SN74LVT8980A-EP Datasheet, PDF (29/37 Pages) Texas Instruments – EMBEDDED TEST-BUS CONTROLLER IEEE STD 1149.1 (JTAG) TAP MASTERS WITH 8-BIT GENERIC HOST INTERFACES

SN74LVT8980AĆEP
EMBEDDED TESTĆBUS CONTROLLER
IEEE STD 1149.1 (JTAG) TAP MASTERS WITH 8ĆBIT GENERIC HOST INTERFACES
SCBS761A − JUNE 2003 − REVISED OCTOBER 2003
timing requirements over recommended operating free-air temperature range (unless otherwise
noted) (see Figures 9 and 10)
fclock Clock frequency, CLKIN
tw
Pulse duration
tsu
Setup time
th
Hold time
CLKIN high or low
RST low
STRB low
A before STRB↓
D before STRB↑
R/W before STRB↓
TDI before CLKIN↑
A after STRB↑
D after STRB↑
R/W after STRB↑
TDI after CLKIN↑
TCK = CLKIN (CDIV = 0)
TCK = CLKIN/2 (CDIV = 1)
TCK ≤ CLKIN/4 (CDIV ≥ 2)
TCK = CLKIN (CDIV = 0)
TCK = CLKIN/2 (CDIV = 1)
TCK ≤ CLKIN/4 (CDIV ≥ 2)
Read or write (R/W high or low)
Write (R/W low)
Read or write (R/W high or low)
Write (R/W low)
VCC = 3.3
± 0.3 V
MIN MAX
0
20
0
40
0
70
25
12.5
7.1
10
8
10
5
5
5
5
15
6
10
VCC = 2.7 V
MIN MAX
0
16
0
32
0
64
31
15.6
7.8
10
8
10
5
5
5
5
15
6
10
UNIT
MHz
ns
ns
ns
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