LMK00304SQ/NOPB

IC CLK BUFFER 3:5 3.1GHZ 32WQFN

LMK00304 is a 3-GHz 4-output differential ultra-low additive jitter clock buffer/level translator in a 32-lead WQFN package, supporting LVPECL, LVDS, and HCSL outputs, with an operating temperature range of -40°C to +85°C.Checked against the datasheet

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Technical parameters

Key specs

Max frequency3.1 GHzMax · 3.1 GHz (Vcco = 3.3 V ± 5%，RT = 160 Ω to GND，VOD ≥ 400 mV)

Outputs4

Supply voltage3.15 ~ 3.45 V

Datasheet-verified parameters

16 items

Parameter	Value and test conditions	Source
Maximum Output Frequency	3.1 GHz (Vcco = 3.3 V ± 5%, RT = 160 Ω to GND, VOD ≥ 400 mV)
Number of Outputs	4 Differential Outputs (2 Banks of 2) + 1 LVCMOS Output
Supply Voltage	VCC: 3.15 V to 3.45 V; VCCO: 2.5 V ± 5% or 3.3 V ± 5%
Package	WQFN (32) 5.00 mm × 5.00 mm
Operating Temperature	-40°C to +85°C
Grade	Industrial
RoHS	Yes
Recommended Operating Conditions	TA: -40°C to 85°C; TJ: Max 125°C; VCC: 3.15 V to 3.45 V; VCCO: 2.5 V ± 5% or 3.3 V ± 5%
Absolute Maximum Ratings	VCC, VCCO: -0.3 V to 3.6 V; TSTG: -65°C to +150°C; TJ: Max +150°C
Additive RMS Jitter	20 fs RMS (10 kHz to 1 MHz) with LMK03806 source at 156.25 MHz
Power Supply Rejection Ratio (PSRR)	-65 / -76 dBc (LVPECL/LVDS) at 156.25 MHz
Input Types	LVPECL, LVDS, CML, SSTL, HSTL, HCSL, or Single-Ended
Output Types	LVPECL, LVDS, HCSL, or Hi-Z (Selectable)
ESD Protection	HBM: ±2000 V; CDM: ±750 V
Storage Temperature	-65°C to +150°C
Junction Temperature	Max 125°C (Recommended), Max 150°C (Absolute)

All parameters (17)ExpandCollapse

Power
Voltage - Supply	3.15V ~ 3.45V
AC and DC characteristics
Frequency - Max	3.1 GHz
Environment and package
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 85°C
Package / Case	32-WFQFN Exposed Pad
Supplier Device Package	32-WQFN (5x5)
Other
Base Product Number	LMK00304
Differential - Input:Output	Yes/Yes
Input	CML, HCSL, HSTL, LVDS, LVPECL, SSTL, Crystal
Manufacturer	Texas Instruments
Number of Circuits	1
Output	HCSL, LVCMOS, LVDS, LVPECL
Packaging	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®
Part Status	Active
Ratio - Input:Output	3:5
Series	-
Type	Fanout Buffer (Distribution), Multiplexer, Translator

Pinout and package

PackageWQFN (32) 5.00 mm × 5.00 mm

Pin	Name	Function
11		OSCin (Crystal Input)
12		OSCout (Crystal Output)
25	NC	(Not Connected)
29		REFout (LVCMOS Reference Output)
30	VCCOC	(REFout Output Power Supply)
31		REFout_EN (REFout Enable)
1, 8, 17, 24	GND	(Ground)
10, 28	VCC	(Core Power Supply)
13, 16		CLKin_SEL0, CLKin_SEL1 (Clock Input Selection)
14, 15		CLKin0, CLKin0* (Universal Clock Input 0)
18, 19		CLKoutB1*, CLKoutB1 (Differential Clock Output B1)
2, 5	VCCOA	(Bank A Output Power Supply)
20, 23	VCCOB	(Bank B Output Power Supply)
21, 22		CLKoutB0*, CLKoutB0 (Differential Clock Output B0)
26, 27		CLKin1*, CLKin1 (Universal Clock Input 1)
3, 4		CLKoutA0, CLKoutA0* (Differential Clock Output A0)
6, 7		CLKoutA1, CLKoutA1* (Differential Clock Output A1)
9, 32		CLKout_TYPE0, CLKout_TYPE1 (Output Type Selection)
DAP	DAP	(Die Attach Pad / Ground)

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DatasheetDatasheet · 2.0 MB · 2026-10-27

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