Datasheet

CY74FCT821T
10-BIT BUS-INTERFACE REGISTER
WITH 3-STATE OUTPUTS
SCCS033B– MAY 1994 – REVISED NOVEMBER 2001
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
timing requirements over recommended operating free-air temperature range (unless otherwise
noted) (see Figure 1)
PARAMETER
TEST LOAD
CY74FCT821AT CY74FCT821BT CY74FCT821CT
UNIT
PARAMETER
TEST
LOAD
MIN MAX MIN MAX MIN MAX
UNIT
t
w
Pulse duration CP
C
L
= 50 pF,
R
L
= 500 Ω
7 6 6 ns
t
su
Setup time, before CP↑
Data
C
L
= 50 pF,
R
L
= 500 Ω
4 3 3 ns
t
h
Hold time, after CP↑
Data
C
L
= 50 pF,
R
L
= 500 Ω
2 1.5 1.5 ns
switching characteristics over operating free-air temperature range (see Figure 1)
PARAMETER
FROM TO
TEST LOAD
CY74FCT821AT CY74FCT821BT CY74FCT821CT
UNIT
PARAMETER
(INPUT) (OUTPUT)
TEST
LOAD
MIN MAX MIN MAX MIN MAX
UNIT
t
PLH
CP
Y
C
L
= 50 pF,
10 7.5 6
ns
t
PHL
CP
Y
L
,
R
L
= 500 Ω
10 7.5 6
ns
t
PLH
CP
Y
C
L
= 300 pF,
20 15 12.5
ns
t
PHL
CP
Y
L
,
R
L
= 500 Ω
20 15 12.5
ns
t
PZH
OE
Y
C
L
= 50 pF,
12 8 7
ns
t
PZL
OE
Y
L
,
R
L
= 500 Ω
12 8 7
ns
t
PZH
OE
Y
C
L
= 300 pF,
23 15 12.5
ns
t
PZL
OE
Y
L
,
R
L
= 500 Ω
23 15 12.5
ns
t
PHZ
OE
Y
C
L
= 5 pF,
7 6.5 6
ns
t
PLZ
OE
Y
L
,
R
L
= 500 Ω
7 6.5 6
ns
t
PHZ
OE
Y
C
L
= 50 pF,
8 7.5 6.5
ns
t
PLZ
OE
Y
L
R
L
= 500 Ω
8 7.5 6.5
ns