产品导览

特征

• Operating voltage range: 2.5V~5.5V
• Operating temperature range: -40°C~85°C
• Operating frequency range (base on 2 clocks ): 
  ‧ Crystal mode: DC~20MHz at 5V, DC~8MHz at 3V, DC~4MHz at 2.5V. 
  ‧ ERC mode: DC~4MHz at 5V, DC~4MHz at 3V, DC~4MHz at 2.5V.
• Low power consumption: 
  ‧ Less then 2 mA at 5V/4MHz 
  ‧ Typically 20 µA at 3V/32KHz 
  ‧ Typically 1 µA during sleep mode
• 1K x 13 bits on chip ROM
• One security register to prevent intrusion of OTP memory codes
• One configuration register to accommodate user's requirements
• 48 x 8 bits on chip registers (SRAM, general purpose register)
• 2 bi-directional I/O ports
• 5 level stacks for subroutine nesting
• 8-bit real time clock/counter (TCC) with selective signal sources, trigger edges, and overflow interrupt
• Two clocks per instruction cycle
• Power down (SLEEP) mode
• Three available interruptions 
  ‧ TCC overflow interrupt 
  ‧ Input-port status changed interrupt (wake up from sleep mode) 
  ‧ External interrupt
• Programmable free running watchdog timer
• 8 programmable pull-high pins
• 7 programmable pull-down pins
• 8 programmable open-drain pins
• 2 programmable R-option pins
• Package types: 
  ‧ 14 pin DIP 300mil : EM78P157NBP 
  ‧ 14 pin SOP 150mil : EM78P157NBM 
  ‧ 18 pin DIP 300mil : EM78P157NAP 
  ‧ 18 pin SOP 300mil : EM78P157NAM 
  ‧ 20 pin SSOP 209mil : EM78P157NAAS 
  ‧ 20 pin SSOP 209mil : EM78P157NAKM
• 99.9% single instruction cycle commands
• The transient point of system frequency between HXT and LXT is around 400KHz

Note: Green products do not contain hazardous substances.