TC7MB3245FT/FK Toshiba CMOS Digital Integrated Circuit Silicon Monolithic TC7MB3245FT, TC7MB3245FK Octal Bus Switch The TC7MB3245 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 device is organized as one 8-bit switch. When output 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. All inputs are equipped with protection circuits against static discharge. TC7MB3245FT TC7MB3245FK Features • Operating voltage: VCC = 4.5 to 5.5 V • High speed: tpd = 0.25 ns (max) • Low on resistance: RON = 5 Ω (typ.) • ESD performance: Machine model ≥ ±200 V Human body model ≥ ±2000 V • Compatible with TTL outputs (control inputs) • Package: TSSOP20,VSSOP20 (US20) • Pin compatible with the 74xx245 type. Weight TSSOP20-P-0044-0.65A VSSOP20-P-0030-0.50 Functionally equivalent to (FST/CBT) 3245. : 0.08 g (typ.) : 0.03 g (typ.) Pin Assignment (top view) NC 1 20 VCC A1 2 19 OE A2 3 18 B1 A3 4 17 B2 A4 5 16 B3 A5 6 15 B4 A6 7 14 B5 A7 8 13 B6 A8 9 12 B7 GND 10 11 B8 (top view) NC-No Internal Connection 1 2008-09-01 TC7MB3245FT/FK Truth Table Inputs Function OE L A port = B port H Disconnect System Diagram A1 B1 A8 B8 OE Absolute Maximum Ratings (Note) Characteristics Symbol Rating Unit Power supply range VCC −0.5 to 7.0 V DC input voltage VIN −0.5 to 7.0 V DC switch voltage VS −0.5 to 7.0 V Input diode current IIK −50 mA Continuous channel circuit IS 128 mA Power dissipation PD 180 mW ICC/IGND ±100 mA Tstg −65 to 150 °C DC VCC/ground current Storage temperature Note: Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or even destruction. Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the significant change in temperature, etc.) may cause this product to decrease in the reliability significantly even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute maximum ratings and the operating ranges. Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook (“Handling Precautions”/“Derating Concept and Methods”) and individual reliability data (i.e. reliability test report and estimated failure rate, etc). Operating Ranges (Note) Characteristics Symbol Rating Unit Supply voltage VCC 4.5 to 5.5 V Input voltage VIN 0 to 5.5 V Switch voltage VS 0 to 5.5 V Operating temperature Topr −40 to 85 °C Input rise and fall time dt/dv 0 to 10 ns/V Note: The operating ranges must be maintained to ensure the normal operation of the device. 2 2008-09-01 TC7MB3245FT/FK Electrical Characteristics DC Characteristics (Ta = −40 to 85°C) Characteristics Symbol Test Condition Min Typ. (Note 1) Max VCC (V) Unit “H” level VIH ⎯ 4.5to5.5 2.0 ⎯ ⎯ “L” level VIL ⎯ 4.5to5.5 ⎯ ⎯ 0.8 4.5to5.5 ⎯ ⎯ ±1.0 μA 0 ⎯ ⎯ ±1.0 μA 4.5to5.5 ⎯ ⎯ ±1.0 μA IIS = 64 mA 4.5 ⎯ 5 7 IIS = 30 mA 4.5 ⎯ 5 7 VIS = 2.4 V, IIS = 15 mA 4.5 ⎯ 10 15 VIN = VCC or GND, IOUT = 0 5.5 ⎯ ⎯ 10 μA VIN = 3.4 V (one input) 5.5 ⎯ ⎯ 2.5 mA Input voltage Input leakage current IIN Power off leakage current IOFF Off-STATE leakage current ISZ (switch off) ON resistance (Note 2) RON Quiescent supply current ICC Increase in ICC per input ΔICC VIN = 0 to 5.5 V A, B, OE = 0 to 5.5 V A, B = 0 to 5.5 V, OE = VCC VIS = 0 V V Ω Note 1: Typical values are at VCC = 5 V, Ta = 25°C. Note 2: 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. AC Characteristics (Ta = −40 to 85°C) Characteristics Min Max Unit 4.5 ⎯ 0.25 ns Figure 1, Figure 3 4.5 ⎯ 5.9 ns Figure 1, Figure 3 4.5 ⎯ 5.9 ns Symbol Test Condition VCC (V) Propagation delay time tpLH (bus to bus) tpHL Output enable time tpZL Figure 1, Figure 2 (Note) tpZH Output disable time tpLZ tpHZ Note: This parameter is guaranteed by design but is not tested. 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 the source (zero output impedance). Capacitive Characteristics (Ta = 25°C) Characteristics Symbol Test Condition Typ. Unit VCC (V) Control pin input capacitance CIN Switch terminal capacitance CI/O OE = VCC (Note) 5.0 3 pF (Note) 5.0 10 pF Note: Parameter guaranteed by design. 3 2008-09-01 TC7MB3245FT/FK AC Test Circuit RL Switch Open 7.0 V GND Measure RL CL Output CL = 50 pF RL = 500 Ω Parameter Switch tpLH, tpHL Open tpLZ, tpZL 7.0 V tpHZ, tpZH Open Figure 1 AC Waveform tf 2.5 ns tr 2.5 ns 3.0 V 90% 1.5 V Input (A, B) 10% GND VOH Output (B, A) 1.5 V tpLH VOL tpHL Figure 2 tpLH, tpHL tf 2.5 ns tr 2.5 ns 3.0 V 90% 1.5 V Output Enable ( OE ) 10% tpLZ GND tpZL 3.5 V Output (A, B) Low to Off to Low 1.5 V tpHZ VOL + 0.3 V VOL tpZH VOH VOH − 0.3 V Output (A, B) High to Off to High 1.5 V GND Outputs enabled Outputs disabled Outputs enabled Figure 3 tpLZ, tpHZ, tpZL, tpZH 4 2008-09-01 TC7MB3245FK Package Dimensions Weight: 0.08g (typ.) 5 2008-09-01 TC7MB3245FK Package Dimensions Weight: 0.03g (typ.) 6 2008-09-01 TC7MB3245FK RESTRICTIONS ON PRODUCT USE • Toshiba Corporation, and its subsidiaries and affiliates (collectively “TOSHIBA”), reserve the right to make changes to the information in this document, and related hardware, software and systems (collectively “Product”) without notice. • This document and any information herein may not be reproduced without prior written permission from TOSHIBA. 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