CY7C277 查看數據表（PDF） - Cypress Semiconductor
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CY7C277 Datasheet PDF : 13 Pages
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CY7C277
Capacitance[4]
Parameter
CIN
COUT
Description
Input Capacitance
Output Capacitance
Test Conditions
TA = 25°C, f = 1 MHz,
VCC = 5.0V
AC Test Loads and Waveforms[4]
5V
OUTPUT
R1 500Ω
(658Ω MIL)
5V
OUTPUT
R1 500Ω
(658Ω MIL)
30 pF
INCLUDING
R2
333Ω
5 pF
(403Ω MIL)
INCLUDING
R2
333Ω
(403Ω MIL)
JIG AND
JIG AND
SCOPE
SCOPE
(a) NormalLoad
(b) High Z Load
3.0V
GND
< 5 ns
Max.
Unit
10
pF
10
pF
ALL INPUT PULSES
90%
10%
90%
10%
< 5 ns
Equivalent to:
THÉVENIN EQUIVALENT
OUTPUT
200Ω
Commercial
2.0V
OUTPUT
250Ω
Military
1.9V
CY7C277 Switching Characteristics Over the Operating Range[3, 4]
7C277-30
Parameter
Description
Min. Max.
tAL
Address Set-Up to ALE Inactive
tLA
Address Hold from ALE Inactive
tLL
ALE Pulse Width
tSA
Address Set-Up to Clock HIGH
tHA
Address Hold from Clock HIGH
tSES
ES Set-Up to Clock HIGH
tHES
ES Hold from Clock HIGH
tCO
Clock HIGH to Output Valid
tPWC
tLZC[7]
Clock Pulse Width
Output Valid from Clock HIGH
tHZC
tLZE[8]
tHZE[8]
Output High Z from Clock HIGH
Output Valid from E LOW
Output High Z from E HIGH
Notes:
7. Applies only when the synchronous (ES) function is used.
8. Applies only when the asynchronous (E) function is used.
5
10
10
30
0
12
5
15
15
15
15
15
15
7C277-40
Min. Max.
10
10
10
40
0
15
10
20
20
20
20
20
20
7C277-50
Min. Max.
10
15
15
50
0
15
10
25
20
30
30
30
30
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Document #: 38-04006 Rev. **
Page 3 of 13
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