TLC2932_15 Datasheet, PDF (9/29 Pages) Texas Instruments – HIGH-PERFORMANCE PHASE-LOCKED LOOP

TLC2932
HIGH-PERFORMANCE PHASE-LOCKED LOOP
SLAS097E – SEPTEMBER 1994 – REVISED MAY 1997
PARAMETER MEASUREMENT INFORMATION
VCO OUT
90%
10%
90%
10%
tr
tf
Figure 3. VCO Output Voltage Waveform
FIN– A†
FIN– B†
VDD
GND
VDD
GND
PFD INHIBIT
50%
PFD OUT
tr
tPHZ
10%
90%
50%
50%
tPZH
(a) OUTPUT PULLDOWN
(see Figure 5 and Table 4)
VDD
GND
VOH
GND
90%
tPZL
50%
tf
50%
10%
tPLZ
50%
(b) OUTPUT PULLUP
(see Figure 5 and Table 4)
† _{FIN–A and FIN–B are for reference phase only, not for timing.}
Figure 4. PFD Output Voltage Waveform
VDD
GND
VDD
GND
VDD
GND
VDD
VOL
Table 4. PFD Output Test Conditions
PARAMETER
tPZH
tPHZ
tr
tPZL
tPLZ
tf
RL
1 kΩ
CL
S1
S2
Open Close
15 pF
Close Open
Test Point
PFD OUT
DUT
RL
CL
VDD
S1
S2
Figure 5. PFD Output Test Conditions
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