Datasheet

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   
    
SCBS123F − AUGUST 1992 − REVISED APRIL 2004
23
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
timing requirements over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (normal mode) (see Figure 14)
SN54ABT8646 SN74ABT8646
UNIT
MIN MAX MIN MAX
UNIT
f
clock
Clock frequency CLKAB or CLKBA 0 100 0 100 MHz
t
w
Pulse duration CLKAB or CLKBA high or low 3 3 ns
t
su
Setup time A before CLKAB↑ or B before CLKBA↑ 4.7 4.5 ns
t
h
Hold time A after CLKAB↑ or B after CLKBA↑ 0 0 ns
timing requirements over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (test mode) (see Figure 14)
SN54ABT8646 SN74ABT8646
UNIT
MIN MAX MIN MAX
UNIT
f
clock
Clock frequency TCK 0 50 0 50 MHz
t
w
Pulse duration TCK high or low 5 5 ns
A, B, CLK, DIR, OE, or S before TCK↑ 7 5
t
su
Setup time
TDI before TCK↑
6 6
ns
t
su
Setup time
TMS before TCK↑ 6 6
ns
A, B, CLK, DIR, OE, or S after TCK↑ 0 0
t
h
Hold time
TDI after TCK↑
0 0
ns
t
h
Hold time
TMS after TCK↑ 0 0
ns
t
d
Delay time Power up to TCK↑ 50* 50 ns
t
r
Rise time V
CC
power up 1* 1 µs
* On products compliant to MIL-PRF-38535, this parameter is not production tested.