Datasheet > 8T49N012I

8T49N012I

更新时间： 2024-11-06 14:57:31

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
29页	853K
描述
FemtoClock? NG Crystal-to-3.3V, 2.5V LVPECL/LVCMOS Clock Generator with Fanout Buffer

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数据手册

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8T49N012I 数据手册

FemtoClock^®NG Crystal-to-3.3V, 2.5V

LVPECL/LVCMOS Clock Generator with

Fanout Buffer

8T49N012

DATA SHEET

Features

General Description

• Fourth Generation FemtoClock NG PLL technology

The 8T49N012 is a high performance Clock Generator with

selectable LVPECL or Single-ended outputs. The 8T49N012 can

generate selectable frequencies from a crystal or a single-ended

reference clock. The frequency is selected from the Frequency

Selection Table.

• Three differential output banks:

Bank A: selectable between four pairs of LVPECL or four pairs

of complementary LVCMOS/LVTTL outputs

Bank B: two pairs of LVPECL outputs

Bank C: six pairs of LVPECL outputs

Excellent phase noise performance is maintained with IDT’s Fourth

Generation FemtoClock^®NG PLL technology.

• Selectable clock input or crystal input.

• Supports 25MHz fundamental crystal or 25MHz, 50MHz,

66.67MHz clock input

• Selectable 156.25MHz, 125MHz, 100MHz clock for Bank B and

Bank C outputs

• Selectable 156.25MHz, 125MHz, 100MHz, 250MHz, 312.5MHz,

50MHz, 25MHz, 62.5MHz or 78.125MHz for Bank A outputs

• PLL lock indication (LVCMOS output)

• RMS phase jitter at 156.25MHz (12kHz - 20MHz): 0.199ps (typical)

• Power supply modes:

Core / Output

3.3V / 3.3V

Pin Assignment

3.3V / 2.5V

2.5V / 2.5V

• -40°C to 85°C ambient operating temperature

• 56-Lead VFQFN

• Lead-free (RoHS 6) packaging

44 43

46 45

56 55 54 53 52 51 50 49 48

V_CC

QC0

nQC0

QC1

XTAL_SEL

PS_SEL

V_CCA

nQC1

V_{CCO_C}

QC2

V_EE

NA_DIV1

NA_DIV0

V_{CC_X}

nQC2

V_EE

8T49N012

34 QC3

XTAL_OUT 10

XTAL_IN

V_EE12

nQC3

QC4

nQC4

QC5

CLK_IN

nOE_B

nQC5

20 21

27 28

25 26

15 16 17 18 19

22 23

56-Lead VFQFN, 8.0mm x 8.0mm x 0.9mm

8T49N012 REVISION 1 08/21/14

12 3 4 5 6 7...29

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