CY7C408A
CY7C409A
[3, 6]
Switching Characteristics Over the Operating Range
7C408A-15
7C409A-15
7C408A-25
7C409A-25
7C408A-35
7C409A-35
Test
Parameter
Description
Operating Frequency
SI HIGH Time
Conditions Min.
Max.
Min.
Max.
Min.
Max.
Unit
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
f
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
t
t
t
t
t
t
Note 7
15
25
35
O
Note 7
Note 7
Note 8
Note 8
23
25
0
11
24
0
9
PHSI
PLSI
SSI
SI LOW Time
17
0
Data Set-Up to SI
Data Hold from SI
30
20
12
HSI
Delay, SI HIGH to IR LOW
Delay, SI LOW to IR HIGH
SO HIGH Time
35
40
21
23
15
16
DLIR
DHIR
PHSO
PLSO
DLOR
DHOR
SOR
HSO
BT
Note 7
Note 7
23
25
11
24
9
SO LOW Time
17
Delay, SO HIGH to OR LOW
Delay, SO LOW to OR HIGH
Data Set-Up to OR HIGH
Data Hold from SO LOW
Fall-through, Bubble-back Time
Data Set-Up to IR
35
40
21
23
15
16
0
0
0
0
0
0
10
5
65
10
5
60
10
5
50
Note 9
Note 9
SIR
Data Hold from IR
30
6
20
6
20
6
HIR
Input Ready Pulse HIGH
Output Ready Pulse HIGH
OE LOW to LOW Z (7C408A)
OE HIGH to HIGH Z (7C408A)
SI LOW to HF HIGH
Note 10
Note 11
Note 12
Note 7
PIR
6
6
6
POR
DLZOE
DHZOE
DHHF
DLHF
DLAFE
DHAFE
PMR
DSI
35
35
65
65
65
65
30
30
55
55
55
55
25
25
45
45
45
45
SO LOW to HF LOW
SO or SI LOW to AFE LOW
SO or SI LOW to AFE HIGH
MR Pulse Width
55
25
45
10
35
10
MR HIGH to SI HIGH
MR LOW to OR LOW
MR LOW to IR HIGH
MR LOW to Output LOW
MR LOW to AFE HIGH
MR LOW to HF LOW
SO LOW to Next Data Out Valid
55
55
55
55
55
28
45
45
45
45
45
20
35
35
35
35
35
16
DOR
DIR
Note 13
LZMR
AFE
HF
OD
Notes:
6. Test conditions assume signal transition time of 5 ns or less, timing reference levels of 1.5V and output loading of the specified IOL/IOH and 30-pF load
capacitance, as in parts (a) and (b) of AC Test Loads and Waveforms.
7. 1/fO > (tPHSI + tPLSI), 1/fO > (tPHSO + tPLSO).
8. tSSI and tHSI apply when memory is not full.
9. tSIR and tHIR apply when memory is full, SI is high and minimum bubble-through (tBT) conditions exist.
10. At any given operating condition tPIR > (tPHSO required).
11. At any given operating condition tPOR > (tPHSI required).
12. tDHZOE and tDLZOE are specified with CL = 5 pF as in part (b) of AC Test Loads and Waveforms. tDHZOE transition is measured ±500 mV from steady-state
voltage. tDLZOE transition is measured ±100 mV from steady-state voltage. These parameters are guaranteed and not 100% tested.
13. All data outputs will be at LOW level after reset goes HIGH until data is entered into the FIFO.
3