory RAM, LCD driver (the output is adjustable in 16 steps for various contrast), key/switch input circuit,8-bit parallel I/O port, 2 output ports and buzzer output circuit. The chip also has memory expansion controlling feature. One of two ports contains spe-cial output circuit for infrared (IR) communication.By connecting an external crystal, a 1Hz timer is made possible for easier clock function.




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