sy89423v Micrel Semiconductor, sy89423v Datasheet - Page 3

• Manufacturer Part Number: sy89423v
• Description: Sy89423v Dual High Performance Phase Locked Loop
• Manufacturer: Micrel Semiconductor

Micrel
M9999-091707
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F1A
F2A
RINA
RINA
FINA
FINA
HFINA
HFINA
FOUTA
FOUTA
HFOUTA
HFOUTA
F1B
F2B
RINB
RINB
FINB
FINB
HFINB
HFINB
FOUTB
FOUTB
HFOUTB
HFOUTB
V
V
V
V
S1A
S2A
S3A
S1B
S2B
S3B
S4B
S5B
PIN NAMES
CC
CCOA
CCOB
EE
Pin
Filter Pin 1A
Filter Pin 2A
Inverted Reference Input A
Reference Input A
Feedback Input A
Inverted Feedback Input A
High Frequency Input A
Inverted High Frequency Input A
Frequency Output A
Inverted Frequency Output A
High Frequency Output A
Inverted High Frequency Output A
Filter Pin 1B
Filter Pin 2B
Reference Input B
Inverted Reference Input B
Feedback Input B
Inverted Feedback Input B
High Frequency Input B
Inverted High Frequency Input B
Frequency Output B
Inverted Frequency Output B
High Frequency Output B
Inverted Frequency Output B
V
Output V
Output V
V
Select Input 1A (TTL)
Select Input 2A (TTL)
Select Input 3A (TTL)
Select Input 1B (TTL)
Select Input 2B (TTL)
Select Input 3B (TTL)
Select Input 4B (TTL)
Select Input 5B (TTL)
CC
EE
(0V)
CC
CC
Function
I/O
I/O
I/O
I/O
I/O
—
—
—
—
O
O
O
O
O
O
O
O
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
3
RINA, RINA, RINB, RINB
Reference frequency inputs for loop A and B. These are
differential signal pairs and may be driven differentially or
single-ended.
FINA, FINA, FINB, FINB
Feedback frequency inputs for loop A and B. These are
differential signal pairs and may be driven differentially or
single-ended.
HFINA, HFINA, HFINB, HFINB
High frequency feedback inputs. Differential drive is
recommended.
F1A, F2A, F1B, F2B
These pins are connection points for the loop filters, which are
to be provided off-chip. F1X is the high impedance side, F2X
is the reference side. The loop filter should be a first order, low
pass with a DC block. The difference voltage on these pins will
be a DC level, which is controlled by the loop feedback and
determined by the required VCO frequency.
FOUTA, FOUTA, FOUTB, FOUTB
Frequency outputs for the loops. These are differential, positive
referenced, emitter-follower signals and must be terminated
off-chip. Termination in 50 ohms is recommended.
HFOUTA, HFOUTA, HFOUTB, HFOUTB
High frequency outputs. These are differential, positive
referenced, emitter-follower signals and must be terminated
off-chip. Termination in 50 ohms is recommended.
S1A, S2A, S3A, S1B, S2B, S3B, S4B, S5B
These inputs are used to select the configuration for PLLA and
PLLB. See the Frequency Selection Table for details of the
logic.
V
This is the positive supply for the chip. It should be decoupled
and present a low impedance in order to assure low-jitter
operation.
V
These are the positive supplies for the output buffers. They are
constrained to be equal to or less than the value of V
V
This pin is the negative supply for the chip and is normally
connected to ground (0V).
CC
CCOA
EE
PIN DESCRIPTION
, V
CCOB
Precision Edge
SY89423V
CC
.
®