LC74201JE
• Reading data
Set the AS/DS pin (pin 43) at low level to specify address input. Specify the address in the lowest seven bits. Set the
top bit to 1.
Set the AS/DS pin (pin 43) at high level to specify data input. Set the STB pin (pin 44) at high level to cause the LSI
to output the data.
Timing Characteristics at Ta = +25°C, DVDD1 = 4.0 V
Parameter
Minimum input pulse width
Strobe rising time
Strobe falling time
Data setup time
Data hold time
Single word read/write time
Data output propagation time
Symbol
Conditions
twH1
twL1
tr1
tf1
tsDI1
tsDI2
thDI1
thDI2
tword
tpLH1
tpHL1
STB pin high level pulse width
STB pin low level pulse width
STB pin
STB pin
AD7 to AD0 → STB pin
AS/DS → STB pin
STB → AD0 to AD7 pins
STB → AS/DS pin
AS/DS pin
AD0 to AD7 data output high propagation time
AD0 to AD7 data output low propagation time
Ratings
Unit
min
max
180
–
ns
180
–
ns
–
50
ns
–
50
ns
25
–
ns
25
–
ns
25
–
ns
25
–
ns
200
–
ns
–
150
ns
–
55
ns
Note: AD0 to AD7 use N-channel open-drain outputs. The standard values for tpLH1 and tpHL1 are for an output load capacitance of 50 pF, an external
pull-up resistor of 2.7 kΩ, and an output level of 5.0 V.
No. 5761-16/21