PRA-BD11
73
5
6
7
8
5
6
7
8
C
D
F
A
B
E
NUMBER
SYMBOL
TYPE
DESCRIPTION
1-10
PD9 - PD0
I
CMOS or TTL compatible parallel data inputs. PD0 is the LSB and PD9 is the MSB.
11
PCLKIN
I
CMOS or TTL compatible parallel clock input.
12
V
EE3
-
Most negative power supply connect ion for parallel data and clock inputs.
13
V
CC3
-
Most positive power supply connect ion for parallel data and clock inputs.
14
RSV2
I
Reserved pin. Do not connect .
15, 19, 21, 27,
28, 30, 32, 37
NC
I
No connect.
16
RSV1
I
Reserved pin. Always connect to V
CC
.
17
V
CC2
-
Most positive power supply connect ion for internal logic and digital circuits.
18
V
EE2
-
Most negative power supply connect ion for internal logic and digital circuits.
20
LOCK
O
TTL level which is high when the internal PLL is locked.
22
R
SET
I
External resistor used to set the data output amplitude for SDO and SDO.
23, 26, 29
V
EE
-
Most negative power supply connect ion for shielding (not connect ed).
24, 25
SDO, SDO
O
Primary, current mode, 75 cabl e driving output (inverse and true)
31
BYPASS
I
When high, the SMPTE Scrambler and NRZ encoder a re bypasse d.
Pin Descriptions
Ω
33
RESET
I
Resets the scrambler when asserted.
34
V
CC1
-
Most positive power supply connect ion for analog circuits.
35
V
EE1
-
Most negative power supply connect ion for analog circuits.
36, 38
R
VCO
+, R
VCO
-
I
Differential VCO current setting resistor that sets the VCO frequency.
39, 43
V
EE
-
Most negative power supply connect ion (substrate).
40
LBWC
I
TTL level loop band width control that adjusts the PLL bandwidth to optimize for lowest
jitter. If the pin is set to ground the loop bandwidth i s BW
MIN
. If the pin is left floating, the
loop band width is approximately 3 BW
MIN
, if the pin is tied to V
CC
the loop bandwidths
app roximately10 BW
MIN
41, 42
LF+, LF-
I
Differential loop filter pins to optimize loop transfer performance at low loop bandwidths
(NC if not used).
44
SYNC DIS
I
Sync detect disable. Logic high di sables sync detection. Logic low allows 8 bit operation
by mapp ing 000-003 to 000 and 3FC-3FF to 3FF.
Содержание PRA-BD11
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