74LVCH245A OCTAL BUS TRANSCEIVER WITH BUS HOLD / 3 STATE OUTPUTS Description Pin Assignments The 74LVCH245A is an octal transceiver designed for asynchronous communication between data buses. The device transmits data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE) pin can be used to disable the device so the buses effectively are NEW PRODUCT isolated. The device is designed for operation with a power supply range of 1.65V to 3.6V. The inputs are tolerant to 5.5V allowing this device to be used in a mixed voltage environment. The device is fully specified for partial power down applications using IOFF. The IOFF circuitry disables the output preventing damaging current backflow when the device is powered down. Bus hold circuitry holds unused or undriven inputs at a high or low logic state. The use of external pull-up or pull down resistors is not recommended. Applications • General Purpose Logic Features • Bus Driving • • Supply Voltage Range from 1.65V to 3.6V Sinks or Sources 24ma at VCC = 3V • Power Down Signal Isolation • • • CMOS Low Power Consumption IOFF Supports Partial Power Down Operation • Inputs or Outputs Accept Up to 5.5V • Inputs Can Be Driven by 3.3V or 5V Allowing for Mixed Voltage Wide array of products such as: PCs, Notebooks, Netbooks, Ultrabooks Networking Computer Peripherals, Hard Drives, CD/DVD ROM TV, DVD, DVR, Set Top Box Applications • • Schmitt Trigger Action at All Inputs Typical VOLP (Quiet Output Ground Bounce) Less Than 0.8V with VCC = 3.3V and TA = +25°C • Typical VOHV (Quiet Output dynamic VOH) Greater than 2.0V with VCC = 3.3V and TA = +25°C • • • ESD Protection Tested per JESD 22 Exceeds 200-V Machine Model (A115) Exceeds 2000-V Human Body Model (A114) Exceeds 1000-V Charged Device Model (C101) Latch-Up Exceeds 250mA per JESD 78, Class I All devices are: Totally Lead-Free & Fully RoHS compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen and Antimony free, "Green" and Lead-Free. 3. Halogen and Antimony free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. 74LVCH245A Document number: DS35891 Rev. 1 - 2 1 of 10 www.diodes.com July 2014 © Diodes Incorporated 74LVCH245A Ordering Information 74 LVC Logic Device Function NEW PRODUCT 74 : Logic Prefix H245 : Package OCTAL BUS TRANSCEIVER WITH BUS HOLD / 3 STATE OUTPUTS Part Number Package Code Package (Note 4 & 5) 74LVCH245AT20-13 T20 TSSOP-20 74LVCH245AQ20-13 Q20 V-QFN4525-20 Notes: H245A xxx -13 Packing T20 : TSSOP-20 Q20 : QFN-20 Package Size 6.4mm X 6.5mm X 1.2mm 0.65 mm lead pitch 2.5mm X 4.5mm X 0.95mm 0.50 mm lead pitch -13 : 13” Tape & Reel 13” Tape and Reel Quantity Part Number Suffix 2500/Tape & Reel -13 2500/Tape & Reel -13 4. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. 