Switching Characteristics - Cypress CY62128B Specification

Switching Characteristics

Parameter
READ CYCLE
t Read Cycle Time
RC
t Address to Data Valid
AA
t Data Hold from Address Change
OHA
t CE LOW to Data Valid, CE
ACE 1
t OE LOW to Data Valid
DOE
t OE LOW to Low Z
LZOE
t OE HIGH to High Z
HZOE
t CE LOW to Low Z, CE
LZCE 1
t CE HIGH to High Z, CE
HZCE 1
t CE LOW to Power-up, CE
PU 1
t CE HIGH to Power-down, CE
PD 1
[10]
WRITE CYCLE
t Write Cycle Time
WC
t CE LOW to Write End, CE
SCE 1
t Address Set-up to Write End
AW
t Address Hold from Write End
HA
t Address Set-up to Write Start
SA
t WE Pulse Width
PWE
t Data Set-up to Write End
SD
t Data Hold from Write End
HD
t WE HIGH to Low Z
LZWE
t WE LOW to High Z
HZWE
Switching Waveforms
[12, 13]
Read Cycle No.1
ADDRESS
DATA OUT
Notes:
7. Test conditions assume signal transition time of 5 ns or less, timing reference levels of 1.5V, input pulse levels of 0 to 3.0V, and output loading of the specified
I /I and 100-pF load capacitance.
OL OH
are specified with a load capacitance of 5 pF as in (b) of AC Test Loads. Transition is measured ±500 mV from steady-state voltage.
8. t , t , and t
HZOE HZCE HZWE
9. At any given temperature and voltage condition, t
10. The internal write time of the memory is defined by the overlap of CE
and the transition of any of these signals can terminate the write. The input data set-up and hold timing should be referenced to the leading edge of the signal that terminates
the write.
11. No input may exceed V + 0.5V.
CC
12. Device is continuously selected. OE, CE
13. WE is HIGH for read cycle.
Document #: 38-05300 Rev. *C
[7]
Over the Operating Range
Description
HIGH to Data Valid
2
[7, 9]
[9]
HIGH to Low Z
2
LOW to High Z
2
HIGH to Power-up
2
LOW to Power-down
2
HIGH to Write End
2
[9]
[8, 9]
t
AA
t
OHA
PREVIOUS DATA VALID
is less than t
HZCE LZCE
1
= V , CE = V .
1 IL 2 IH
62128B-55
Min.
55
5
0
5
[8, 9]
0
55
45
45
0
0
45
25
0
5
t
RC
, t is less than t , and t is less than t
HZOE LZOE HZWE
LOW, CE HIGH, and WE LOW. CE and WE must be LOW and CE
2 1
CY62128B
MoBL
62128B-70
Max. Min. Max.
70
55 70
5
55 70
20 35
0
20 25
5
20 25
0
55 70
70
60
60
0
0
50
30
0
5
20 25
DATA VALID
for any given device.
LZWE
HIGH to initiate a write,
2
Page 5 of 11
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