INTEGRATED CIRCUITS CBT6810 10-bit bus switch with precharged outputs and Schottky undershoot protection for live insertion Product specification 1999 Apr 05 Philips Semiconductors Product specification 10-bit bus switch with precharged outputs and Schottky undershoot protection for live insertion FEATURES CBT6810 DESCRIPTION • 5Ω switch connection between port A and port B • TTL compatible input and output levels • Undershoot protection included to prevent shoot through level The CBT6810 provides ten bits of high-speed TTL-compatible bus switching. The low on-state resistance of the switch allows bi-directional connections to be made while adding near-zero propagation delay. The device also precharges the B port to a user-selectable bias voltage (BIASV) to minimize live-insertion noise. changes • Bias voltage pre-charges the outputs to minimize signal distortion The CBT6810 is organized as one 10-bit switch with a single enable (OE) input. When OE is low, the switch is on and port A is connected to port B. When OE is high, the switch between port A and port B is open and the B port is precharged to BIASV through the equivalent of a 10-kΩ resistor. during live insertion The CBT6810 is characterized for operation from 0°C to 85°C. QUICK REFERENCE DATA SYMBOL CONDITIONS Tamb = 25°C; GND = 0V PARAMETER TYPICAL UNIT tPLH tPHL Propagation delay An to Bn or Bn to An CL = 50pF; VCC = 5V 250 ps CIN Input capacitance VI = 0V or VCC 3.5 pF CIO Input/output capacitance Outputs disabled; VO = 0V or VCC 9.0 pF ORDERING INFORMATION PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA DWG NUMBER –40°C to +85°C CBT6810 PW CBT6810PW DH SOT355–1 24-Pin Plastic TSSOP Type I PIN CONFIGURATION OE PIN DESCRIPTION 1 24 Vcc A1 2 23 B1 A2 3 22 B2 A3 4 21 B3 A4 5 20 B4 A5 6 19 B5 A6 7 18 B6 A7 8 17 B7 A8 9 16 B8 A9 10 15 B9 A10 11 14 B10 GND 12 13 BIASV PIN NUMBER SYMBOL NAME AND FUNCTION 1 OE Output enable 13 BIASV Bias supply pin 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 A1–A10 A - port side 23, 22, 21, 20, 19, 18, 17, 16, 15, 14 B1–B10 B - port side with active pullup 12 GND Ground (V) 24 VCC Positive supply voltage SA00505 1999 Apr 05 2 853–2151 21177 Philips Semiconductors Product specification 10-bit bus switch with precharged outputs and Schottky undershoot protection for live insertion LOGIC SYMBOL CBT6810 FUNCTION TABLE BIASV B1 A1 OE STATE L A port = B port H A port = Z H B port = BIASV H = High voltage level L = Low voltage level Z = High impedance “off ” state B10 A10 CE SA00531 ABSOLUTE MAXIMUM RATINGS1, 2 SYMBOL VCC PARAMETER CONDITIONS DC supply voltage IIK DC clamp diode current VI DC input voltage3 RATING UNIT –0.5 to +7.0 V –50 mA –0.5 to +7.0 V ± 128 mA ISW DC continuous channel current Tstg Storage temperature range –65 to 150 °C DC Bias voltage range –0.5 to 7.0 V 134 °C/W BIASV øJA Power dissipation per package Plastic thin shrink small outline package NOTES: 1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 2. The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150°C. 3. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 1999 Apr 05 3 Philips Semiconductors Product specification 10-bit bus switch with precharged outputs and Schottky undershoot protection for live insertion CBT6810 RECOMMENDED OPERATING CONDITIONS LIMITS SYMBOL PARAMETER UNIT Min Max VCC DC supply voltage 4.0 5.5 V BIASV DC supply voltage 1.3 VCC V VIH High-level input voltage (control pin) 2.0 VIL Low-level Input voltage (control pin) Tamb Operating free-air temperature range V –40 0.8 V +85 °C DC ELECTRICAL CHARACTERISTICS LIMITS SYMBOL PARAMETER TEST CONDITIONS Tamb = –40°C to +85°C Min VIK Typ1 UNIT Max Input clamp voltage VCC = 4.5V; II = –18mA –1.2 V II Input leakage current (control pin) VCC = 5.5V; VI = GND or 5.5V ±5 µA IO Output bias current (B pins) VCC = 4.5V; BiasV = 2.4V; VO = 0, OE = VCC –0.25 mA ICC Quiescent supply current VCC = 5.5V; IO = 0, VI = VCC or GND 2.5 mA ∆ICC Control pins2 VCC = 5.5V, one input at 3.4V, other inputs at VCC or GND 2.5 mA CI Control pins VI= 3V or 0 3.5 pF Terminal capacitance VO = 3V or 0; switch off 9.0 pF CO(OFF) VCC = 4.5V; VI = 0V; II = 64mA 5 7 VCC = 4.5V; VI = 0V; II = 30mA 5 7 ron3 On-resistance VP Pass voltage VIN = VCC = 5.0V; Iout = –100µA Undershoot static current protection VCC = 5.0V, BiasV = VCC IB = –5µA, VB ≥ 3V VCC = 4.5V; VI = 2.4V; II = –15mA IUSP4 3.4 10 15 3.6 3.9 –10 NOTES: 1. All typical values are at VCC = 5V, TA = 25 C 2. This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND 3. Measured by the voltage drop between the A and the B terminals at the indicated current through the switch. On–state resistance is determined by the lowest voltage of the two (A or B) terminals. 