NC7WBD3125

NC7WBD3125 2-Bit Low Power Bus Switch with Level Shifting May 2000 Revised December 2005 NC7WBD3125 2-Bit Low Power Bus Switch with Level Shifting General Description The NC7WBD3125 is a 2-bit ultra high-speed CMOS FET bus switch with enhanced level shifting circuitry and with TTL-compatible active LOW control inputs. The low On Resistance of the switch allows inputs to be connected to outputs with minimal propagation delay and without generating additional ground bounce noise. The device is organized as a 2-bit switch with independent bus enable (OE) controls. When OE is LOW, the switch is ON and Port A is connected to Port B. When OE is HIGH, the switch is OPEN and a high-impedance state exists between the two ports. Reduced voltage drive to the gate of the FET switch permits nominal level shifting of 5V to 3V through the switch. Control inputs tolerate voltages up to 5.5V independent of VCC. Features O Space saving US8 surface mount package O MicroPak¥ Pb-Free leadless package O Typical 3: switch resistance at 5.0V VCC, VIN O Level shift facilitates 5V to 3.3V interfacing O Minimal propagation delay through the switch O Power down high impedance input/output O Zero bounce in flow through mode O TTL compatible active LOW control inputs O Control inputs are overvoltage tolerant O Bus switch replacement for x125 logic part 0V Ordering Code: Package Package Code Number Top Mark MAB08A MAC08A WB5D T9 Order Number NC7WBD3125K8X NC7WBD3125L8X (Preliminary) Package Description Supplied As 8-Lead US8, JEDEC MO-187, Variation CA 3.1mm Wide 3k Units on Tape and Reel Pb-Free 8-Lead MicroPak, 1.6 mm Wide 5k Units on Tape and Reel Pb-Free package per JEDEC J-STD-020B. MicroPak¥ is a trademark of Fairchild Semiconductor Corporation. © 2005 Fairchild Semiconductor Corporation DS500374 www.fairchildsemi.com NC7WBD3125 Logic Diagram Connection Diagrams Pin Assignments for US8 Pin Descriptions Pin Name A B OE (Top View) Description Bus A Switch I/O Bus B Switch I/O Bus Enable Input Pin One Orientation Diagram Function Table Bus Enable Input (OE) L H H HIGH Logic Level L LOW Logic Level Function B Connected to A Disconnected AAA represents Product Code Top Mark - see ordering code Note: Orientation of Top Mark determines Pin One location. Read the top product code mark left to right, Pin One is the lower left pin (see diagram). Pad Assignments for MicroPak (Top Through View) www.fairchildsemi.com 2 NC7WBD3125 Absolute Maximum Ratings(Note 1) Supply Voltage (VCC) DC Switch Voltage (VS) DC Output Voltage (VIN) (Note 2) DC Input Diode Current (IIK) VIN  0V DC Output (IOUT) Current DC VCC or Ground Current (ICC/IGND) Storage Temperature Range (TSTG) Junction Temperature under Bias (TJ) Lead Temperature (TL) Power Dissipation (PD) @ 85qC (Soldering, 10 Seconds) 0.5V to 7.0V 0.5V to 7.0V 0.5V to 7.0V 50 mA 128 mA Recommended Operating Conditions (Note 3) Supply Operating (VCC) Control Input Voltage (VIN) Switch Input Voltage (VIN) Switch Output Voltage (VOUT) Operating Temperature (TA) Input Rise and Fall Time (tr, tf) Control Input Thermal Resistance (TJA) Switch I/O 0 ns/V to 5 ns/V 0 ns/V to DC 250qC/W 4.5V to 5.5V 0V to 5.5V 0V to 5.5V 0V to 5.5V 40qC to 85qC r100 mA 65qC to 150qC 150qC 260qC 250 mW Note 1: The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation. Note 2: The input and output negative voltage ratings may be exceeded if the input and output diode current ratings are observed. Note 3: Unused logic inputs must be held HIGH or LOW. They may not float. DC Electrical Characteristics Symbol VIK VIH VIL VOH IIN IOFF RON Parameter Clamp Diode Voltage HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Voltage Input Leakage Current Power OFF Leakage Current Switch On Resistance (Note 4) ICC Quiescent Supply Current VCC (V) 4.5 4.5 to 5.5 4.5 to 5.5 4.5 to 5.5 5.5 5.5 4.5 4.5 4.5 5.5 1.1 1.5 10.0 mA 3.0 3.0 15.0 See Figure 3 2.0 0.8 Min TA 40qC to 85qC Typ Max Units Conditions IIN 1.2 V V V V 18 mA r1.0 r1.0 7.0 7.0 50.0 PA PA : VIN 0 d VIN d 5.5V 0V, IIN 0V, IIN 2.4V, IIN OE 2 OE 2 VCC 