EM78P221/2N
8-Bit Microcontroller with OTP ROM
Product Specification (V1.0) 10.19.2007 • 53
(This specification is subject to change without further notice)
7 Absolute Maximum Ratings
Items Rating
Temperature under bias -40°C to 85°C
Storage temperature -65°C to 150°C
Input voltage Vss-0.3V to Vdd+ 0.5V
Output voltage Vss-0.3V to Vdd+0.5V
Working Voltage 2.3V to 5.5V
Working Frequency DC to 16MHz
8 DC Electrical Characteristics
Ta= 25°C, VDD= 5.0V, VSS= 0V
Symbol Parameter Condition Min. Typ. Max. Unit
Crystal: VDD to 5V Two cycles with two clocks DC − 16 MHz
FXT
ERC: VDD to 5V R: 5.1KΩ, C: 100 pF F±30% 850 F±30%kHz
VIHRC Input High Threshold
Voltage (Schmitt Trigger) OSCI in RC mode − 3.75 − V
VILRC Input Low Threshold Voltage
(Schmitt Trigger) OSCI in RC mode − 1.25 − V
IIL Input Leakage Current
for input pins VIN = VDD, VSS –1.0 0 1.0 μA
VIH1 Input High Volt age
(Schmitt Trigger) Ports 5, 6, 7, 8 − 3.75 − V
VIL1 Input Low Voltage
(Schmitt Trigger) Ports 5, 6, 7, 8 − 1.25 − V
VIHT1 Input High Thresho ld
Voltage (Schmitt Trigger) /RESET − 1.9 − V
VILT1 Input Low Threshold Voltage
(Schmitt Trigger) /RESET − 1.2 − V
VIHT2 Input High Thresho ld
Voltage (Schmitt Trigger) T CC, INT − 3.75 − V
VILT2 Input Low Threshold Voltage
(Schmitt Trigger) TCC, INT − 1.25 − V
VIHX1 Clock Input High Voltage OSCI in crystal mode − 3.75 − V
VILX1 Clock Input Low Voltage OSCI in crystal mode − 1.25 − V
IOH1 Output High Voltage
(Ports 5, 6, 7, 8) VOH = 0.9VDD − -9 − mA
IOH2 Output High Voltage
(Ports 6) VOH = 0.7VDD − -27 − mA
IOL1 Output Low Voltage
(Ports 5, 6, 7, 8 ) VOL = 0.1VDD − 16.8 − mA
IOL2 Output Low Voltage
(Ports 5, 6) VOL = 0.3VDD − 67.2 − mA