4. Force IUSP, measure VB ≥ 3V 1999 Apr 05 4 Ω V mA Philips Semiconductors Product specification 10-bit bus switch with precharged outputs and Schottky undershoot protection for live insertion CBT6810 AC CHARACTERISTICS FOR VCC = 5.0V ±0.5V RANGE GND = 0V; tr = tf ≤ 2.5ns; CL = 50pF. SYMBOL PARAMETER Propagation delay An to Bn; Bn to An2 tpd 3-State output enable time OE to An; OE to Bn; BIASV = GND 3-State output enable time OE to An; OE to Bn; BIASV = 3.0V 3-State output enable time OE to An; OE to Bn; BIASV = GND 3-State output enable time OE to An; OE to Bn; BIASV = 3.0V tPZH tPZL tPHZ tPLZ 1 LIMITS Tamb = –40 to +85°C MIN TYP1 MAX 0.25 2 1.8 3.5 5.3 ns 2 2.1 4.2 7.2 ns 2 1.7 3.7 6.1 ns 2 1.0 5.5 7.3 ns WAVEFORM UNIT ns NOTE: 1. All typical values are measured at Tamb = 25°C and VCC = 5.0V 2. Warranted but not production tested. The propagation delay is based on the RC time constant of the typical ON-state resistance of the switch and a load capacitance of 50pF, when driven by an ideal voltage source (zero output impedance) AC WAVEFORMS TEST CIRCUIT AND WAVEFORMS VM = 1.5V, VIN = GND to 3.0V 7V 3V 1.5V 1.5V S1 Open GND INPUT 500 Ω CL = 50 pF 0V tPLH 500 Ω From Output Under Test tPHL Load Circuit VOH 1.5V 1.5V OUTPUT VOL SA00028 Waveform 1. Waveforms Showing the Input (An) to Output (Yn) Propagation Delays 1.5 V 3.5V Output Waveform 1 S1 at 7 V (see Note) 1.5 V Output Waveform 2 S1 at Open (see Note) VOL + 0.3V VOL tPHZ tPZH VOH VOH – 0.3V 1.5 V 0V Note: Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. SA00029 Waveform 2. Waveforms Showing the 3-State Output Enable and Disable Times 1999 Apr 05 tPLZ/tPZL 7V tPHZ/tPZH open SA00012 0V tPLZ open NOTES: 1. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns. 2. The outputs are measured one at a time with one transition per measurement. 1.5 V tPZL S1 tpd DEFINITIONS Load capacitance includes jig and probe capacitance; CL = see AC CHARACTERISTICS for value. 3V Output Control (Low-level enabling TEST 5 Philips Semiconductors Product specification 10-bit bus switch with precharged outputs and Schottky undershoot protection for live insertion TSSOP24: plastic thin shrink small outline package; 24 leads; body width 4.4 mm 1999 Apr 05 6 CBT6810 SOT355-1 Philips Semiconductors Product specification 10-bit bus switch with precharged outputs and Schottky undershoot protection for live insertion NOTES 1999 Apr 05 7 CBT6810 Philips Semiconductors Product specification 10-bit bus switch with precharged outputs and Schottky undershoot protection for live insertion CBT6810 DEFINITIONS Data Sheet Identification Product Status Definition Objective Specification Formative or in Design This data sheet contains the design target or goal specifications for product development. Specifications may change in any manner without notice. Preliminary Specification Preproduction Product This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. Product Specification Full Production This data sheet contains Final Specifications. Philips Semiconductors reserves the right to make changes at any time without notice, in order to improve design and supply the best possible product. Philips Semiconductors and Philips Electronics North America Corporation reserve the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. LIFE SUPPORT APPLICATIONS Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices, or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088–3409 Telephone 800-234-7381 Philips Semiconductors and Philips Electronics North America Corporation register eligible circuits under the Semiconductor Chip Protection Act. Copyright Philips Electronics North America Corporation 1998 All rights reserved. Printed in U.S.A.