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SN54ALS299 Datasheet(PDF) 5 Page - Texas Instruments

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Part No. SN54ALS299
Description  8-BIT UNIVERSAL SHIFT/STORAGE REGISTERS WITH 3-STATE OUTPUTS
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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SN54ALS299 Datasheet(HTML) 5 Page - Texas Instruments

   
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SN54ALS299, SN74ALS299
8-BIT UNIVERSAL SHIFT/STORAGE REGISTERS
WITH 3-STATE OUTPUTS
SDAS220B – DECEMBER 1982 – REVISED DECEMBER 1994
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
timing requirements over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
SN54ALS299
SN74ALS299
UNIT
MIN
MAX
MIN
MAX
UNIT
fclock
Clock frequency (at 50% duty cycle)
0
17
0
30
MHz
t
Pulse duration
CLK high or low
22
16.5
ns
tw
Pulse duration
CLR low
12
10
ns
S0 or S1
25
20
t
Setup time before CLK
Serial or parallel data
High
18
16
ns
tsu
Serial or parallel data
Low
15
6
ns
Inactive-state setup time before CLK
↑†
CLR
15
15
th
Hold time after CLK
S0 or S1
0
0
ns
th
Hold time after CLK
Serial or parallel data
0
0
ns
† Inactive-state setup time is also referred to as recovery time.
switching characteristics (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
R1 = 500
,
R2 = 500
,
TA = MIN to MAX‡
UNIT
SN54ALS299
SN74ALS299
MIN
MAX
MIN
MAX
fmax
17
30
MHz
tPLH
CLK
QQ
2
19
4
13
ns
tPHL
CLK
QA– QH
4
25
7
19
ns
tPLH
CLK
Q
′ or Q ′
2
21
5
15
ns
tPHL
CLK
QA
′ or QH′
4
25
8
18
ns
tPHL
CLR
QA –QH
6
29
6
22
ns
tPHL
CLR
QA
′ or QH′
6
29
6
22
ns
tPZH
OE1 OE2
QQ
5
22
6
16
ns
tPZL
OE1, OE2
QA – QH
6
27
8
22
ns
tPZH
S0 S1
QQ
5
27
7
17
ns
tPZL
S0, S1
QA – QH
6
26
8
22
ns
tPHZ
OE1 OE2
QQ
1
15
1
8
ns
tPLZ
OE1, OE2
QA – QH
4
38
5
15
ns
tPHZ
S0 S1
QA QH
1
16
1
12
ns
tPLZ
S0, S1
QA – QH
4
34
8
25
ns
‡ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.


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