CY7C4231-25JC データシートの表示（PDF） - Cypress Semiconductor
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CY7C4231-25JC Datasheet PDF : 21 Pages
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CY7C4421/4201/4211/4221
CY7C4231/4241/4251
Functional Description (continued)
The CY7C42X1 provides four status pins: Empty, Full, Almost Empty,
Almost Full. The Almost Empty/Almost Full flags are programmable
to single word granularity. The programmable flags default to
Empty – 7 and Full – 7.
The flags are synchronous, i.e., they change state relative to
either the read clock (RCLK) or the write clock (WCLK). When
Selection Guide
Maximum Frequency (MHz)
Maximum Access Time (ns)
Minimum Cycle Time (ns)
Minimum Data or Enable Set-Up (ns)
Minimum Data or Enable Hold (ns)
Maximum Flag Delay (ns)
Active Power Supply
Current (ICC1)
Commercial
Industrial
7C42X1-10
100
8
10
3
0.5
8
35
40
entering or exiting the Empty and Almost Empty states, the
flags are updated exclusively by the RCLK. The flags denoting
Almost Full, and Full states are updated exclusively by WCLK.
The synchronous flag architecture guarantees that the flags
maintain their status for at least one cycle
All configurations are fabricated using an advanced 0.65µ
N-Well CMOS technology. Input ESD protection is greater than
2001V, and latch-up is prevented by the use of guard rings.
7C42X1-15
66.7
10
15
4
1
10
35
40
7C42X1-25
40
15
25
6
1
15
35
40
7C42X1-35
28.6
20
35
7
2
20
35
40
Density
CY7C4421
64 x 9
CY7C4201
256 x 9
CY7C4211
512 x 9
Maximum Ratings
(Above which the useful life may be impaired. For user guide-
lines, not tested.)
Storage Temperature ...................................–65°C to +150°C
Ambient Temperature with
Power Applied ...............................................–55°C to +125°C
Supply Voltage to Ground Potential ............... –0.5V to +7.0V
DC Voltage Applied to Outputs
in High Z State ............................................... –0.5V to +7.0V
DC Input Voltage............................................ –3.0V to +7.0V
Output Current into Outputs (LOW) ............................. 20 mA
CY7C4221
1K x 9
CY7C4231
2K x 9
CY7C4241
4K x 9
CY7C4251
8K x 9
Static Discharge Voltage ........................................... >2001V
(per MIL-STD-883, Method 3015)
Latch-Up Current..................................................... >200 mA
Operating Range
Range
Ambient
Temperature
Commercial
Industrial[1]
0°C to +70°C
–40°C to +85°C
Note:
1. TA is the “instant on” case temperature.
VCC
5V ± 10%
5V ± 10%
2
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