CY7C4255-25AC Cypress Semiconductor Corp, CY7C4255-25AC Datasheet - Page 5

• Manufacturer Part Number: CY7C4255-25AC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C4255-25AC

• Density: 128Kb
• Word Size: 18b
• Sync/async: Synchronous
• Expandable: Yes
• Package Type: TQFP
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 64
• Lead Free Status / Rohs Status: Not Compliant

Document #: 38-06004 Rev. *C
AC Test Loads and Waveforms
Switching Characteristics
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
Notes:
Parameter
10. C
11. Pulse widths less than minimum values are not allowed.
12. Values guaranteed by design, not currently tested.
13. t
S
A
CLK
CLKH
CLKL
DS
DH
ENS
ENH
RS
RSR
RSF
PRT
RTR
OLZ
OE
OHZ
WFF
REF
PAFasynch
PAFsynch
PAEasynch
PAEsynch
HF
XO
9. C
OUTPUT
PAFasynch
L
L
= 30 pF for all AC parameters except for t
= 5 pF for t
INCLUDING
5V
JIG AND
SCOPE
, t
PAEasynch
Clock Cycle Frequency
Data Access Time
Clock Cycle Time
Clock HIGH Time
Clock LOW Time
Data Set-Up Time
Data Hold Time
Enable Set-Up Time
Enable Hold Time
Reset Pulse Width
Reset Recovery Time
Reset to Flag and Output Time
Retransmit Pulse Width
Retransmit Recovery Time
Output Enable to Output in Low Z
Output Enable to Output Valid
Output Enable to Output in High Z
Write Clock to Full Flag
Read Clock to Empty Flag
Clock to Programmable Almost-Full Flag
Clock to Programmable Almost-Full Flag
Clock to Programmable Almost-Empty Flag
Clock to Programmable Almost-Full Flag
Clock to Half-Full Flag
Clock to Expansion Out
(Asynchronous mode, V
(Synchronous mode, V
(Asynchronous mode, V
(Synchronous mode, V
OHZ
C
L
.
, after program register write will not be valid until 5 ns + t
R1 1.1 K Ω
R2
680Ω
Description
[11]
Over the Operating Range
CC
CC
CC
CC
OHZ
/SMODE tied to V
/SMODE tied to V
/SMODE tied to V
/SMODE tied to V
[9, 10]
.
Equivalent to:
[12]
[12]
[13]
[13]
SS
SS
OUTPUT
CC
CC
THÉ VENIN EQUIVALENT
)
)
)
)
Min.
7C42X5-10
4.5
4.5
0.5
0.5
PAF(E)
10
10
30
60
2
3
3
8
0
3
3
GND
3.0V
.
≤ 3 ns
Max.
100
10
12
12
12
8
7
7
8
8
8
8
6
410Ω
Min.
7C42X5-15
15
15
10
35
65
2
6
6
4
1
4
1
0
3
3
ALL INPUT PULSES
10%
90%
Max.
66.7
15
10
10
10
10
16
10
16
10
16
1.91V
8
8
7C42X5-25
Min.
25
10
10
25
15
45
75
2
6
1
6
1
0
3
3
Max.
40
15
25
12
12
15
15
20
15
20
15
20
15
90%
10%
Min.
7C42X5-35
≤ 3 ns
35
14
14
20
85
35
55
2
7
2
7
2
0
3
3
CY7C4255
CY7C4265
Max.
Page 5 of 22
28.6
20
35
15
15
20
20
25
20
25
20
25
20
MHz
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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