MIC2550A Datasheet, PDF (2/11 Pages) Micrel Semiconductor – Universal Serial Bus Transceiver

MIC2550A
Pin Configuration
VIF 1
SPD 2
RCV 3
VP 4
VM 5
NC 6
GND 7
14 VBUS
13 NC
12 VTRM
11 D+
10 D–
9 OE#
8 SUS
14-Pin TSSOP (TM)
Micrel, Inc.
16 15 14 13
SPD 1
12 VTRM
RCV 2
11 _D+
VP 3
10 D–
VM 4
9 OE#
5678
16-Pin MLF™ (ML)
Pin Description
Pin Name
VIF
Pin Number
MIC2550ABTS
1
Pin Number
MIC2550ABML
15
SPD
2
1
RCV
3
2
VP
4
3
VM
5
4
NC
GND
SUS
6, 13
7
8
5, 8, 13 16
6
7
OE#
9
9
D–
10
10
D+
11
11
VTRM
12
12
VBUS
14
14
Pin Function
System Interface Supply Voltage (Input): Determines logic voltage levels for
system interface signaling to logic controller.
Speed (Input): Edge rate control. Logic high selects full-speed edge rates.
Logic low selects low-speed edge rates.
Receive Data (Output): System interface receive data interface to logic
controller.
Plus (Input/Output): System interface signal to logic controller. If OE# is
logic 1, VP is a receiver output (+); If OE# is logic 0, VP is a driver input (+).
Minus (Input/Output): System interface signal to logic controller. If OE# is
logic 1, VM is a receiver output (–); If OE# is logic 0, VM is a driver input (–).
Not internally connected
Ground: Power supply return and signal reference.
Suspend (Input): Logic high turns off internal circuits to reduce supply
current.
Output Enable (Input): Active low system interface input signal from logic
controller. Logic low causes transceiver to transmit data onto the bus. Logic
high causes the transceiver to receive data from the bus.
USB Differential Data Line – (Input/Output)
USB Differential Data Line + (Input/Output)
Termination Supply (Output): 3.3V speed termination resistor supply output.
USB Supply Voltage (Input): Transceiver supply.
M9999-031805
2
March 2005