5. V-QFN4525-20 is a JEDEC recognized naming convention that specifies the package thickness category as V and the number 4525 describes the package as 4.5mm X 2.5mm. Pin Descriptions Logic Diagram 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Pin Name DIR 1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1 GND 2A1 1Y4 2A2 1Y3 2A3 1Y2 2A4 1Y1 Direction Control Data Input Data Output Data Input Data Output Data Input Data Output Data Input Data Output Ground Data Input Data Output Data Input Data Output Data Input Data Output Data Input Data Output 19 2OE Output Enable 2 20 Vcc Supply Voltage Pin Number Function Table INPUTS Description 74LVCH245A Document number: DS35891 Rev. 1 - 2 2 of 10 www.diodes.com OE DIR L L H L H X Operation B Data to A Bus A Data to B Bus Bus Isolation July 2014 © Diodes Incorporated 74LVCH245A Absolute Maximum Ratings (Notes 6 & 7) Symbol ESD HBM ESD CDM ESD MM Rating 2 1 200 Unit kV kV V V Supply Voltage Range -0.5 to +7.0 VI Input Voltage Range -0.5 to +7.0 V IIK Input Clamp Current -20 mA IOK Output Clamp Current VCC NEW PRODUCT Description Human Body Model ESD Protection Charged Device Model ESD Protection Machine Model ESD Protection IO VI< 0V VO< 0V Continuous Output Current -0.5V < VO VCC +0.5V -50 mA ±50 mA ICC Continuous Current Through VCC 100 mA IGND Continuous Current Through GND -100 mA Operating Junction Temperature -40 to +150 °C TSTG Storage Temperature -65 to +150 °C PTOT Total Power Dissipation 500 mW TJ Notes: 6. Stresses beyond the absolute maximum may result in immediate failure or reduced reliability. These are stress values and device operation should be within recommend values. 7. Forcing the maximum allowed voltage could cause a condition exceeding the maximum current or conversely forcing the maximum current could cause a condition exceeding the maximum voltage. The ratings of both current and voltage must be maintained within the controlled range. Recommended Operating Conditions Symbol VCC Parameter Supply Voltage VI Input Voltage VO Output Voltage IOH IOL High-Level Output Current Low-Level Output Current Conditions Operating Data Retention Only — Min 1.65 1.5 Max 3.6 — Unit V V 0 5.5 V — 0 VCC V VCC = 1.65V — -4 VCC = 2.3V — -8 VCC = 2.7V — -12 VCC = 3.0V — -24 VCC = 1.65V — 4 VCC = 2.3V — 8 VCC = 2.7V — 12 VCC = 3.0V — 24 mA mA ∆t/∆V Input Transition Rise or Fall Rate — 10 ns/V TA Operating Free-Air Temperature -40 +125 °C 74LVCH245A Document number: DS35891 Rev. 1 - 2 3 of 10 www.diodes.com July 2014 © Diodes Incorporated 74LVCH245A Electrical Characteristics Symbol VIH NEW PRODUCT VIL VOH VOL IOFF II Parameter Test Conditions High-Level Input Voltage Low-Level input voltage High-Level Output Voltage Low-Level Output Voltage TA = -40°C to +85°C Min TA = -40°C to +125°C Max Min Max 1.65V to 1.95 VCC X 0.65 — VCC X 0.65 — 2.3V to 2.7V 1.7 — 1.7 — 3.0V to 3.6 V 2 — 2 — 1.65V to 1.95 — VCC X 0.35 — VCC X 0.35 2.3V to 2.7V — 0.7 — 0.7 3.0 V to 3.6V — 0.8 — 0.8 — IOH = -50μA 1.65V to 5.5V VCC-0.2 — VCC-0.3 IOH = -4mA 1.65V 