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November 2012

FSA801 • Rev.1.0.3

FSA801 — USB2.0 High-Speed (480Mbps), UART, and Audio Switch with Negative Signal Capability

FSA801 — USB2.0 High-Speed (480 Mbps), UART, and

Audio Switch with Negative Signal Capability

Features

 3:1 Switch Handles:

- Audio Headsets

- UART

- Up to Two High- and Low-Speed USB Data

 USB Charger Detection and Indication, Compliant

with USB Battery Charging Specification, Rev 1.1

- Supports Data Contact Detect (DCD)

 Negative-Swing-Capable Audio Channel

 Built-in Termination Resistors for Audio Pop

Reduction

 Simple Switch Control Using Three Select Pins

 28 V Over-Voltage Tolerance on V

BUS

Applications

 Cell Phones, MP3 Players, PDAs

Description

The FSA801 is a 3:1 USB accessory switch that enables

USB data, stereo and mono audio, microphone, and

UART data to share a common connector port. Two

ports are designed for high-speed USB 2.0 signaling,

while also capable of full-speed USB and UART

communication. The architecture allows audio signals to

swing below ground so a common USB and headphone

jack can be used for personal media players and

portable peripheral devices.

FSA801 detects wall chargers through a dedicated pin

that provides the baseband with charger detection. The

charger function is compliant with USB Battery Charging

Specification, Rev 1.1, implementing Data Contact Detect

(DCD) before detecting a charger. The FSA801 indicates

if a Dedicated Charging Port (DCP) or a Charging

Downstream Port (CDP) has been connected.

The FSA801 meets both USB Rev. 2.0 and micro-USB

specifications.

Ordering Information

Part Number

Operating

Temperature Range

Top Mark Package

FSA801UMX -40 to +85°C KL

16-Lead Quad, 1.8 x 2.6 mm Ultrathin Molded

Leadless Package (UMLP)

Figure 1. Typical Application

Summary of content (12 pages)

