m21315 Mindspeed Technologies, m21315 Datasheet - Page 9

• Manufacturer Part Number: m21315
• Description: M21315 Hd/sd-sdi Auto-rate Reclocker W/4 1 Selector
• Manufacturer: Mindspeed Technologies

Table 1-1.
Table 1-2.
21315-DSH-001-B
NOTES:
1.
2.
AUTO_BYPASS
MAN_BYPASS
DDO_MUTE
Pin Name
Center Pad
Pin Name
Internal pull-up/pull-down is 100 K
NAME/RSVD Indicates additional features of the M21315 that are mapped to the reserved pins of the GS1535. When left floating as
recommended by the GS1535 data sheet, the M21315 defaults to a pin for pin and functionally compatible mode.
AV
LBW_INC
LPF/LPF
DD_VCO
V
V
NC
DD
SS
Control/Interface/Low-Speed Pins (2 of 2)
Power Pins
4,8,12,16,23,31,
32,37,42,43,48,
29,35,38,39,
40,45,54,55,
56,57,58,59
22,41,47,61
49,60,64
Pin #
62,63
Pin #
20
19
36
34
30
—
Ω.
Input control signal that automatically bypasses the data directly from
the input to the output if the Reclocker PLL can NOT lock to the incoming
data stream.
AUTO_BYPASS = High: Auto bypass reclocker if lock is not achieved
AUTO_BYPASS = Low: Reclocker continues to attempt data lock but
output data BER may be high.
Input control signal used to force a reclocker PLL bypass regardless of
the setting of the AUTO_BYPASS signal.
MAN_BYPASS = High: Force bypass (regardless of Autobypass state)
MAN_BYPASS = Low: Enables normal AUTO_BYPASS operation
Input control signal that forces the DDO/DDO outputs to logic low states.
DDO-MUTE = High: Normal output operation
DDO-MUTE = Low: Forces output to a logic low state
Loop Filter inputs on GS1535 that are left FLOATING on M21315.
Loop filter is internal. Leave pins floating.
Input control signal used to increase the loop bandwidth (LBB) of the
M21315. LBW_INC pin 34 can be used alone to increase the LBW of the
M21315 as a GS1575B compatible function.
LBW_INC = 0: 3.5 MHz HD LBW, 1.0 MHz SD LBW
LBW_INC = 1: (default) 1.5 MHz HD LBW, 0.52 MHz SD LBW
No internal connection.
Power Supply Ground
Positive Power Supply
VCO Power Supply
This pin should be connected to a “quiet” power supply.
Ground
Mindspeed Technologies
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Function
Function
®
Functional Description
Internal pull down
Internal pull up
Internal pull up
Internal pull up
Default
—
—
Power
Power
Power
Power
Type
I- CMOS
I-CMOS
I-CMOS
I-CMOS
Analog
Type
—
3