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参数资料
| 型号： | LC74201E |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP128 |
| 封装： | QFP-128 |
| 文件页数： | 8/21页 |
| 文件大小： | 334K |
| 代理商： | LC74201E |
Reading data
Drive 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.
Drive the AS/DS pin (pin 43) at high level to specify data I/O.
Drive the STB pin (pin 44) at high level to cause the LSI to write the data.
1-2 Timing characteristics at Ta = +25
°C, DV
DD1 = 3.7 V
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 to up resistor of 2.7 k
, and an output level of 5.0 V.
No. 5684-16/21
LC74201E
Parameter
Symbol
Conditions
Ratings
Unit
min
max
Minimum input pulse width
twH1
STB pin high level pulse width
180
–
ns
twL1
STB pin low level pulse width
180
–
ns
Strobe rising time
tr1
STB pin
–
50
ns
Strobe falling time
tf1
STB pin
–
50
ns
Data setup time
tsDI1
AD7 to AD0
→ STB pin
25
–
ns
tsDI2
AS/DS
→ STB pin
25
–
ns
Data hold time
thDI1
STB
→ AD0 to AD7 pin
25
–
ns
thDI2
STB
→ AS/DS pin
25
–
ns
Single to word read/write time
tword
AS/DS pin
200
–
ns
Data output propagation time
tpLH1
AD0 to AD7 data output high propagation time
–
150
ns
tpHL1
AD0 to AD7 data output low propagation time
–
55
ns
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