74VCXH245 Low−Voltage 1.8/2.5/3.3V 8−Bit Transceiver (3-State, Non-Inverting with Bushold) The 74VCXH245 is an advanced performance, non-inverting 8-bit transceiver. It is designed for very high-speed, very low-power operation in 1.8 V, 2.5 V or 3.3 V systems. The 74VCXH245 is designed as a byte control. The Transmit/Receive (T/Rn) inputs determine the direction of data flow through the bi- directional transceiver. Transmit (active- HIGH) enables data from A ports to B ports; Receive (active-LOW) enables data from B to A ports. The Output Enable input (OE), when HIGH, disables both A and B ports by placing them in a HIGH Z condition. The data inputs include active bushold circuitry, eliminating the need for external pull-up resistors to hold unused or floating inputs at a valid logic state. • Designed for Low Voltage Operation: VCC = 1.65-3.6 V • High Speed Operation: 3.5 ns max for 3.0 to 3.6 V • • • • • 4.2 ns max for 2.3 to 2.7 V 8.4 ns max for 1.65 to 1.95 V Static Drive: ±24 mA Drive at 3.0 V ±18 mA Drive at 2.3 V ±6 mA Drive at 1.65 V Includes Active Bushold to Hold Unused or Floating Data Inputs at a Valid Logic State Near Zero Static Supply Current in All Three Logic States (20 A) Substantially Reduces System Power Requirements Latchup Performance Exceeds ±200 mA @ 85°C ESD Performance: Human Body Model >2000 V; Machine Model >200 V Semiconductor Components Industries, LLC, 2003 April, 2003 - Rev. 7 1 http://onsemi.com MARKING DIAGRAMS (Top View) 1 20 DQFN SUFFIX TBD CASE 485AA A WL YY WW VCXH 245 ALYW = Assembly Location = Wafer Lot = Year = Work Week Publication Order Number: 74VCXH245/D 74VCXH245 OE 19 19 12 T/R 1 11 20 DQFN PIN #1 A0 10 2 18 2 9 A1 3 17 Figure 1. Pinout (Top View) A2 A3 PINS FUNCTION OE T/R A0-A7 B0-B7 Output Enable Input Transmit/Receive Input Side A Bushold Inputs or 3-State Outputs Side B Bushold Inputs or 3-State Outputs 13 OE T/R OPERATING MODE Non-Inverting L L B Data to A Bus L H A Data to B Bus H X Z State A6 http://onsemi.com 2 B6 9 11 H = High Voltage Level L = Low Voltage Level Z = High Impedance State X = High or Low Voltage Level and Transitions are Acceptable B5 8 12 A7 B4 7 TRUTH TABLE INPUTS B3 6 14 A5 B2 5 15 A4 B1 4 16 PIN NAMES B0 Figure 2. Logic Diagram B7 74VCXH245 ABSOLUTE MAXIMUM RATINGS* Symbol Parameter VCC DC Supply Voltage VI Value Condition Unit -0.5 to + 4.6 V DC Input Voltage -0.5 ≤ VI ≤ VCC + 0.5 V VO DC Output Voltage -0.5 ≤ VO ≤ VCC + 0.5 Note 1 V IIK DC Input Diode Current -50 VI < GND mA IOK DC Output Diode Current -50 VO < GND mA +50 VO > VCC mA IO DC Output Source/Sink Current ±50 mA ICC DC Supply Current Per Supply Pin ±100 mA IGND DC Ground Current Per Ground Pin ±100 mA TSTG Storage Temperature Range -65 to +150 °C * Absolute maximum continuous ratings are those values beyond which damage to the device may occur. Exposure to these conditions or conditions beyond those indicated may adversely affect device reliability. Functional operation under absolute-maximum-rated conditions is not implied. 