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NB7L216MNG Datasheet(PDF) 9 Page - ON Semiconductor |
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NB7L216MNG Datasheet(HTML) 9 Page - ON Semiconductor |
9 / 12 page NB7L216 http://onsemi.com 9 APPLICATION INFORMATION All NB7L216 inputs can accept PECL, CML, LVTTL, LVCMOS and LVDS signal levels. The limitations for differential input signal (LVDS, PECL, or CML) are minimum input swing of 75 mV and the maximum input swing of 2500 mV. Within these conditions, the input voltage can range from VCC to 1.2 V. Examples interfaces are illustrated below in a 50 W environment (Z = 50 W). For output termination and interface, refer to application note AND8020/D. Table 7. INTERFACING OPTIONS Interfacing Options Connections CML Connect VTD and VTD to VCC (See Figure 18) LVDS Connect VTD and VTD Together (See Figure 20) AC−COUPLED Bias VTD and VTD Inputs within Common Mode Range (VCMR) (See Figure 19) RSECL, PECL, NECL Standard ECL Termination Techniques (See Figure 13) LVTTL, LVCMOS An External Voltage (VTHR) should be Applied to the Unused Complementary Differential Input. Nominal VTHR is 1.5 V for LVTTL and VCC / 2 for LVCMOS Inputs. This Voltage must be within the VTHR Specification. (See Figure 21) 50 W VCC D D 50 W NB7L216 VCC VTD VEE VCC Q 50 W 50 W CML Driver VEE Figure 18. CML to NB7L216 Interface Q Z = 50 W Figure 19. PECL to NB7L216 Interface 50 W VCC VCC PECL Driver D D 50 W NB7L216 VEE VBias* VTD VEE RT RT VEE VCC RT 5.0 V 290 W 3.3 V 150 W 2.5 V 80 W Recommended RT Values VTD VCC VTD VBias* Z = 50 W Z = 50 W Z = 50 W C C *VBias must be within common mode range limits (VCMR) |
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