CY7C1471BV25
CY7C1473BV25, CY7C1475BV25
Document #: 001-15013 Rev. *E Page 16 of 30
2.5V TAP AC Test Conditions
Input pulse levels.................................................VSS 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 Switching Characteristics
Over the Operating Range[9, 10]
Parameter Description Min Max Unit
Clock
tTCYC TCK Clock Cycle Time 50 ns
tTF TCK Clock Frequency 20 MHz
tTH TCK Clock HIGH Time 20 ns
tTL TCK Clock LOW Time 20 ns
Output Times
tTDOV TCK Clock LOW to TDO Valid 10 ns
tTDOX TCK Clock LOW to TDO Invalid 0 ns
Setup Times
tTMSS TMS Setup to TCK Clock Rise 5 ns
tTDIS TDI Setup to TCK Clock Rise 5 ns
tCS Capture Setup to TCK Rise 5 ns
Hold Times
tTMSH TMS Hold after TCK Clock Rise 5 ns
tTDIH TDI Hold after Clock Rise 5 ns
tCH Capture Hold after Clock Rise 5 ns
Figure 6. 2.5V TAP AC Output Load Equivalent

TDO

1.25V

20pF

Z = 50Ω

O

50Ω

TAP DC Electrical Characteristics And Operating Conditions
(0°C < TA < +70°C; VDD = 2.375 to 2.625 unless otherwise noted) [11]
Parameter Description Test Conditions Min Max Unit
VOH1 Output HIGH Voltage IOH = –1.0 mA, VDDQ = 2.5V 2.0 V
VOH2 Output HIGH Voltage IOH = –100 µA, VDDQ = 2.5V 2.1 V
VOL1 Output LOW Voltage IOL = 1.0 mA, VDDQ = 2.5V 0.4 V
VOL2 Output LOW Voltage IOL = 100 µA, VDDQ = 2.5V 0.2 V
VIH Input HIGH Voltage VDDQ = 2.5V 1.7 VDD + 0.3 V
VIL Input LOW Voltage VDDQ = 2.5V –0.3 0.7 V
IXInput Load Current GND < VIN < VDDQ –5 5 µA
Notes
9.tCS and tCH refer to the setup and hold time requirements of latching data from the boundary scan register.
10.Test conditions are specified using the load in TAP AC Test Conditions. tR/tF = 1 ns.
11.All voltages refer to VSS (GND).
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