Revised October 2000 74F1071 18-Bit Undershoot/Overshoot Clamp and ESD Protection Device General Description Features The 74F1071 is an 18-bit undershoot/overshoot clamp which is designed to limit bus voltages and also to protect more sensitive devices from electrical overstress due to electrostatic discharge (ESD). The inputs of the device aggressively clamp voltage excursions nominally at 0.5V below and 7V above ground. ■ 18-bit array structure in 20-pin package ■ FAST Bipolar voltage clamping action ■ Dual center pin grounds for min inductance ■ Robust design for ESD protection ■ Low input capacitance ■ Optimum voltage clamping for 5V CMOS/TTL applications Ordering Code: Order Number 74F1071SC Package Number M20B Package Description 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 74F1071MSA MSA20 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide 74F1071MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Note: Simplified Component Representation FAST is a registered trademark of Fairchild Semiconductor Corporation. © 2000 Fairchild Semiconductor Corporation DS011685 www.fairchildsemi.com 74F1071 18-Bit Undershoot/Overshoot Clamp October 1994 74F1071 Absolute Maximum Ratings(Note 1) Recommended Operating Conditions Storage Temperature −65°C to +150 °C Ambient Temperature under Bias −65°C to +125 °C Free Air Ambient Temperature Junction Temperature under Bias −65°C to +150 °C Reverse Bias Voltage Input Voltage (Note 2) −0.5V to +6V Input Current (Note 2) −200 mA to +50 mA 0°C to +70°C 0V to 5.25 VDC Thermal Resistance (θJA in Free Air) ESD (Note 3) SOIC Package 100°C/W SSOP Package 110°C/W Human Body Model ±10 kV (MIL-STD-883D method 3015.7) IEC 801-2 ±6 kV Machine Model (EIAJIC-121-1981) ±2 kV Note 1: Absolute maximum ratings are DC values beyond which the device may be damaged or have its useful life impaired. Functional operation under these conditions is not implied. DC Latchup Source Current Note 2: Voltage ratings may be exceeded if current ratings and junction temperature and power consumption ratings are not exceeded. ±500 mA (JEDEC Method 17) Note 3: ESD Rating for Direct contact discharge using ESD Simulation Tester. Higher rating may be realized in the actual application. Package Power Dissipation @+70°C SOIC Package 800 mW DC Electrical Characteristics Symbol Parameter IIH Input HIGH Current VZ Reverse Voltage VF Forward Voltage TA = +25°C Min 6.6 Max 1.5 10 3 20 6.9 7.2 7.1 7.5 Min Max 50 100 5.9 7.7 8.0 −0.3 −0.6 −0.9 −0.3 −0.9 −0.5 −1.1 −1.5 −0.5 −1.5 ICT Adjacent Input Crosstalk CIN Input Capacitance 25 (small signal @ 1 MHz) 13 www.fairchildsemi.com TA = 0°C to +70°C Typ 3 Units µA V V Conditions VIN = 5.25V; Untested Input @ GND VIN = 5.5V; Untested Input @ GND IZ = 1 mA; Untested Inputs @ GND IZ = 50 mA; Untested Inputs @ GND IF = −18 mA; Untested Inputs @ 5V IF = −200 mA; Untested Inputs @ 5V % pF 2 VBIAS = 0 VDC VBIAS = 5 VDC 74F1071 DC Electrical Characteristics Typical Forward and Reverse V/I Characteristics Typical Reverse Conduction Characteristics ESD Network Typical Forward Conduction Characteristics CZ RZ Human Body Model 100 pF 1500Ω IEC 801-2 150 pF 330Ω Simulated ESD Voltage Clamping Test Circuit 3 www.fairchildsemi.com 74F1071 DC Electrical Characteristics (Continued) Unclamped + 1 KV ESD Voltage Waveform (IEC801-2 Network) Clamped + 1 KV ESD Voltage Waveform (IEC801-2 Network) Unclamped - 1 KV ESD Voltage Waveform (IEC801-2 Network) Clamped - 1 KV ESD Voltage Waveform (IEC801-2 Network) Typical Application 74F1071 ESD Protection of ASIC on User Port www.fairchildsemi.com 4 74F1071 Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide Package Number M20B 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide Package Number MSA20 5 www.fairchildsemi.com 74F1071 18-Bit Undershoot/Overshoot Clamp Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Package Number MTC20 Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. www.fairchildsemi.com www.fairchildsemi.com 6