mcs7720 MosChip, mcs7720 Datasheet - Page 5

• Manufacturer Part Number: mcs7720
• Description: Usb-1.1 To Dual Serial Ports
• Manufacturer: MosChip

Rev. 1.1
nDTR
nDTR
nRTS
nCTS
nCTS
Name
VOUT
GND
3.3V
nRI
nRI
TX
5V
A
B
A
A
A
A
B
B
14, 17, 21,
30, 39, 47
2, 11, 16,
5, 8, 13,
31, 43
Pin
32
33
35
37
40
44
45
46
48
1
PWR
PWR
PWR
PWR
Type
O
O
O
O
I
I
I
I
Note: All names with “n” prefix are active low.
Request-To-Send signal (A).
It is set high (inactive) after a hardware reset or during internal loop-back
mode. When low, this indicates that the UART is ready to exchange
data. nRTS has no effect on the transmitter or receiver.
Serial Data Output (A).
Clear-To-Send signal (A).
When low this indicates that the modem or data set is ready to exchange
data. nCTS has no effect on the transmitter.
Data-Terminal-Ready signal (A).
It is set high (inactive) after a hardware reset or during internal loop-
back mode. When low, this output indicates to the modem or data set
that the UART is ready to establish a communication link. nDTR has
no effect on the transmitter or receiver.
Ring-Detect signal (A).
Clear-To-Send signal (B).
When low this indicates that the modem or data set is ready to exchange
data. nCTS has no effect on the transmitter.
Data-Terminal-Ready signal (B).
It is set high (inactive) after a hardware reset or during internal loop-
back mode. When low, this output indicates to the modem or data set
that the UART is ready to establish a communication link. nDTR has
no effect on the transmitter or receiver.
Ring-Detect signal (B).
+3.3V Voltage Regulator Output.
Power and signal grounds.
Device Supply inputs.
All should be connected to the VOUT pin.
The VOUT voltage is gated by RESET.
Main Power Input. Connect to USB VBUS or local VDD.
Description
USB-1.1 to Dual Serial Ports
MCS7720
Page 5