LMK00304 Datasheet, PDF (3/25 Pages) Texas Instruments – 3-GHz 4-Output Differential Clock Buffer/Level Translator

6.0 Pin Descriptions
Pin #
DAP
1, 8 17, 24
Pin Name(s)
DAP
GND
2, 5
3, 4
6, 7
9, 32
V_CCOA
CLKoutA0, CLKoutA0*
CLKoutA1, CLKoutA1*
CLKout_TYPE0, CLKout_TYPE1
10, 28
Vcc
11
12
13, 16
14, 15
18, 19
20, 23
21, 22
25
26, 27
29
30
31
OSCin
OSCout
CLKin_SEL0, CLKin_SEL1
CLKin0, CLKin0*
CLKoutB1*, CLKoutB1
V_CCOB
CLKoutB0*, CLKoutB0
NC
CLKin1*, CLKin1
REFout
V_CCOC
REFout_EN
Type
GND
GND
PWR
O
O
I
PWR
I
O
I
I
O
PWR
O
—
I
O
PWR
I
Description
Die Attach Pad. Connect to the PCB ground plane for heat dissipation.
Ground
Power supply for Bank A Output buffers. V_CCOA operates from 3.3 V or 2.5
V. The V_CCOA pins are internally tied together. Bypass with a 0.1 uF low-
ESR capacitor placed very close to each Vcco pin. (Note 1)
Differential clock output A0. Output type set by CLKout_TYPE pins.
Differential clock output A1. Output type set by CLKout_TYPE pins.
Bank A and Bank B output buffer type selection pins (Note 2)
Power supply for Core and Input Buffer blocks. The Vcc supply operates
from 3.3 V. Bypass with a 0.1 uF low-ESR capacitor placed very close to
each Vcc pin.
Input for crystal. Can also be driven by a XO, TCXO, or other external
single-ended clock.
Output for crystal. Leave OSCout floating if OSCin is driven by a single-
ended clock.
Clock input selection pins (Note 2)
Universal clock input 0 (differential/single-ended)
Differential clock output B1. Output type set by CLKout_TYPE pins.
Power supply for Bank B Output buffers. V_CCOB operates from 3.3 V or 2.5
V. The V_CCOB pins are internally tied together. Bypass with a 0.1 uF low-
ESR capacitor placed very close to each Vcco pin. (Note 1)
Differential clock output B0. Output type set by CLKout_TYPE pins.
Not connected internally. Pin may be floated, grounded, or otherwise tied
to any potential within the Supply Voltage range stated in the Section 8.0
Absolute Maximum Ratings.
Universal clock input 1 (differential/single-ended)
LVCMOS reference output. Enable output by pulling REFout_EN pin high.
Power supply for REFout buffer. V_CCOC operates from 3.3 V or 2.5 V.
Bypass with a 0.1 uF low-ESR capacitor placed very close to each Vcco
pin. (Note 1)
REFout enable input. Enable signal is internally synchronized to selected
clock input. (Note 2)
Note 1: The output supply voltages or pins (V_CCOA, V_CCOB, and V_CCOC) will be called V_CCO in general when no distinction is needed, or when the output supply
can be inferred from the output bank/type.
Note 2: CMOS control input with internal pull-down resistor.
Note 3: Any unused output pins should be left floating with minimum copper length (Note 5), or properly terminated if connected to a transmission line, or disabled/
Hi-Z if possible. See Section 7.3 Clock Outputs for output configuration and Section 14.3 Termination and Use of Clock Drivers for output interface and termination
techniques.
3
www.ti.com