Datasheet

 2015 Microchip Technology Inc. DS20005292B-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: TPOR 1 µs 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 V
USB 3.0 — 3.6 V Voltage on the VUSB pin must
be in this range for proper
USB operation
D314 Input Leakage on Pin I
IL ——±1μAVSS  VPIN  VDD pin at
high impedance
D315 Input Low Voltage
for USB Buffer
V
ILUSB ——0.8VFor VUSB range
D316 Input High Voltage
for USB Buffer
V
IHUSB 2.0 — — V For VUSB range
D318 Differential Input
Sensitivity
V
DIFS — — 0.2 V The difference between D+
and D- must exceed this value
while VCM 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 V
OL 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.