74AC11590_09 Datasheet, PDF (6/10 Pages) Texas Instruments – 8-BIT BINARY COUNTER WITH REGISTERED 3-STATE OUTPUTS

74AC11590
ą
8ĆBIT BINARY COUNTER
WITH REGISTERED 3ĆSTATE OUTPUTS
SCAS194 − D3988, MARCH 1992 − REVISED APRIL 1993
timing requirements over recommended operating free-air temperature range, V_CC = 5 V ± 0.5 V
(unless otherwise noted) (see Figure 1)
TA = 25°C
MIN MAX
MIN MAX UNIT
fclock
tw
Clock frequency, CCK or RCK
Pulse duration
CCK or RCK high or low
CCLR low
0
80
0
80 MHz
6.3
6.3
ns
4.9
4.9
CCKEN low before CCK↑
3.7
3.7
tsu
Setup time
CCLR high before CCK↑
1.6
CCK↑ before RCK↑^†
5.5
1.6
ns
5.5
th
Hold time
CCKEN low after CCK↑
0.5
0.5
ns
† _{This setup time ensures that the register will see stable data from the counter outputs. The clocks may be tied together, in which case the register}
will be one clock pulse behind the counter.
switching characteristics over recommended operating free-air temperature range,
V_CC = 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
TA = 25°C
MIN
MIN TYP MAX
fmax
tPLH
tPHL
CCK or RCK
CCK
RCO
50
50
7 13.5 15.9
7
9 16.9 19.5
9
tPLH
CCLR
RCO
6.2 12.4 14.8 6.2
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPLH
tPHL
RCK
OE
OE
CCKEN
Q
Q
Q
RCO
7.3 13.7 16.2 7.3
7 13.6 15.9
7
7.8 15.5 18.5 7.8
8.5 18.2 21.4 8.5
6.3
10 11.9 6.3
6.8 10.8 12.8 6.8
6 11.7
14
6
6 11.6 13.7
6
MAX
18.3
22.1
17.1
18.7
17.9
21.1
24.5
13.2
14.1
16.2
15.4
UNIT
MHz
ns
ns
ns
ns
ns
ns
switching characteristics over recommended operating free-air temperature range,
V_CC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
TA = 25°C
MIN
MIN TYP MAX
fmax
tPLH
tPHL
CCK or RCK
CCK
RCO
80
80
3.6 7.8 10.2 3.6
4.7 9.8 12.7 4.7
tPLH
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
CCLR
RCK
OE
OE
RCO
Q
Q
Q
3.2 7.2 9.5 3.2
3.7
8 10.4 3.7
3.6 8.2 10.7 3.6
3.8 8.9 11.9 3.8
3.7 9.5 12.6 3.7
4.5 7.5 9.4 4.5
5.4 8.7 10.8 5.4
MAX
11.7
14.4
10.9
12
12.1
13.6
14.3
10.5
12
UNIT
MHz
ns
ns
ns
ns
ns
2−6
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