NS7520B-1-C36 Digi International, NS7520B-1-C36 Datasheet - Page 29

• Manufacturer Part Number: NS7520B-1-C36
• Description: IC ARM MICROPROCESSOR 177BGA
• Manufacturer: Digi International
• Series: NET+ARM®r

Specifications of NS7520B-1-C36

• Applications: Network Processor
• Core Processor: ARM7
• Program Memory Type: External Program Memory
• Controller Series: -
• Ram Size: External
• Interface: EBI/EMI, Ethernet, DMA, SPI, UART
• Number Of I /o: 16
• Voltage - Supply: 1.4 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 177-LFBGA
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

A C c h a r a c t e r i s t i c s
Figure 6: Internal pulldown characteristics
AC characteristics
AC electrical specifications define the timing relationship between signals for interfaces and modes
within a given interface.
AC electrical specifications
The AC electrical specifications are based on the system configuration shown in Figure 7, with a
5pF allowance for PCB capacitance and a 0.25 ns allowance for PCB delay. The timing of the
buffers, SDRAM, and the like must be added to complete timing analysis. In systems where SDRAM is
not used, two devices are expected to replace the SDRAMs shown in Figure 7; that is, they are tied
directly to the chip. System loading information is shown in Table 7: "System loading details" on
page 26.
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