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Download FSA1208 Low-Power, Eight-Port, High-Speed Isolation Switch FSA1208 — Low-Power, Eight-Port, Features
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FSA1208 Low-Power, Eight-Port, High-Speed Isolation Switch Features Description Low On Capacitance: 6pF Typical The FSA1208 is a low-power, eight-port, high-speed switch. This part is configured as a single-pole, singlethrow switch and is optimized for isolating a high-speed source, such as a DDR memory bus. The FSA1208 features an extremely low on capacitance (CON) of 6pF. Superior channel-to-channel crosstalk minimizes interference. Wide -3db Bandwidth: > 400MHz 8kV ESD Rating; >16kV Power/GND ESD Rating Low On Resistance: 15Ω Typical Low Power Consumption: 1μA Maximum 10μA Maximum ICCT over an Expanded Voltage Range (VIN=2.3V, VCC=4.3V) The FSA1208 contains special circuitry on the A & B pins that allows the device to withstand an over-voltage condition. This device is also designed to minimize current consumption even when the control voltage applied to the /OE pin is lower than the supply voltage (VCC). Applications include port isolation and switching in DDR memory modules, portable cell phones, PDAs, digital cameras, printers, and notebook computers. Packaged in Space-Saving 20-Lead MLP (2.5 x 4.5mm) Low COFF Capacitance: 2.5pF Typical Applications DIMM DDR Memory IMPORTANT NOTE: For additional performance information, please contact [email protected]. Ordering Information Part Number Top Mark Operating Temperature Range FSA1208BQX F1208 -40 to +85°C Package Eco Status 20-Lead, Quad, Molded Leadless Package (MLP), 2.5 x 4.5mm Green For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html. DIMM 1A 2A 3A 4A 5A 6A 7A 8A FSA1208 OE VCC 1B 2B 3B 4B 5B 6B 7B 8B DIMM DIMM Slot Figure 1. Analog Symbol © 2008 Fairchild Semiconductor Corporation FSA1208 Rev. 1.0.1 www.fairchildsemi.com FSA1208 — Low-Power, Eight-Port, High-Speed Isolation Switch November 2009 19 18 17 16 15 14 13 B1 12 B2 B3 B4 B5 B6 B7 B8 20 11 /OE NC 1 10 VCC GND 2 3 4 5 6 7 8 A1 9 A2 A3 A4 A5 A6 Figure 2. Pin Assignments for MLP (Top Through View) Pin Definitions Pin # Name Description 20 /OE Switch Enable 2-9 1A-8A A Side of Bus 12-19 1B-8B B Side of Bus 11 NC No Connection 1 VCC Power 10 GND Ground A7 A8 FSA1208 — Low-Power, Eight-Port, High-Speed Isolation Switch Pin Configurations Truth Table /OE Func tion HIGH Disconnect LOW 1A-8A=1B-8B © 2008 Fairchild Semiconductor Corporation FSA1208 Rev. 1.0.1 www.fairchildsemi.com 2 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 P VCC arameter Supply Voltage (1) VCNTRL DC Input Voltage (/OE) VSW DC Switch I/O Voltage IIK DC Input Diode Current IOUT DC Output Current TSTG Storage Temperature (1) Min. Max. Unit -0.50 +5.25 V -0.50 VCC V -0.50 5.25 V -50 -65 All Pins 50 mA +150 °C 7.5 Human Body Model, JEDEC: JESD22-A114 I/O to GND ESD mA 8 Power to GND kV 16 Charged Device Model, JEDEC: JESD22-C101 2 Note: 1. The input and output negative ratings may be exceeded if the input and output diode current ratings are observed. Recommended Operating Conditions FSA1208 — Low-Power, Eight-Port, High-Speed Isolation Switch Absolute Maximum Ratings The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings. Symbol P VCC VCNTRL VSW TA arameter Min. Max. Unit 2.3 4.3 V 0 VCC V Switch I/O Voltage -0.5 VCC V Operating Temperature -40 +85 °C Supply Voltage (2) Control Input Voltage (S, /OE) Note: 2. The control input must be held HIGH or LOW; it must not float. © 2008 Fairchild Semiconductor Corporation FSA1208 Rev. 1.0.1 www.fairchildsemi.com 3 All typical values are at 25°C unless otherwise specified. Symbol P arameter Conditions TA=- 40ºC to +85ºC Min. T yp. VIH Input Voltage High VIL Input Voltage Low IIN Control Input Leakage VSW =0 to VCC 4.3 IOZ Off State Leakage 0 ≤ A, B ≤ 3.6V 4.3 VSW =0V, ION=-10mA Figure 3 2.5 7 Ω VSW =1.8V, ION=-10mA Figure 3 2.5 15 Ω (3) -1.2 Units Clamp Diode Voltage Switch On Resistance 2.5 Max. VIK RON IIN=-18mA VCC (V) V 2.3 to 3.6 1.3 V 4.3 1.7 V 2.3 to 3.6 0.5 V 4.3 0.7 V -1 1 µA -2 2 µA ICC Quiescent Supply Current VIN=0 or VCC, IOUT=0 4.3 1 µA ICCT Increase in ICC Current Per Control Voltage and VCC VIN=1.8V 2.7 10 µA Notes: 3. Measured by the voltage drop between A and B pins at the indicated current through the switch. On resistance is determined by the lower of the voltage on the two (A or B ports). 