MIC2551A MICREL [Micrel Semiconductor], MIC2551A Datasheet - Page 2

• Manufacturer Part Number: MIC2551A
• Description: USB TRANSCEIVER
• Manufacturer: MICREL [Micrel Semiconductor]

MIC2551A
Pin Configuration
Pin Description
* See Table 1 for description of logic states.
M9999-051004
MIC2551ABTS MIC2551ABML
Pin Number
10/11
12
13
14
1
2
3
4
5
6
7
8
9
CON
GND
RCV
SPD
VIF
VM
VP
Pin Number
1
2
3
4
5
6
7
10/11
8,16
15
12
13
14
1
2
3
4
5
6
7
9
14-Pin TSSOP
Pin Name
D–, D+*
VTRM
VBUS
RCV*
OE#*
CON
GND
SPD
SUS
VPU
VM*
VP*
14 VBUS
13
12
11
10
VIF
NC
9
8
VPU
VTRM
D+
D-
OE#
SUS
I/O
I/O
I/O
I/O
O
O
O
I
I
I
I
I
I
Pin Function
System Interface Supply Voltage: Used to provide reference
supply voltage for system I/O interface signaling.
Edge Rate Control: A logic HIGH operates at edge rates for “full
speed” operation. A logic LOW operates edge rates for “low
speed” operation.
Receive Data: Output for USB differential data.
If OE# = 1, VP = Receiver output (+)
If OE# = 0, VP = Driver input (+)
If OE# = 1 VM, = Receiver output (-)
If OE# = 0, VM = Driver input (-)
CONNECT (Input): Controls state of VPU. Refer to VPU pin
description for detail.
Ground Reference.
Suspend: Active-High. Turns off internal circuits to reduce supply
current.
Output Enable: Active-Low. Enables the transceiver to transmit
data onto the bus. When inactive, the transceiver is in the receive
mode.
Differential data lines conforming to the USB standard.
3.3V Reference Supply Output: Requires a minimum 0.1 F
decoupling capacitor for stability. A 1 F capacitor is recom-
mended
Pull-up Supply Voltage Output: Used to connect 1.5k
speed detect resistor. If CON = 1, VPU is high impedance.
If CON = 0, VPU = 3.3V.
USB Bus Supply Voltage: Used to power USB transceiver and
internal circuitry.
No connect.
2
RCV
SPD
VM
VP
16-Pin MLF™ (ML)
1
2
3
4
16 15 14 13
5 6 7 8
12
10
11
9
VTRM
D+
D—
OE#
pull-up
May 2004
Micrel