概览
描述
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. Excellent phase noise performance is maintained with Renesas’ fourth-generation FemtoClock™ NG PLL technology.
特性
- Fourth-generation FemtoClock NG PLL technology
- 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 - Selectable clock input or crystal input
- Supports 25MHz fundamental crystal or 25MHz, 50MHz, 66.67MHz clock input
- Selectable 156.25MHz, 125MHz, and 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 to 20MHz): 0.199ps (typical)
- Power supply modes:
Core/Output
3.3V/3.3V
3.3V/2.5V
2.5V/2.5V - -40 °C to 85 °C ambient operating temperature
- 56-lead VFQFN
- Lead-free (RoHS 6) packaging
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应用
设计和开发
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