Datasheet

 2014 Microchip Technology Inc. DS20005292A-page 61
MCP2221
FIGURE 4-1: POR AND POR REARM WITH SLOW RISING VDD
VDD
VPOR
VPORR
VSS
VSS
NPOR
(1)
TPOR
(3)
POR REARM
Note 1: When NPOR is low, the device is held in Reset.
2: T
POR 1µs typical.
3: T
VLOW 2.7 µs typical.
TVLOW
(2)
TABLE 4-1: USB MODULE SPECIFICATIONS
DC Characteristics
Operating Conditions (unless otherwise indicated):
3.0V VDD  5.5V at -40C  TA  +85C (I-Temp)
Param.
No.
Characteristic Sym. Min. Typ. Max. Units Conditions
D313 USB Voltage Vusb 3.0 — 3.6 V Voltage on V
USB pin must be
in this range for proper USB
operation
D314 Input Leakage on Pin Iil — — ± 1 μAV
SS VPIN VDD pin at
high-impedance
D315 Input Low Voltage
for USB Buffer
Vilusb — — 0.8 V For V
USB range
D316 Input High Voltage
for USB Buffer
Vihusb 2.0 — — V For V
USB range
D318 Differential Input
Sensitivity
Vdifs — — 0.2 V The difference between D+
and D- must exceed this value
while V
CM is met
D319 Differential Common
Mode Range
Vcm 0.8 — 2.5 V
D320 Driver Output
Impedance
(1)
Zout 28 — 44 W
D321 Voltage Output Low Vol 0.0 — 0.3 V 1.5 kload connected to 3.6V
D322 Voltage Output High Voh 2.8 — 3.6 V 1.5 kload connected to
ground
Note 1: The D+ and D- signal lines have been built-in impedance matching resistors. No external resistors, capacitors or
magnetic components are necessary on the D+/D- signal paths between the MCP2221 family device and the
USB cable.