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| 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 PI7AT04 SOTINYTM Low Voltage, Zero-Delay, Active Transmission Line Clamp Features 5V and 3.3V Line Clamping Near Zero Quiescent Supply Current: 10A Maximum - Active circuit clamping Low Capacitance: 5pF (typ.) High 4kV ESD Protection Packaging (Pb-free & Green Available): - 6-pin SC70 (C) Description The PI7AT04 actively clamps overshoot and undershoot voltages on transmission lines and backplanes. Improperly terminated data lines have reflections that can result in lost data or unreliable system behavior. The PI7AT04 clamps undershoot and overshoot voltages for up to four lines. For other options and packages contact Pericom Marketing. Compared to Schottky diodes, the PI7AT04 uses less power and requires no additional drive power. By avoiding a passive termination/clamp technology, PI7AT04 power consumption is very low at 5V. The PI7AT04 is ideal in applications where characteristic impedance varies with system configuration. Changing characteristic impedance is common when memory or function cards are added or removed on a bus. The PI7AT04 does not replace parallel terminator resistors. Benefits Reduced EMI - Limits high-frequency ring voltage Minimum Power Consumption Higher Noise Margin Minimal Line Loading Applications CPU Termination Backplane Termination Termination Product Pin Configuration Product Pin Description Pin Numbe r 6-pin, SC70 Name T0 T1 T2 T3 GND VDD De s cription Line Termination Line Termination Line Termination Line Termination Ground Positive Supply Voltage T0 1 T1 2 GND 3 6-Pin C 6 5 4 VDD T3 T2 1 2 4 5 3 6 Functional Block Diagram VDD 0 Control Input 3 1 PS8588C 08/02/04 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 PI7AT04 SOTINYTM Low Voltage, Zero-Delay, Active Transmission Line Clamp Absolute Maximum Ratings DC Voltage on Any Pin Storage Temperature Lead Temperature (Soldering, 10 seconds) The rmal Information MSOP Continuous Power Dissipation: derate 8.7mW/C above 70C) SC70/SOT23 Continuous Power Dissipation: derate 7.0mW/C above 70C) 650mW 550mW 6.5V -65C to 150C 300C Electrical Characteristics VDD = 5V Over Operating Temperature Range, unless otherwise noted. Parame te r Line Signal Voltage Above VDD Line Signal Voltage Below GND Input Line Capacitance Input High Current Input Low Current Supply Voltage Range Quiescent Supply Current ESD Protection Symbol Note 2 Note 2 CI IIH IIL VDD IDD Conditions Te mp M in. Typ 0.6 -0.6 M ax. Units V pF Line Voltage = VDD VLINE = VDD, VDD = 5.5V VLINE = 0V, VDD = 5.5V 25 5 5 5 4.5 5.5 20 4 A V A kV All lines floating MIL- STD- 883, Method 3015 VDD = 3.3V Over Operating Temperature Range, unless otherwise noted. Parame te r Line Signal Voltage Above VDD Line Signal Voltage Below GND Input Line Capacitance Input High Current Input Low Current Supply Voltage Range Quiescent Supply Current ESD Protection Symbol Note 2 Note 2 CI IIH IIL VDD IDD Conditions Te mp M in. Typ. 0.6 -0.6 M ax. Units V pF Line Voltage = VDD VLINE = VDD, VDD = 3.6V VLINE = 0V, VDD = 3.6V 25 5 3 3 3.0 3.6 20 4 A V A kV All lines floating MIL- STD- 883, Method 3015 Notes: 1. Capacitance and ESD parameters are guaranteed by design. 2. Maximum line voltage clamped during a transient. 2 PS8588C 08/02/04 PI7AT04 SOTINYTM Low Voltage, Zero-Delay, 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 Active Transmission Line Clamp Application Information Driver 74VCX16244 Transmission Line Receiver 74VCX16244 VDD PI7AT04 Figure 1. Test Diagram 6.5V 3.5V 10ns/div. Figure 2. VCX16244 (Vcc = 3.6V) output after driving 3-inch transmission line. Signal capture at end of line 6.5V VCC = 3.6V VCC = NC 3.5V 10ns/div. Figure 3. VCX16244 (Vcc = 3.6V) output after driving 3-inch transmission line and driving PI7AT04 input. Signal as seen at the input pin. Signal capture when Vcc in NC, Vcc = 3.6V. 3 PS8588C 08/02/04 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 PI7AT04 SOTINYTM Low Voltage, Zero-Delay, Active Transmission Line Clamp Packaging Mechanical: 6-Pin SC70 (C) 6 5 4 1 2 3 Notes: 1) Controlling dimensions in millimeters 2) Ref: JEDEC MO-203AB Ordering Information Ordering Code PI7AT04CX PI7AT04CEX Line Terminations 4 4 Package Code C C Package Description 6-pin SC70 6-pin SC70 Top Marking Z9 Z9 Notes: 1. Thermal Characteristics can be found on the world wide web at www.pericom.com/packaging/ 2. X = Tape and reel Pericom Semiconductor Corporation * 1-800-435-2336 * www.pericom.com 4 PS8588C 08/02/04 |
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