1.2 — 1.05 — IOH = -8mA 2.3V 1.7 — 1.65 — 2.7V 2.2 — 2.05 — 3.V 2.4 — 2.48 — IOH = -24mA 3.0V 2.3 — 2.0 — IOL = 100μA 1.65V to 5.5V — 0.2 — 0.3 IOH = -12mA IOL = 4mA 1.65V — 0.45 — 0.65 IOL = 8mA 2.3V — 0.60 — 0.80 IOL = 12mA 2.7V — 0.40 — 0.60 Unit V V V V IOL = 24mA 3.V — 0.55 — 0.80 Power Down Leakage Current VI or VO = 0 or 5.5V 0V — ±10 — ±20 μA Input Current Control Pins VI = GND or 5.5V 0 to 5.5V — ±5 — ±20 μA — VI = 0.58V VI = 1.07 VI = 0.7V II(HOLD) VCC Input Current Required to Change VI = 1.7V State VI = 0.8V VI = 2.0V 1.65V 2.3V 3.0V 25 — 15 -25 — -15 — 45 — 35 — -45 — -35 — 75 — 60 — -75 — -60 — VI = 0 or 3.6V 3.6V — ±500 — ±500 μA IOZ Z-State current VI = GND or 5.5V VO = 0 or 5.5V 3.6V — ±5 — ± 20 uA ICC Supply Current VI = GND or VCC IO = 0 6.0V — 10 — 40 μA Additional Supply Current One input at VCC -0.6V Io = 0A 2.7V to 3.6V — 500 — 5000 μA Input Capacitance Output Capacitance VI = GND or VCC 3.3V 4.0 typical 4.0 typical VO = GND or VCC 3.3V 5.5 typical 5.5 typical ∆ICC Ci Co 74LVCH245A Document number: DS35891 Rev. 1 - 2 4 of 10 www.diodes.com pF July 2014 © Diodes Incorporated 74LVCH245A Switching Characteristics Symbol Parameter Propagation Delay AN to BN or BN to AN NEW PRODUCT tPD Test Conditions Figure 1 Enable Time OE to AN or OE to BN tEN Figure 1 Disable Time OE to AN or OE to BN tDIS Figure 1 Output Skew Time tsk(0) TA = +25°C VCC TA = -40°C to +85°C Min Max TA = -40°C to +125°C Min Max Min Ty Max 1.8V ± 0.15V 1 6.0 12.2 1 12.7 1 16.9 2.5V ± 0.2V 1 3.9 8.1 1 8.5 1 9.1 2.7V 1 4.2 8.7 1 9.6 1 9.9 3.3V ± 0.3V 1.5 3.8 8.1 1.5 8.7 1.5 9.2 1.8V ± 0.15V 1 7 14.8 1 15.3 1 22.5 2.5V ± 0.2V 1 4.5 10 1 10.5 1 12.4 2.7V 1 5.4 9.3 1 9.5 1 12.0 11.0 3.3V ± 0.3V 1.5 4.4 8.3 1.5 8.5 1.5 1.8V ± 0.15V 1 7.8 16.5 1 17 1 18.4 2.5V ± 0.2V 1 4 9 1 9.5 1 10.5 2.7V 1 4.4 8.3 1 8.5 1 10.0 3.3V ± 0.3V 1.7 4.1 7.3 1.7 7.5 1.7 9.0 3.3V ± 0.3V — — 1.0 — — — 1.5 Unit ns ns ns ns Operating Characteristics TA = +25°C Symbol Parameter Power dissipation capacitance per gate Cpd Test Conditions F = 10MHz Outputs Enabled VCC 1.8V ± 0.15V 2.5V ± 0.2V 3.3V ± 0.3V Typ Unit 9.9 10.2 10.6 pF Package Characteristics Symbol θJA θJC θJA θJC Note: Parameter Thermal Resistance Junction-to-Ambient Thermal Resistance Junction-to-Case Thermal Resistance Junction-to-Ambient Thermal Resistance Junction-to-Case Package Test Conditions Min Typ Max Unit TSSOP-20 (Note 8) — 74 — °C/W TSSOP-20 (Note 8) — 15 — °C/W V-QFN4525-20 (Note 8) — 67 — °C/W V-QFN4525-20 (Note 8) — 20 — °C/W 8. Test conditions for TSSOP-20 and V-QFN4525-20: Devices mounted on 4 layer FR-4 substrate PC board, 2oz copper, with minimum recommended pad layout per JESD 51-7. 