NJU9214 NJR Corporation, NJU9214 Datasheet - Page 24

• Manufacturer Part Number: NJU9214
• Description: 4·3/4 Digit Single Chip Digital Multimeter Lsi
• Manufacturer: NJR Corporation

NJU9214
Buzzer Output Frequency
NOTE4 : LCD Diving Voltage ( Example of output waveform )
NOTE5 : Terminals of digital line are protected by the ESD protection circuit, however
(2) Switching characteristic
Relay driver pulse width
Data transmission rate
LCD driver frequency
PARAMETER
Waveform of 1/4 Duty, DC400mV range, VIN = 0mV
COM1
COM2
COM4
SEG1
SEG2
COM3
SEG3
SEG4
terminals of analog line aren't protected enough because the parasitic capacitance
must be decreased. Therefore, if the NJU9214 is given static electricity, it may
be permanent breakdown. Therefore enough external surge protection is needed
for assembling, carrying and keeping.
VDSP
VDD
VDSP
VDD
VDSP
VDD
VDSP
VDD
VDSP
VDD
VDSP
VDD
VDSP
VDD
VDSP
VDD
( VDDA = VDDD = +5.0V, VSSA = –5.0V, AGND = DGND = 0V, DC4V range, fXT=4MHz, Ta=25°C )
SYMBOL
FLCD
t
FBZ
twrd
OUT
terminal
TXD
COM1 to 4 terminal
1 cycle
RD1 to 4 terminal
CONDITIONS
SEG1 to 28,
BZ terminal
( TXS : H )
( TXS : L )
MIN
–
–
–
–
–
2400
9600
TYP
2.0
50
10
MAX
–
–
–
–
–
UNIT
kHz
bps
ms
Hz