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VM-802-ECE-KAAN-156M250 Datasheet(PDF) 5 Page - Vectron International, Inc |
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VM-802-ECE-KAAN-156M250 Datasheet(HTML) 5 Page - Vectron International, Inc |
5 / 8 page Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com Package and Pinout Table 4. Pinout Pin # Symbol Function 1 E/D or NC Enable/Disable 2 NC No Connection 3 GND Electrical and Lid Ground 4f O Output Frequency 5Cf O Complementary Output Frequency 6V DD Supply Voltage HCSL Application Diagrams The VM-802 incorporates a standard High Speed Current Logic, HCSL ,output scheme which is a 15mA current source switched between Out and Comple- mentary Out. Being un-terminated drains, as shown in Figure 8, they require external 50 ohm resistors to ground as shown in Figure 9. HCSL is a high im- pedance output with quick switching times, in can be advantageous to use a 10 to 30 ohm series resistor as shown in Figure 10, to help reduce overshoot/ ringing. Figure 8. Standard HCSL Output Configuration Figure 9. Single Resistor Termination Scheme Figure 10. In some cases a 10-30 ohm series resistor is used to help reduce overshoot. One of the most important considerations is terminating the Output and Complementary Outputs equally. An unused output should not be left un-termi- nated, and if it one of the two outputs is left open it will result in excessive jitter on both. PC board layout must take this and 50 ohm impedance matching into account. Load matching and power supply noise are the main contributors to jitter related problems. 15mA Page5 50 Ω 50 Ω 1 6 2 5 3 4 Z L =50 ohms Z L =50 ohms 50 Ω 1 6 2 5 3 4 50 Ω Z L =50 ohms Z L =50 ohms 10-30 Ω 10-30 Ω Contact Pads are Gold flash (0.003 um min ) over Palladium (0.01-0.15um) over Nickel (0.508-2.032um) Figure 7. Pad Layout Units: mm (inches) 3.2±0.05 [0.126±0.002] 0.85±0.05 [0.033±0.002] 5.0±0.05 [0.197±0.002] 1.27 [0.050] 0.64±0.05 [0.025±0.002] Figure 6. Package Outline Drawing Figure 7. Pad Layout Power Supply cap is required 1.27 [0.050] 1.2 [0.047] 0.64 [0.025] 1.1 [0.043] Via to GND Via to Supply |
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