JAJSDV4J June 2009 – January 2017 OMAP-L138
PRODUCTION DATA.
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The minimum stackup required for routing the device is a six layer stack as shown in Table 6-28. Additional layers may be added to the PCB stack up to accommodate other circuitry or to reduce the size of the PCB footprint.Complete stack up specifications are provided in Table 6-29.
LAYER | TYPE | DESCRIPTION |
---|---|---|
1 | Signal | Top Routing Mostly Horizontal |
2 | Plane | Ground |
3 | Plane | Power |
4 | Signal | Internal Routing |
5 | Plane | Ground |
6 | Signal | Bottom Routing Mostly Vertical |
NO. | PARAMETER | MIN | TYP | MAX | UNIT |
---|---|---|---|---|---|
1 | PCB Routing/Plane Layers | 6 | |||
2 | Signal Routing Layers | 3 | |||
3 | Full ground layers under DDR2/mDDR routing region | 2 | |||
4 | Number of ground plane cuts allowed within DDR routing region | 0 | |||
5 | Number of ground reference planes required for each DDR2/mDDR routing layer | 1 | |||
6 | Number of layers between DDR2/mDDR routing layer and reference ground plane | 0 | |||
7 | PCB Routing Feature Size | 4 | Mils | ||
8 | PCB Trace Width w | 4 | Mils | ||
8 | PCB BGA escape via pad size | 18 | Mils | ||
9 | PCB BGA escape via hole size | 8 | Mils | ||
10 | Device BGA pad size(1) | ||||
11 | DDR2/mDDR Device BGA pad size(2) | ||||
12 | Single Ended Impedance, Zo | 50 | 75 | Ω | |
13 | Impedance Control(3) | Z-5 | Z | Z+5 | Ω |