PAGE 1
FSA801 — USB2.0 High-Speed (480 Mbps), UART, and Audio Switch with Negative Signal Capability Features Description  The FSA801 is a 3:1 USB accessory switch that enables USB data, stereo and mono audio, microphone, and UART data to share a common connector port. Two ports are designed for high-speed USB 2.0 signaling, while also capable of full-speed USB and UART communication.
PAGE 2
Additionally, if all switches are open and VBUS is present, the FSA801 does not close any switch path until the DCD circuitry detects contact with the D+/D- pins and the charger detection is complete. If the D+/D- pins never contact, but VBUS is present, the USB switches cannot be closed when configuring from SEL[2:0]=’000’ to SEL[2:0]=’001’ or SEL[2:0]=’010’. To override this blocking, first switch to a non-USB mode (one of the audio modes, SEL[2:0]=’011’,’100’ or ‘101’), and then to the desired USB mode.
PAGE 3
The FSA801 has three select pins to control the switching operations, SEL[0], SEL[1], and SEL[2] described in Table 1. Table 1.
PAGE 4
Figure 2. 16-Pin, UMLP Pin Assignments (Top-Through View) Pin Descriptions Name Pin # Description USB, UART Interface DP_HOST1 1 D+ signal, dedicated USB port to be connected to the resident USB or UART transceiver on the phone. DM_HOST1 2 D- signal, dedicated USB port to be connected to the resident USB or UART transceiver on the phone. 3 D+ signal, dedicated USB port to be connected to the resident USB or UART transceiver on the phone.
PAGE 5
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Symbol Parameter Min. Max. Unit VCC Supply Voltage from Battery / Baseband -0.5 6.
PAGE 6
All typical values are at 25°C unless otherwise specified. Symbol Parameter VCC (V) Conditions TA = -40 to +85°C Min. Typ. Max. Unit Host Interface Pins (SEL[2:0]) VIH Input High Voltage 3.2 to 4.4 VIL Input Low Voltage 3.2 to 4.4 IIN Control Input Leakage IOZ Off State Leakage 0 to 4.4 4.4 V 1.3 0.7 V VSW =0 to VCC -1 1 µA 0 ≤ DP_CON, DM_CON, DP_HOSTn, DM_HOSTn, R_HOST, L_HOST ≤ 3.6 V -2 2 µA 0.4 V Charger Detect Pin (CD_N) VOL Output Low Voltage 3.2 to 4.
PAGE 7
All typical value are for VCC =3.8 V at 25°C unless otherwise specified. Symbol VCC (V) Parameter Audio Mode 3.8 Active Channel Crosstalk Xtalk DP_CON to DM_CON Active Channel Crosstalk MIC OIRR Off Isolation Rejection Ratio USB Mode THD+N TA = -40 to +85°C Min. Typ. f=20 kHz, RT=32 Ω, CL=0 pF -95 f=1 MHz, RT=50 Ω, CL=0 pF -78 f=240 MHz, RT=50 Ω, CL=0 pF -36 Max. 3.8 Unit Figure dB Figure 9 dB Figure 8 MIC on VBUS to R_HOST, L_HOST 3.
PAGE 8
Figure 3. High-Speed Test Results (DP_CON/DM_CON – DP_HOST1/DM_HOST1) Figure 4. High-Speed Test Results (DP_CON/DM_CON – DP_HOST2/DM_HOST2) Figure 5. High-Speed Eye Compliance Input Signal © 2010 Fairchild Semiconductor Corporation FSA801 • Rev. 1.0.3 www.fairchildsemi.com 8 FSA801 — USB2.
PAGE 9
VON I A(OFF) NC nBn A nA V IN V IN GND V Sel = RON = VON / ION Select I ON Select GND VSel = 0 or Vcc GND 0 orVcc **Each switch port is tested separately. Figure 6. On Resistance Figure 7. Off Leakage Network Analyzer NC RS Network Analyzer RS GND GND GND RS and RT are functions of the application environment (see AC tables for values). CROSSTALK = 20 Log (VOU VCC B Input – VSEL mA CL nSn RT GND Figure 9. Active Channel Crosstalk Generator GND VOUT GND GND Figure 8.
PAGE 10
nBn Capacitance Meter f = 1MHz Capacitance Meter nSn VSel = 0 or Vcc nBn nSn V Sel = f = 1MHz 0 orV cc nBn nBn Figure 11. Channel Off Capacitance Figure 12. Channel On Capacitance Audio Analyzer RS GND V IN VS GND V CNTRL GND VSel = GND 0 or Vcc RS and RT are functions of the application environment (see AC Tables for specific values). V OUT RT GND Figure 13. Total Harmonic Distortion + Noise © 2010 Fairchild Semiconductor Corporation FSA801 • Rev. 1.0.3 www.fairchildsemi.
PAGE 11
1.80 0.10 C A 2.10 B 0.563 (15X) 0.663 2X 1 2.60 2.90 PIN#1 IDENT 0.40 0.10 C TOP VIEW 0.10 C 0.55 MAX. 0.08 C 0.225 (16X) 2X RECOMMENDED LAND PATTERN 0.152 TERMINAL SHAPE VARIANTS SEATING C PLANE 0.05 0.00 0.40 0.60 SIDE VIEW 0.15 0.25 0.45 0.35 15X 0.10 0.10 PIN 1 5 0.30 15X 0.50 0.15 0.25 NON-PIN 1 Supplier 1 9 0.40 0.30 0.50 0.15 0.25 1 0.15 15X 0.25 PIN 1 PIN#1 IDENT 16 0.55 0.45 BOTTOM VIEW NON-PIN 1 0.3015X 0.50 Supplier 2 13 0.25 0.15 0.10 C A B 0.
PAGE 12
FSA801 — USB2.0 High-Speed (480Mbps), UART, and Audio Switch with Negative Signal Capability 12 www.fairchildsemi.com © 2010 Fairchild Semiconductor Corporation FSA801 • Rev. 1.0.