74LVCH245A Document number: DS35891 Rev. 1 - 2 5 of 10 www.diodes.com July 2014 © Diodes Incorporated 74LVCH245A NEW PRODUCT Parameter Measurement Information TEST tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Inputs VCC VM VLOAD CL ≤2ns VCC/2 2 x VCC ≤2ns VCC/2 2 x VCC 2.7V ≤2.5ns 1.5V 2.7V ≤2.5ns 1.5V VI tr/tf 1.8V ± 0.15V VCC 2.5V ± 0.2V VCC 2.7V 3.3V ± 0.3V S1 Open VLOAD GND RL V∆ 30pF 1KΩ 0.15V 30pF 500Ω 0.15V 6V 50pF 500Ω 0.3V 6V 50pF 500Ω 0.3V Voltage Waveform Pulse Duration Voltage Waveform Enable and Disable Times Low and High Level Enabling Voltage Waveform Propagation Delay Times Inverting and Non Inverting Outputs Notes: A. Includes test lead and test apparatus capacitance. B. All pulses are supplied at pulse repetition rate ≤ 10 MHz. C. Inputs are measured separately one transition per measurement. D. tPLZ and tPHZ are the same as tdis. E. tPZL and tPZH are the same as tEN0 F. tPLH and tPHL are the same as tPD. Figure 1 Load Circuit and Voltage Waveforms 74LVCH245A Document number: DS35891 Rev. 1 - 2 6 of 10 www.diodes.com July 2014 © Diodes Incorporated 74LVCH245A Marking Information (1) TSSOP20 NEW PRODUCT 74LVCH245A Part Number 74LVCH245AT20 (2) Package TSSOP-20 QFN-20 (V-QFN4525-20) ( Top View ) YY : Year : 08, 09,10~ WW : Week : 01~52; 52 Logo Part Number 74LVCH245A represents 52 and 53 week X X : Internal Codes YY WW X X terminal 1 index area Part Number 74LVCH245AQ20 74LVCH245A Document number: DS35891 Rev. 1 - 2 Package V-QFN4525-20 7 of 10 www.diodes.com July 2014 © Diodes Incorporated 74LVCH245A Package Outline Dimensions (All Dimensions in mm) Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version. (1) TSSOP-20 D NEW PRODUCT θ2 E1 E 0.25 Gauge Plane θ3 PIN 1 ID MARK Seating Plane θ1 e L DETAIL L1 A2 b (2) A TSSOP-20 Dim Min Max Typ A 1.20 A1 0.05 0.15 A2 0.80 1.05 b 0.19 0.30 c 0.09 0.20 D 6.40 6.60 6.50 E 6.20 6.60 6.40 E1 4.30 4.50 4.40 e 0.65 BSC L 0.45 0.75 0.60 L1 1.0 REF 0° 8° θ1 10° 14° 12° θ2 10° 14° 12° θ3 All Dimensions in mm A1 QFN-20 (V-QFN4525-20) 1 A 3 A A e n a l P g n i t a e S D I 1 # n i P ︶ D ︵ e x 4 1 Z ︵ ︶ E 2 E 2 D x 0 2 L ︵ Document number: DS35891 Rev. 1 - 2 ︵ x 0 2 74LVCH245A b x 4 Z ︵ ︶ ︶ V-QFN4525-20 Dim Min Max Typ A 0.75 0.85 0.80 A1 0.00 0.05 0.02 A3 0.15 b 0.18 0.30 0.23 D 4.45 4.55 4.50 D2 2.85 3.15 3.00 E 2.45 2.55 2.50 E2 0.85 1.15 1.00 e 0.50BSC L 0.30 0.50 0.40 Z 0.385 Z1 0.885 All Dimensions in mm ︶ 8 of 10 www.diodes.com July 2014 © Diodes Incorporated 74LVCH245A Suggested Pad Layout Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version. (1) TSSOP-20 X (20x) NEW PRODUCT C Y1 Dimensions C X X1 Y Y1 Y2 Y2 Y (20x) Value (in mm) 0.650 0.420 6.270 1.789 4.160 7.720 X1 (2) QFN-20 (V-QFN4525-20) 4 X 3 X 1 X 2 X 3 Y 1 Y 2 Y Y Document number: DS35891 Rev. 1 - 2 Value (in mm) 0.500 0.330 0.600 3.200 3.830 4.800 0.600 1.200 0.830 2.800 C X 74LVCH245A Dimensions C X X1 X2 X3 X4 Y Y1 Y2 Y3 9 of 10 www.diodes.com July 2014 © Diodes Incorporated 74LVCH245A IMPORTANT NOTICE NEW PRODUCT DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. 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