CD74ACT297_14 Datasheet, PDF (7/18 Pages) Texas Instruments – DIGITAL PHASE-LOCKED LOOP

CD74ACT297
DIGITAL PHASE-LOCKED LOOP
SCHS297D – AUGUST 1998 – REVISED JUNE 2002
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
TA = 25°C
MIN MAX
MIN MAX UNIT
IO = –50 µA
4.5 V
4.4
4.4
VOH
VI = VIH or VIL
IO = –24 mA
IO = –75 mA
IO = 50 µA
4.5 V
5.5 V
4.5 V
3.4
3.1
V
3.3
0.1
0.1
VOL
II
ICC (MSI)
ICC (SSI/FF)
VI =VIH or VIL
VI = VCC or GND
VI = VCC or GND
VI = VCC or GND
IO = 24 mA
IO = 75 mA^†
4.5 V
5.5 V
5.5 V
5.5 V
5.5 V
0.9
1.1 V
2.9
±0.1
±1 mA
8
80 mA
4
40 mA
DICC
VI = VCC –2.1 V
4.5 V to 5.5 V
2.4
2.8 mA
† _{Test one output at a time for a 1-second maximum duration. Measurement is made by forcing current and measuring voltage to minimize power}
dissipation. Test verifies a minimum 50-Ω transmission-line drive capability at 85°C.
ACT INPUT LOAD
INPUT
UNIT
LOAD^†
ENCTR, D/U
0.1
A, B, C, D, K CLK, φA2 0.2
I/D CLK, φA1, φB
0.5
† _{Unit Load is ∆ICC limit specified in}
electrical characteristics table (e.g.,
2.4 mA at 25°C).
timing requirements over recommended supply-voltage range and recommended operating
free-air temperature range (unless otherwise noted)
PARAMETER
fclock Clock frequency
tw
Pulse duration
tsu
Setup time before K CLK↑
th
Hold time after K CLK↑
K CLK
I/D CLK
K CLK
I/D CLK
D/U
ENCTR
D/U
ENCTR
TA = 25°C
MIN MAX
55
40
6
7
13
12
3
2
MIN MAX UNIT
45
MHz
35
8
ns
9
17
ns
16
7
ns
6
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