Tap ac test conditions – Cypress CY7C1387DV25 User Manual
Page 14
CY7C1386DV25, CY7C1386FV25
CY7C1387DV25, CY7C1387FV25
Document Number: 38-05548 Rev. *E
Page 14 of 30
TAP AC Test Conditions
Input pulse levels .................................................V
SS
to 2.5V
Input rise and fall time..................................................... 1 ns
Input timing reference levels .........................................1.25V
Output reference levels.................................................1.25V
Test load termination supply voltage.............................1.25V
TAP AC Output Load Equivalent
TAP AC Switching Characteristics
Over the Operating Range
Parameter
Description
Min.
Max.
Unit
Clock
t
TCYC
TCK Clock Cycle Time
50
ns
t
TF
TCK Clock Frequency
20
MHz
t
TH
TCK Clock HIGH time
20
ns
t
TL
TCK Clock LOW time
20
ns
Output Times
t
TDOV
TCK Clock LOW to TDO Valid
10
ns
t
TDOX
TCK Clock LOW to TDO Invalid
0
ns
Setup Times
t
TMSS
TMS Setup to TCK Clock Rise
5
ns
t
TDIS
TDI Setup to TCK Clock Rise
5
ns
t
CS
Capture Setup to TCK Rise
5
ns
Hold Times
t
TMSH
TMS Hold after TCK Clock Rise
5
ns
t
TDIH
TDI Hold after Clock Rise
5
ns
t
CH
Capture Hold after Clock Rise
5
ns
TDO
1.25V
20pF
Z = 50
Ω
O
50
Ω
TAP DC Electrical Characteristics And Operating Conditions
(0°C < TA < +70°C; V
DD
= 2.5V ±0.165V unless otherwise noted)
Parameter
Description
Test Conditions
Min.
Max.
Unit
V
OH1
Output HIGH Voltage
I
OH
= –1.0 mA
1.7
V
V
OH2
Output HIGH Voltage
I
OH
= –100 µA
2.1
V
V
OL1
Output LOW Voltage
I
OL
= 1.0 mA
0.4
V
V
OL2
Output LOW Voltage
I
OL
= 100 µA
0.2
V
V
IH
Input HIGH Voltage
1.7
V
DD
+ 0.3
V
V
IL
Input LOW Voltage
–0.3
0.7
V
I
X
Input Load Current
GND < V
IN
< V
DDQ
–5
5
µA
Note
11. t
CS
and t
CH
refer to the setup and hold time requirements of latching data from the boundary scan register.
12. Test conditions are specified using the load in TAP AC test conditions. t
R
/t
F
= 1ns.
13. All voltages referenced to V
SS
(GND).