0 d A, B d VCC VIN VIN VIN VIN OE1 OE1 VIN 64 mA 30 mA 15 mA 0 VCC or GND, IOUT GND VCC VCC ' ICC PA mA Increase in ICC per Input (Note 5) 5.5 1.0 2.5 3.4V, One OE Input only, Other OE Note 4: 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 voltages on the two (A or B) pins. Note 5: Per TTL driven input (VIN 3.4V, control input only). A and B pins do not contribute to ICC. 3 www.fairchildsemi.com NC7WBD3125 AC Electrical Characteristics TA Symbol Parameter VCC (V) tPHL, tPLH tPZL, tPZH tPLZ, tPHZ Output Disable Time 4.5 to 5.5 0.8 3.0 4.8 ns Propagation Delay Bus-to-Bus (Note 6) Output Enable Time 4.5 to 5.5 1.0 3.5 5.8 ns VI VI VI VI 7V for tPZL 0V for tPZH 7V for tPLZ 0V for tPHZ 4.5 to 5.5 CL Min 40qC to 85qC, RD Typ 50 pF, RU 500: Max 0.25 Units Conditions Figure Number ns VI OPEN Figures 1, 2 Figures 1, 2 Figures 1Figure 2 Note 6: This parameter is guaranteed. The bus switch contributes no propagation delay other than the RC delay of the typical On Resistance of the switch and the 50 pF load capacitance, when driven by an ideal voltage source (zero output impedance). The specified limit is calculated on this basis. Capacitance Symbol CIN CI/O (OFF) CI/O (ON) Parameter Control Pin Input Capacitance Port OFF Capacitance Port ON Capacitance Typ 2.5 6.0 12.0 Max Units pF pF pF VCC VCC VCC 0V 5.0V OE 0V Conditions 5.0V, OE AC Loading and Waveforms Input driven by 50: source terminated in 50: CL includes load and stray capacitance Input PRR 1.0 MHz; tW 500 ns FIGURE 1. AC Test Circuit FIGURE 2. AC Waveforms www.fairchildsemi.com 4 NC7WBD3125 DC Electrical Characteristics FIGURE 3. Typical High Level Output Voltage vs. Supply Voltage 5 www.fairchildsemi.com NC7WBD3125 Tape and Reel Specification TAPE FORMAT for US8 Package Designator K8X Tape Section Leader (Start End) Carrier Trailer (Hub End) Number Cavities 125 (typ) 250 75 (typ) Cavity Status Empty Filled Empty Cover Tape Status Sealed Sealed Sealed TAPE DIMENSIONS inches (millimeters) TAPE FORMAT for MicroPak Package Designator L8X Tape Section Leader (Start End) Carrier Trailer (Hub End) Number Cavities 125 (typ) 250 75 (typ) Cavity Status Empty Filled Empty Cover Tape Status Sealed Sealed Sealed TAPE DIMENSIONS inches (millimeters) www.fairchildsemi.com 6 NC7WBD3125 REEL DIMENSIONS inches (millimeters) Tape Size 8 mm A 7.0 (177.8) B 0.059 (1.50) C 0.512 (13.00) D 0.795 (20.20) N 2.165 (55.00) 0.331  0.059/0.000 (8.40  1.50/0.00) W1 W2 0.567 (14.40) W1  0.078/0.039 (W1  2.00/1.00) W3 7 www.fairchildsemi.com NC7WBD3125 Physical Dimensions inches (millimeters) unless otherwise noted 8-Lead US8, JEDEC MO-187, Variation CA 3.1mm Wide Package Number MAB08A www.fairchildsemi.com 8 NC7WBD3125 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Pb-Free 8-Lead MicroPak, 1.6 mm Wide Package Number MAC08A 9 www.fairchildsemi.com NC7WBD3125 2-Bit Low Power Bus Switch with Level Shifting DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. 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 FAIRCHILD SEMICONDUCTOR CORPORATION As used herein: provided in the labeling, can be reasonably expected to result in significant injury to the user. 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or 2. A critical component is any component of a life support (b) support or sustain life, or (c) whose failure to perform device or system whose failure to perform can be reasonwhen properly used in accordance with instructions for use ably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. PRODUCT STATUS DEFINITIONS Definition of terms Datasheet Identification Product Status Advance Information Preliminary Formative or In Design First Production Definition This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. This datasheet contains preliminary data, and supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains specifications on a product that has been discontinued by Fairchild Semiconductor. The datasheet is printed for reference information only. No Identification Needed Full Production Obsolete Not In Production www.fairchildsemi.com 10