1. IO absolute maximum rating must be observed. RECOMMENDED OPERATING CONDITIONS** Symbol Parameter Operating Data Retention Only Min Typ Max Unit 1.65 1.2 3.3 3.3 3.6 3.6 V -0.3 VCC V 0 VCC V VCC Supply Voltage VI Input Voltage VO Output Voltage IOH HIGH Level Output Current, VCC = 3.0 V - 3.6 V -24 mA IOL LOW Level Output Current, VCC = 3.0 V - 3.6 V 24 mA IOH HIGH Level Output Current, VCC = 2.3 V - 2.7 V -18 mA IOL LOW Level Output Current, VCC = 2.3 V - 2.7 V 18 mA IOH HIGH Level Output Current, VCC = 1.65 V - 1.95 V -6 mA IOL LOW Level Output Current, VCC = 1.65 V - 1.95 V 6 mA TA Operating Free-Air Temperature -40 +85 °C t/V Input Transition Rise or Fall Rate, VIN from 0.8 V to 2.0 V, VCC = 3.0 V 0 10 ns/V **Floating or unused control inputs must be held HIGH or LOW. http://onsemi.com 3 74VCXH245 DC ELECTRICAL CHARACTERISTICS TA = -40°C to +85°C Symbol VIH VIL VOH VOL HIGH Level Input Voltage (Note 2) LOW Level Input Voltage (Note 2) HIGH Level Output Voltage LOW Level Output Voltage II Input Leakage Current II(HOLD) ( ) Minimum Bushold Input Current II(OD) ( ) Minimum Bushold Over-Drive Current Needed to Change State Min 1.65 V ≤ VCC < 1.95 V 0.65 x VCC 2.3 V ≤ VCC ≤ 2.7 V 1.6 2.7 V < VCC ≤ 3.6 V 2.0 Max V 1.65 V ≤ VCC < 1.95 V 0.35 x VCC 2.3 V ≤ VCC ≤ 2.7 V 0.7 2.7 V < VCC ≤ 3.6 V 0.8 1.65 V ≤ VCC ≤ 3.6 V; IOH = -100 A VCC - 0.2 VCC = 1.65 V; IOH = -6 mA 1.25 VCC = 2.3 V; IOH = -6 mA 2.0 VCC = 2.3 V; IOH = -12 mA 1.8 VCC = 2.3 V; IOH = -18 mA 1.7 VCC = 2.7 V; IOH = -12 mA 2.2 VCC = 3.0 V; IOH = -18 mA 2.4 VCC = 3.0 V; IOH = -24 mA 2.2 0.2 VCC = 1.65 V; IOL = 6 mA 0.3 VCC = 2.3 V; IOL = 12 mA 0.4 VCC = 2.3 V; IOL = 18 mA 0.6 VCC = 2.7 V; IOL = 12 mA 0.4 VCC = 3.0 V; IOL = 18 mA 0.4 VCC = 3.0 V; IOL = 24 mA 0.55 VIN = VCC or GND; VCC = 3.6 V ±5.0 75 VCC = 3.0 V, VIN = 2.0 V -75 VCC = 2.3 V, VIN = 0.7 V 45 VCC = 2.3 V, VIN = 1.6 V -45 VCC = 1.65 V, VIN = 0.57 V 25 VCC = 1.65 V, VIN = 1.07 V -25 VCC = 3.6 V, (Note 3) 450 VCC = 3.6 V, (Note 4) -450 VCC = 2.7 V, (Note 3) 300 VCC = 2.7 V, (Note 4) -300 VCC = 1.95 V, (Note 3) 200 VCC = 1.95 V, (Note 4) -200 V V 1.65 V ≤ VCC ≤ 3.6 V; IOL = 100 A VCC = 3.0 V, VIN = 0.8 V Unit V A A A VO = VCC or GND; VCC = 3.6 V; VI = VIH or VIL ±10 A Quiescent Supply Current (Note 5) 1.65 V ≤ VCC ≤ 3.6 V; VI = GND or VCC 20 A Increase in ICC per Input 2.7 V < VCC ≤ 3.6 V; VIH = VCC - 0.6 V 750 A IOZ 3-State Output Current ICC ICC 2. 3. 4. 5. Condition Characteristic These values of VI are used to test DC electrical characteristics only. An external driver must source at least the specified current to switch from LOW-to-HIGH. An external driver must sink at least the specified current to switch from HIGH-to-LOW. Outputs disabled or 3-state only. http://onsemi.com 4 74VCXH245 AC CHARACTERISTICS (Note 6; tR = tF = 2.0 ns; CL = 30 pF; RL = 500 ) Limits TA = -40°C to +85°C VCC = 3.0 V to 3.6 V Symbol Parameter VCC = 2.3 V to 2.7 V VCC = 1.65 V to1.95 V Waveform Min Max Min Max Min Max Unit tPLH tPHL Propagation Delay Input to Output 1 0.6 0.6 3.5 3.5 0.8 0.8 4.2 4.2 1.5 1.5 8.4 8.4 ns tPZH tPZL Output Enable Time to High and Low Level 2 0.6 0.6 4.5 4.5 0.8 0.8 5.6 5.6 1.5 1.5 9.8 9.8 ns tPHZ tPLZ Output Disable Time From High and Low Level 2 0.6 0.6 3.6 3.6 0.8 0.8 4.0 4.0 1.5 1.5 7.2 7.2 ns tOSHL tOSLH Output-to-Output Skew (Note 7) 0.75 0.75 ns 0.5 0.5 0.5 0.5 6. For CL = 50 pF, add approximately 300 ps to the AC maximum specification. 7. Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. The specification applies to any outputs switching in the same direction, either HIGH-to-LOW (tOSHL) or LOW-to-HIGH (tOSLH); parameter guaranteed by design. DYNAMIC SWITCHING CHARACTERISTICS TA = +25°C Symbol VOLP VOLV VOHV Condition Typ Unit VCC = 1.8 V, CL = 30 pF, VIH = VCC, VIL = 0 V 0.3 V VCC = 2.5 V, CL = 30 pF, VIH = VCC, VIL = 0 V 0.7 VCC = 3.3 V, CL = 30 pF, VIH = VCC, VIL = 0 V 1.0 VCC = 1.8 V, CL = 30 pF, VIH = VCC, VIL = 0 V -0.3 VCC = 2.5 V, CL = 30 pF, VIH = VCC, VIL = 0 V -0.7 VCC = 3.3 V, CL = 30 pF, VIH = VCC, VIL = 0 V -1.0 VCC = 1.8 V, CL = 30 pF, VIH = VCC, VIL = 0 V 1.3 VCC = 2.5 V, CL = 30 pF, VIH = VCC, VIL = 0 V 1.7 VCC = 3.3 V, CL = 30 pF, VIH = VCC, VIL = 0 V 2.0 Characteristic Dynamic LOW Peak Voltage (N (Note 8)) Dynamic LOW Valley Voltage ( (Note 8)) Dynamic HIGH Valley Voltage (N (Note 9)) V V 8. Number of outputs defined as “n”. Measured with “n-1” outputs switching from HIGH-to-LOW or LOW-to-HIGH. The remaining output is measured in the LOW state. 9. Number of outputs defined as “n”. Measured with “n-1” outputs switching from HIGH-to-LOW or LOW-to-HIGH. The remaining output is measured in the HIGH state. CAPACITIVE CHARACTERISTICS Symbol Parameter Condition Typical Unit CIN Input Capacitance Note 10 6 pF COUT Output Capacitance Note 10 7 pF CPD Power Dissipation Capacitance Note 10, 10 MHz 20 pF 10. VCC = 1.8, 2.5 or 3.3 V; VI = 0 V or VCC. http://onsemi.com 5 74VCXH245 VIH Vm An, Bn Vm tPLH 0V tPHL Vm Bn, An VOH Vm VOL WAVEFORM 1 − PROPAGATION DELAYS tR = tF = 2.0 ns, 10% to 90%; f = 1 MHz; tW = 500 ns VIH Vm OEn, T/Rn Vm 0V tPZH tPHZ VOH Vy Vm An, Bn ≈ 0V tPZL tPLZ ≈ VCC Vm An, Bn Vx VOL WAVEFORM 2 − OUTPUT ENABLE AND DISABLE TIMES tR = tF = 2.0 ns, 10% to 90%; f = 1 MHz; tW = 500 ns Figure 3. AC Waveforms VCC Symbol 3.3 V ± 0.3 V 2.5 V ± 0.2 V 1.8 V ± 0.15 V VIH 2.7 V VCC VCC Vm 1.5 V VCC/2 VCC/2 Vx VOL + 0.3 V VOL + 0.15 V VOL + 0.15 V Vy VOH - 0.3 V VOH - 0.15 V VOH - 0.15 V VCC PULSE GENERATOR RL DUT RT CL RL SWITCH TEST tPLH, tPHL Open tPZL, tPLZ 6 V at VCC = 3.3 ± 0.3 V; VCC× 2 at VCC = 2.5 ± 0.2 V; 1.8 V ± 0.15 V tPZH, tPHZ GND CL = 30 pF or equivalent (Includes jig and probe capacitance) RL = 500 or equivalent RT = ZOUT of pulse generator (typically 50 ) Figure 4. Test Circuit http://onsemi.com 6 6 V or VCC × 2 OPEN GND 74VCXH245 PACKAGE DIMENSIONS D DQFN SUFFIX TBD CASE 485AA-01 ISSUE O A B PIN ONE REFERENCE DIM A A1 A2 A3 b D D2 E E2 e K L E 2X 0.15 C 2X 0.15 C 0.10 C A2 20X A 0.08 C SEATING PLANE (A3) A1 C D2 e 11 20X L 9 12 e E2 20X b 0.10 C A B 0.05 C NOTE 3 20X K 19 2 NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994. 2. CONTROLLING DIMENSION: MILLIMETERS. 3. DIMENSIONS b APPLIES TO PLATED TERMINAL AND IS MEASURED BETWEEN 0.25 AND 0.30 MM FROM TERMINAL. 4. COPLANARITY APPLIES TO THE EXPOSED PAD AS WELL AS THE TERMINALS. 1 http://onsemi.com 7 MILLIMETERS MIN MAX 0.80 1.00 0.00 0.05 0.65 0.75 0.20 REF 0.20 0.30 2.50 BSC 0.85 1.15 4.50 BSC 1.85 2.15 0.50 BSC 0.20 −−− 0.35 0.45 74VCXH245 Xmax = 0.28 0.5 Pitch 0.65 1.45 2.8 3.45 All Dimensions in mm. 4.80 Figure 5. 20 Pad DQFN Suggested Board Layout (Bottom View) ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. 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