LAN8720A-CP SMSC, LAN8720A-CP Datasheet - Page 69

• Manufacturer Part Number: LAN8720A-CP
• Description: TXRX ETHERNET 10/100 RMII
• Manufacturer: SMSC
• Type: Transceiverr

Specifications of LAN8720A-CP

• Number Of Drivers/receivers: 4/4
• Protocol: RMII
• Voltage - Supply: 1.6 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: 24-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 638-1080

Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
SMSC LAN8720A/LAN8720Ai
5.5.2
SYMBOL
t
t
pon
poff
Magnetics
VDD1A,
Power Sequence Timing
This diagram illustrates the device power sequencing requirements. The VDDIO, VDD1A, VDD2A and
magnetics power supplies can turn on in any order provided they all reach operational levels within
the specified time period t
0 volts within the specified time period p
Note: When the internal regulator is disabled, a power-up sequencing relationship exists between
VDD2A
VDDIO
Power supply turn on time
Power supply turn off time
Power
VDDCR and the 3.3V power supply. For additional information refer to
"REGOFF: Internal +1.2V Regulator Configuration," on page
Table 5.7 Power Sequence Timing Values
DESCRIPTION
Figure 5.2 Power Sequence Timing
pon
t
pon
. Device power supplies can turn off in any order provided they all reach
DATASHEET
off
.
69
MIN
32.
t
poff
TYP
Revision 1.2 (11-10-10)
MAX
500
50
Section 3.7.3,
UNITS
mS
mS