NS7520B-1-C36 Digi International, NS7520B-1-C36 Datasheet - Page 319

• 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

Most open drain power monitors require a speedup circuit in order to meet the fall/
rise timing. This next example shows RESET speed up with open drain monitor:
An external RESET_N source with a rise time exceeding 18ns (0.8V to 2.0V) should
use a Schmitt trigger speedup circuit such as 74LVC2G14.
3.3V
Internal 5K Pull-up
Monitor with Open
Drain output
3
U1
VCC
1
2
Monitor with
Active output
FM1233A
U3
GND
RST
MAX811S
RST
MR
+V
4
3
2
3.3V
RST_N
1
2
NC
U4
74LVC1G04
1
2
3
74LVC2G04
U2
1A
GND
2A
w w w . d i g i e m b e d d e d . c o m
VCC
1Y
2Y
5
4
3
3.3V
6
5
4
3.3V
L13
A10
L13
A10
N S 7 5 2 0 E r r a t a
SCANEN_N
RESET_N
SCANEN_N
RESET_N
NS7520
NS7520
RESET_N
RESET_N
3 0 7