INTEGRATED CIRCUITS CBT3245 Octal bus switch with output enable Preliminary specification 1998 Dec 08 Philips Semiconductors Preliminary specification Octal bus switch with output enable CBT3245 FEATURES DESCRIPTION • Functionally equivalent to QS3245 • Standard ’245-type pinout • 5Ω switch connection between two ports • TTL compatible control input levels • Package options include plastic small outline (D), shrink small The CBT3245 provides eight bits of high-speed TTL-compatible bus switching in a standard ’245 device pinout. The low on-state resistance of the switch allows connections to be made with minimal propagation delay. The CBT3245 device is organized as one 8-bit switch. When enable (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. outline (DB), thin shrink small outline (TSSOP) The CBT3245 is characterized for operation from –40°C to 85°C. QUICK REFERENCE DATA SYMBOL tPLH tPHL CIO(OFF) ICCZ CONDITIONS Tamb = 25°C; GND = 0V PARAMETER Propagation delay An to Yn CL = 50pF; VCC = 5V Pin capacitance (OFF state) VO = 3V or 0V Total supply current Outputs disabled; VCC =5.5V TYPICAL UNIT ns 6 pF µA ORDERING INFORMATION PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA DWG NUMBER 20-Pin plastic SO –40°C to 85°C CBT3245 D CBT3245 D SOT163-1 20-Pin Plastic SSOP Type II –40°C to 85°C CBT3245 DB CBT3245 DB SOT339-1 20-Pin Plastic TSSOP Type I –40°C to 85°C CBT3245 PW CBT3245PW DH SOT360-1 PIN CONFIGURATION PIN DESCRIPTION SYMBOL NAME AND FUNCTION 1 NC No internal connection 19 OE Output enable input 2, 3, 4, 5, 6, 7, 8, 9 A1–A8 18, 17, 16, 15, 14, 13, 12, 11 B1–B8 NC 1 20 VCC A1 2 19 OE A2 3 18 B1 A3 4 17 B2 A4 5 16 B3 A5 6 15 B4 10 GND Ground (0V) A6 7 14 B5 20 VCC Positive supply voltage A7 8 13 B6 A8 9 12 B7 11 B8 GND 10 SA00507 1998 Dec 08 PIN NUMBER 2 Philips Semiconductors Preliminary specification Octal bus switch with output enable CBT3245 LOGIC SYMBOL A1 A8 FUNCTION TABLE 2 18 9 11 B1 INPUT INPUTS/OUTPUTS OE A, B L A=B H Z B8 H = High voltage level L = Low voltage level Z = High impedance “off ” state OE 19 SA00508 ABSOLUTE MAXIMUM RATINGS1, 2 PARAMETER SYMBOL VCC CONDITIONS RATING UNIT –0.5 to +7.0 V –50 mA –0.5 to +7.0 V VO < 0 –50 mA output in Off or High state –0.5 to +7 V output in Low state 128 mA –65 to 150 °C DC supply voltage IIK DC input diode current VI DC input voltage3 IOK DC output diode current VI < 0 voltage3 VOUT DC output IOUT DC output current Tstg Storage temperature range 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. RECOMMENDED OPERATING CONDITIONS LIMITS SYMBOL PARAMETER UNIT Min Max 5.5 VCC DC supply voltage 4.0 VIH High-level input voltage 2.0 VIL Low-level Input voltage Tamb 1998 Dec 08 Operating free-air temperature range –40 3 V V 0.8 V +85 °C Philips Semiconductors Preliminary specification Octal bus switch with output enable CBT3245 DC ELECTRICAL CHARACTERISTICS LIMITS SYMBOL PARAMETER TEST CONDITIONS Tamb = –40°C to +85°C Min VIK II ICC ∆ICC CI CIO(OFF) ron3 Input clamp voltage VCC = 4.5V; II = –18mA Input leakage current Quiescent supply current2 Typ1 UNIT Max –1.2 V VCC = 5.5V; VI = GND or 5.5V ±5 µA VCC = 5.5V; IO = 0, VI = VCC or GND 50 µA Additional supply current per input pin2 VCC = 5.5V, one input at 3.4V, other inputs at VCC or GND 3.5 mA Control pins VI= 3V or 0, OE = VCC 3 Power-off leakage current VO = 3V or 0 6 VCC = 4.5V; V1 = 0V; II = 64mA 5 On-resistance pF pF 7 VCC = 4.5V; V1 = 0V; II = 30mA 5 7 VCC = 4.5V; V1 = 2.4V; II = 15mA 10 15 Ω 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. AC CHARACTERISTICS GND = 0V; tR; CL = 50pF 74CBT3245 SYMBOL PARAMETER FROM (INPUT) TO (OUTPUT) Tamb = –40°C to +85°C VCC = +5.0V ±0.5V Min tpd Propagation delay1 ten tdis UNIT Max A or B B or A .25 ns Output enable time to High and Low level OE A or B ns Output disable time from High and Low level OE A or B ns NOTES: 1. This parameter is 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 50 pF, when driven by an ideal voltage source (zero output impedance). 1998 Dec 08 4 Philips Semiconductors Preliminary specification Octal bus switch with output enable CBT3245 AC WAVEFORMS VM = 1.5V, VIN = GND to 3.0V 3V 3V Output Control (Low-level enabling 1.5V 1.5V INPUT 1.5 V 1.5 V 0V 3.5V VOH 1.5V 0V tPLZ tPZL tPHL tPLH Output Waveform 1 S1 at 7 V (see Note) 1.5V OUTPUT 1.5 V Output Waveform 2 S1 at Open (see Note) SA00028 Waveform 1. Input to Output Propagation Delays VOL tPHZ tPZH VOL VOL + 0.3V 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. 3-State Output Enable and Disable Times TEST CIRCUIT AND WAVEFORMS 7V 500 Ω From Output Under Test S1 Open GND 500 Ω CL = 50 pF Load Circuit TEST S1 tpd open tPLZ/tPZL 7V tPHZ/tPZH open DEFINITIONS Load capacitance includes jig and probe capacitance; CL = see AC CHARACTERISTICS for value. SA00012 NOTES: 1. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, 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. 1998 Dec 08 5 Philips Semiconductors Preliminary specification Octal bus switch with output enable CBT3245 SO20: plastic small outline package; 20 leads; body width 7.5 mm 1998 Dec 08 6 SOT163-1 Philips Semiconductors Preliminary specification Octal bus switch with output enable CBT3245 SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm 1998 Dec 08 7 SOT339-1 Philips Semiconductors Preliminary specification Octal bus switch with output enable CBT3245 TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm 1998 Dec 08 8 SOT360-1 Philips Semiconductors Preliminary specification Octal bus switch with output enable CBT3245 NOTES 1998 Dec 08 9 Philips Semiconductors Preliminary specification Octal bus switch with output enable CBT3245 Data sheet status Data sheet status Product status Definition [1] Objective specification Development This data sheet contains the design target or goal specifications for product development. Specification may change in any manner without notice. Preliminary specification Qualification This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make chages at any time without notice in order to improve design and supply the best possible product. Product specification 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. [1] Please consult the most recently issued datasheet before initiating or completing a design. Definitions Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Disclaimers Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Right to make changes — Philips Semiconductors reserves 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. Copyright Philips Electronics North America Corporation 1998 All rights reserved. Printed in U.S.A. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088–3409 Telephone 800-234-7381 print code Document order number: yyyy mmm dd 10 Date of release: 05-96 9397-750-04607