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Operating voltage range: 2.3V~5.5V.
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Operating temperature range: -40C~85C.
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Operating frequency range( base on 2 clocks)
* Crystal mode: DC~20MHz at 5V, DC~8MHz at 3V, DC~4MHz at 2.3V.
* RC mode: DC~4MHz at 5V, DC~4MHz at 3V, DC~4MHz at 2.3V.
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Low power consumption:
* Less then 2.2 mA at 5V/4MHz
* Typically 30 µA, at 3V/32KHz
* Typically 1 µA, during sleep mode
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4K x 13 bits on chip ROM
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One security register to prevent intrusion of OTP memory codes
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One configuration register to accommodate userˇs requirements
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148⊙ 8 bits on chip registers(SRAM, general purpose register)
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3 bi-directional I/O ports
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5 level stacks for subroutine nesting
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8-bit real time clock/counter (TCC) with selective signal sources, trigger edges, and
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overflow interrupt
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Two clocks per instruction cycle
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Power down (SLEEP) mode
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Two available interruptions
* TCC overflow interrupt
* External interrupt
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Programmable free running watchdog timer
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10 programmable pull-high pins
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2 programmable open-drain pins
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2 programmable R-option pins
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Package types:
* 20 pin DIP 300 mil : EM78P447SDP
* 20 pin SOP 300 mil : EM78P447SDM
* 24 pin Skinny DIP 300 mil : EM78P447SCK
* 24 pin SOP 300 mil : EM78P447SCM
* 28 pin DIP 600 mil : EM78P447SAP
* 28 pin Skinny DIP 300 mil : EM78P447SAK
* 28 pin SOP (SOIC) 300 mil : EM78P447SAM
* 28 pin SSOP 209 mil : EM78P447SAS
* 32 pin DIP 600 mil : EM78P447SBP
* 32 pin SOP (SOIC) 450 mil : EM78P447SBWM
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99.9% single instruction cycle commands
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The transient point of system frequency between HXT and LXT is around 400KHz
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