CY7C419/21/25/29/33
Document #: 38-06001 Rev. *B Page 5 of 25
Switching Characteristics Over the Operating Range
[7, 8]
7C419–10
7C421–10
7C425–10
7C429–10
7C433–10
7C419–15
7C421–15
7C425–15
7C429–15
7C433–15
7C420–20
7C421–20
7C424–20
7C425–20
7C428–20
7C429–20
7C433–20
7C420–25
7C421–25
7C424–25
7C425–25
7C429–25
7C432–25
7C433–25
Parameter Description Min. Max. Min. Max. Min. Max. Min. Max. Unit
t
RC
Read Cycle Time 20 25 30 35 ns
t
A
Access Time 10 15 20 25 ns
t
RR
Read Recovery Time 10 10 10 10 ns
t
PR
Read Pulse Width 10 15 20 25 ns
t
LZR
[6,9]
Read LOW to Low Z 3 3 3 3 ns
t
DVR
[9,10]
Data Valid After Read HIGH 5 5 5 5 ns
t
HZR
[6,9,10]
Read HIGH to High Z 15 15 15 18 ns
t
WC
Write Cycle Time 20 25 30 35 ns
t
PW
Write Pulse Width 10 15 20 25 ns
t
HWZ
[6,9]
Write HIGH to Low Z 5 5 5 5 ns
t
WR
Write Recovery Time 10 10 10 10 ns
t
SD
Data Set-Up Time 6 8 12 15 ns
t
HD
Data Hold Time 0 0 0 0 ns
t
MRSC
MR Cycle Time 20 25 30 35 ns
t
PMR
MR Pulse Width 10 15 20 25 ns
t
RMR
MR Recovery Time 10 10 10 10 ns
t
RPW
Read HIGH to MR HIGH 10 15 20 25 ns
t
WPW
Write HIGH to MR HIGH 10 15 20 25 ns
t
RTC
Retransmit Cycle Time 20 25 30 35 ns
t
PRT
Retransmit Pulse Width 10 15 20 25 ns
t
RTR
Retransmit Recovery Time 10 10 10 10 ns
Notes:
7. Test conditions assume signal transition time of 3 ns or less, timing reference levels of 1.5V and output loading of the specified I
OL
/I
OH
and 30 pF load
capacitance, as in part (a) of AC Test Load and Waveforms, unless otherwise specified.
8. See the last page of this specification for Group A subgroup testing information.
9. t
HZR
transition is measured at +200 mV from V
OL
and –200 mV from V
OH
. t
DVR
transition is measured at the 1.5V level. t
HWZ
and t
LZR
transition is measured
at ±100 mV from the steady state.
10.t
HZR
and t
DVR
use capacitance loading as in part (b) of AC Test Load and Waveforms.
