NJU3553 Datasheet, PDF (11/17 Pages) New Japan Radio – 4-BIT SINGLE CHIP OTP MICRO CONTROLLER

NJU3553
s ELECTRICAL CHARACTERISTICS AC CHARACTERISTICS 2 SERIAL INTERFACE
PARAMETER
SYM
BOL
CONDITIONS
Serial Operating
Frequency
f_SC
Internal Clock
External Clock
Clock Pulse Width
Low-Level
t_SCL
Internal Clock
V_DD=2.7~3.6V
f_OSC=2MHz
V_DD=3.6~5.5V
f_OSC=4MHz
External Clock
V_DD=2.7~3.6V
Clock Pulse Width
High-Level
t_SCH
Internal Clock
f_OSC=2MHz
V_DD=3.6~5.5V
f_OSC=4MHz
External Clock
SDI setup Time
To SCK
t_DS
SDI Hold time
To SCK
t_DH
SDO Data
Fix Time To SCK
t_DCD
* The dividing ratio of the internal clock is 1/2.
(V_SS=0V, V_DD=2.7~5.5V, Ta= -20~75°C)
MIN
TYP
MAX UNIT
(1/12)×f_OSC* _Hz
500k
3.0
1.5
µs
1.0
3.0
1.5
µs
1.0
0.5
µs
0.5
µs
0.5
µs
s AC CHARACTERISTICS 2 SERIAL INTERFACE TIMING CHART
SCK
1/f_SC
t_SCL
t_SCH
V_IH1
V_IL1
SDI(O)
SDO/SDI(O)
t_DS
t_DH
INPUT DATA
V_IH1
V_IL1
t_DCD
V_OH
V_OL1
OUTPUT DATA
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