Switching characteristics – Cypress CY62167EV18 User Manual
Page 5
CY62167EV18 MoBL
®
Document #: 38-05447 Rev. *G
Page 5 of 13
Switching Characteristics
Over the Operating Range
Parameter
Description
55 ns
Unit
Min
Max
Read Cycle
t
RC
Read Cycle Time
55
ns
t
AA
Address to Data Valid
55
ns
t
OHA
Data Hold from Address Change
10
ns
t
ACE
CE
1
LOW and CE
2
HIGH to Data Valid
55
ns
t
DOE
OE LOW to Data Valid
25
ns
t
LZOE
OE LOW to Low-Z
5
ns
t
HZOE
OE HIGH to High-Z
18
ns
t
LZCE
CE
1
LOW and CE
2
HIGH to Low-Z
10
ns
t
HZCE
CE
1
HIGH and CE
2
LOW to High-Z
18
ns
t
PU
CE
1
LOW and CE
2
HIGH to Power Up
0
ns
t
PD
CE
1
HIGH and CE
2
LOW to Power Down
55
ns
t
DBE
BLE/BHE LOW to Data Valid
55
ns
t
LZBE
BLE/BHE LOW to Low-Z
10
ns
t
HZBE
BLE/BHE HIGH to High-Z
18
ns
Write Cycle
t
WC
Write Cycle Time
55
ns
t
SCE
CE
1
LOW and CE
2
HIGH
to Write End
40
ns
t
AW
Address Setup to Write End
40
ns
t
HA
Address Hold from Write End
0
ns
t
SA
Address Setup to Write Start
0
ns
t
PWE
WE Pulse Width
40
ns
t
BW
BLE/BHE LOW to Write End
40
ns
t
SD
Data Setup to Write End
25
ns
t
HD
Data Hold from Write End
0
ns
t
HZWE
WE LOW to High-Z
20
ns
t
LZWE
WE HIGH to Low-Z
10
ns
Notes
13. Test conditions for all parameters other than tri-state parameters are based on signal transition time of 1V/ns, timing reference levels of V
CC(typ)
/2, input pulse levels
of 0 to V
CC(typ)
, and output loading of the specified I
OL
/I
OH
as shown in
AC Test Loads and Waveforms on page 4
14. AC timing parameters are subject to byte enable signals (BHE or BLE) not switching when chip is disabled. See
for further clarification.
15. At any given temperature and voltage condition, t
HZCE
is less than t
LZCE
, t
HZBE
is less than t
LZBE
, t
HZOE
is less than t
LZOE
, and t
HZWE
is less than t
LZWE
for any given
device.
16. t
HZOE
, t
HZCE
, t
HZBE
, and t
HZWE
transitions are measured when the output enters a high impedance state.
17. The internal memory write time is defined by the overlap of WE, CE
1
= V
IL
, BHE and/or BLE = V
IL
, and CE
2
= V
IH
. All signals must be ACTIVE to initiate a write and
any of these signals can terminate a write by going INACTIVE. The data input setup and hold timing must be referenced to the edge of the signal that terminates the write.