4. Guaranteed by characterization. AC Electrical Characteristics FSA1208 — Low-Power, Eight-Port, High-Speed Isolation Switch DC Electrical Characteristics All typical values are for VCC=2.5V at 25°C unless otherwise specified. Symbol P arameter Conditions VCC (V) TA=- 40ºC to +85ºC Min. T yp. Max. Units tON Turn-On Time, /OE to Output RL=50Ω, CL=5pF VSW =1.8V Figure 4, Figure 5 2.3 to 3.6 15 34 ns tOFF Turn-Off Time, /OE to Output RL=50Ω, CL=5pF VSW =1.8V Figure 4, Figure 5 2.3 to 3.6 12 25 ns tPD Propagation Delay RL=50Ω, CL=5pF Figure 4, Figure 6 3.3 0.35 ns OIRR Off Isolation RL=50Ω, f=400MHz Figure 11 2.3 to 3.6 -40 dB Xtalk Non-Adjacent Channel Crosstalk RL=50Ω, f=100MHz Figure 12 2.3 to 3.6 -40 dB 1000 MHz 750 MHz BW (5) -3db Bandwidth RL=50Ω, CL=0pF Figure 10 RL=50Ω, CL=5pF Figure 10 2.3 to 3.6 Note: 5. Guaranteed by characterization. © 2008 Fairchild Semiconductor Corporation FSA1208 Rev. 1.0.1 www.fairchildsemi.com 4 Symbol P arameter Conditions (6) VCC (V) TA=- 40ºC to +85ºC Min. T yp. Max. Units tSK(O) Channel-to-Channel Skew CL=5pF 3.3 40 80 ps tSK(P) Skew of Opposite Transitions (6) of the Same Output CL=5pF 3.3 15 40 ps CL=5pF 3.3 60 100 ps tSK(PKG) (6) Package-to-Package Skew Note: 6. Guaranteed by characterization. Capacitance Symbol P arameter Conditions TA=- 40ºC to +85ºC Min. T yp. CIN Control Pin Input Capacitance VCC=0.2V, f=1MHz 2.0 CON D+/D- On Capacitance VCC=2.5V, /OE=0V, f=1MHz Figure 9 6.0 COFF D1n, D2n Off Capacitance VCC and /OE=2.5V, f=1MHz Figure 8 2.5 © 2008 Fairchild Semiconductor Corporation FSA1208 Rev. 1.0.1 Max. Units pF FSA1208 — Low-Power, Eight-Port, High-Speed Isolation Switch High-Speed-Related AC Electrical Characteristics www.fairchildsemi.com 5 VON An Bn VSW GND ION /OE R ON = VON / ION GND V Sel = 0 orVcc Figure 3. On Resistance An tRISE = 2.5ns Bn VSW GND CL RS RL tFALL = 2.5ns VCC V OUT Input – V/OE , VSel GND 10% GND V Sel 90% 90% Output- VOUT RL , RS , and C L are functions of the application environment (see AC tables for specific values). CL includes test fixture and stray capacitance. VOL Figure 4. AC Test Circuit Load VCC /2 VCC /2 VOH GND 90% tON 90% tOFF Figure 5. Turn-On / Turn-Off Waveforms tFALL = 500ps tRISE = 500ps +400mV 90% 0V 400mV 50% Input 0V 50% - 400mV tPLH 10% 90% 10% tPHL VOH Output 10% FSA1208 — Low-Power, Eight-Port, High-Speed Isolation Switch Test Diagrams 50% Output 50% VOL t PHL Figure 6. Propagation Delay (tR tF – 500ps) Figure 7. Intra-Pair Skew Test tSK(P) An Capacitance Meter /OE Capacitance Meter An /OE VSel = 0 or Vcc V Sel = 0 or Vcc Bn Bn Figure 8. Channel Off Capacitance © 2008 Fairchild Semiconductor Corporation FSA1208 Rev. 1.0.1 t PLH Figure 9. Channel On Capacitance www.fairchildsemi.com 6 Network Analyzer RS V IN GND VS GND VSel GND VOUT GND RT GND RS and RT are functions of the application environment (see AC Tables for specific values). Figure 10. Bandwidth Network Analyzer RS VSel V IN GND RT VS GND GND V OUT GND GND RT RS and RT are functions of the application environment (see AC tables for specific values). GND FSA1208 — Low-Power, Eight-Port, High-Speed Isolation Switch Test Diagrams (Continued) Off isolation = 20 Log (VOUT/ VIN) Figure 11. Channel Off Isolation Network Analyzer NC RS GND V IN VS VSel GND GND RT GND GND RS and RT are functions of the application environment (see AC tables for specific values). RT V OUT GND Crosstalk= 20 Log (VOUT / VIN) Figure 12. Non-Adjacent Channel-to-Channel Crosstalk © 2008 Fairchild Semiconductor Corporation FSA1208 Rev. 1.0.1 www.fairchildsemi.com 7 FSA1208 — Low-Power, Eight-Port, High-Speed Isolation Switch Physical Dimensions Figure 13. 20-Lead, Molded Leadless Package (MLP) Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2008 Fairchild Semiconductor Corporation FSA1208 Rev. 1.0.1 www.fairchildsemi.com 8 FSA1208 — Low-Power, Eight-Port, High-Speed Isolation Switch © 2008 Fairchild Semiconductor Corporation FSA1208 Rev. 1.0.1 www.fairchildsemi.com 9