Revised July 1999 74VCXH2245 Low Voltage Bidirectional Transceiver with Bushold and 26Ω Series Resistors in B Outputs General Description Features The VCXH2245 contains eight non-inverting bidirectional buffers with 3-STATE outputs and is intended for bus oriented applications. The T/R input determines the direction of data flow. The OE input disables both the A and B Ports by placing them in a high impedance state. The VCXH2245 data inputs include active bushold circuitry, eliminating the need for external pull-up resistors to hold unused or floating data inputs at a valid logic level. The 74VCXH2245 is designed for low voltage (1.65V to 3.6V) VCC applications. The VCXH2245 is also designed with 26Ω series resistance in the B Port outputs. This design reduces line noise in applications such as memory address drivers, clock drivers, and bus transceivers transmitters The 74VCXH2245 is fabricated with an advanced CMOS technology to achieve high-speed operation while maintaining low CMOS power dissipation. ■ 1.65V-3.6V VCC supply operation ■ 3.6V tolerant control inputs ■ Bushold on data inputs eliminates the need for external pull-up/pull-down resistors ■ 26Ω series resistors in B Port outputs ■ tPD (A to B) 4.4 ns max for 3.0V to 3.6V VCC 5.6 ns max for 2.3V to 2.7V VCC 9.8 ns max for 1.65V to 1.95V VCC ■ Static Drive (IOH/IOL B outputs): ±12 mA @ 3.0V VCC ±8 mA @ 2.3V VCC ±3 mA @ 1.65V VCC ■ Uses patented Quiet Series noise/EMI reduction circuitry ■ Latchup performance exceeds 300 mA ■ ESD performance: Human body model > 2000V Machine model > 200V Ordering Code: Order Number Package Number 74VCXH2245WM M20B 74VCXH2245MTC MTC20 Package Description 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Logic Symbol Connection Diagram Quiet Series is a trademark of Fairchild Semiconductor Corporation. © 1999 Fairchild Semiconductor Corporation ds500199 www.fairchildsemi.com 74VCXH2245 Low Voltage Bidirectional Transceiver with Bushold June 1999 74VCXH2245 Pin Descriptions Pin Names Truth Table Inputs Description Outputs OE T/R L L Bus B0–B7 Data to Bus A0–A7 Side A Bushold Inputs or 3-STATE Outputs L H Bus A0–A7 Data to Bus B0–B7 Side B Bushold Inputs or 3-STATE Outputs H X HIGH Z State on A0–A7, B0–B7 OE Output Enable Input (Active LOW) T/R Transmit/Receive Input A0–A7 B0–B7 H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impedance Logic Diagram www.fairchildsemi.com 2 Recommended Operating Conditions (Note 3) −0.5V to +4.6V Supply Voltage (VCC) DC Input Voltage (VI) Power Supply Voltage (VCC) −0.5V to 4.6 V T/R, OE Operating −0.5V to VCC + 0.5V I/O Ports DC Output Voltage (VO)(Note 2) −0.5V to VCC + 0.5V DC Input Diode Current (IIK) VI < 0V 1.65V to 3.6V Data Retention Only 1.2V to 3.6V −0.3V to VCC Input Voltage −50 mA Output Voltage (VO) 0V to VCC Output Current in IOH/IOL - A Outputs DC Output Diode Current (IOK) VO < 0V −50 mA VCC = 3.0V to 3.6V ±24 mA VO > VCC +50 mA VCC = 2.3V to 2.7V ±18 mA ±50 mA VCC = 1.65V to 2.3V ±6 mA DC Output Source/Sink Current Output Current in IOH/IOL - B Outputs (IOH/IOL) ±100 mA VCC = 3.0V to 3.6V ± 12 mA −65°C to +150°C VCC = 2.3V to 2.7V ± 8 mA DC VCC or Ground Current Storage Temperature (TSTG) VCC = 1.65V to 2.3V ± 3 mA Free Air Operating Temperature (TA) −40°C to +85°C Minimum Input Edge Rate (∆t/∆V) VIN = 0.8V to 2.0V, VCC = 3.0V 10 ns/V Note 1: The Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the Absolute Maximum Ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation. Note 2: IO Absolute Maximum Rating must be observed. Note 3: Floating or unused control inputs must be held HIGH or LOW. DC Electrical Characteristics Symbol (2.7V < VCC ≤ 3.6V) Parameter Conditions VCC (V) Min 2.0 VIH HIGH Level Input Voltage 2.7–3.6 VIL LOW Level Input Voltage 2.7–3.6 VOH VOL Max Units 0.8 V V HIGH Level Output Voltage IOH = −100 µA 2.7–3.6 VCC − 0.2 A Outputs IOH = −12 mA 2.7 2.2 IOH = −18 mA 3.0 2.4 IOH = −24 mA 3.0 2.2 HIGH Level Output Voltage IOH = −100 µA 2.7–3.6 VCC–0.2 B Outputs IOH = −6 mA 2.7 2.2 IOH = −8 mA 3.0 2.4 IOH = −12 mA 3.0 2.2 LOW Level Output Voltage IOL = 100 µA 2.7–3.6 0.2 A Outputs IOL = 12 mA 2.7 0.4 IOL = 18 mA 3.0 0.4 IOL = 24 mA 3.0 0.55 LOW Level Output Voltage IOL = 100 µA 2.7–3.6 0.2 B Outputs IOL = 6 mA 2.7 0.4 IOL = 8 mA 3.0 0.55 IOL = 12 mA 3.0 0.8 II Input Leakage Current VIN = VCC or GND II(HOLD) Bushold Input Minimum VIN = 0.8V 3.0 Drive Hold Current VIN = 2.0V 3.0 −75 II(OD) Bushold Input Over-Drive (Note 4) 3.6 450 3.6 −450 Current to Change State (Note 5) 3-STATE Output Leakage VO = VCC or GND VI = VIH or VIL 2.7–3.6 ICC Quiescent Supply Current VI = VCC or GND ∆ICC Increase in ICC per Input VIH = VCC −0.6V V ±5.0 2.7–3.6 IOZ V 75 V V µA µA µA ±10 µA 2.7–3.6 20 µA 2.7–3.6 750 µA Note 4: An external driver must source at least the specified current to switch from LOW-to-HIGH. Note 5: An external driver must sink at least the specified current to switch from HIGH-to-LOW. 3 www.fairchildsemi.com 74VCXH2245 Absolute Maximum Ratings(Note 1) 74VCXH2245 DC Electrical Characteristics Symbol Parameter (2.3V ≤ VCC ≤ 2.7V) Conditions VCC (V) Min 1.6 VIH HIGH Level Input Voltage 2.3–2.7 VIL LOW Level Input Voltage 2.3–2.7 VOH HIGH Level Output Voltage A Outputs HIGH Level Output Voltage B Outputs VOL IOH = −100 µA 2.3–2.7 V VCC − 0.2 IOH = −6 mA 2.3 2.0 IOH = −12 mA 2.3 1.8 IOH = −18 mA 2.3 1.7 IOH = −100 µA 2.3–2.7 VCC–2 IOH = −4 mA 2.3 2.0 IOH = −6 mA 2.3 1.8 1.7 V V IOH = −8mA 2.3 LOW Level Output Voltage IOL = 100 µA 2.3–2.7 0.2 A Outputs IOL = 12 mA 2.3 0.4 IOL = 18 mA 2.3 0.6 LOW Level Output Voltage IOL = 100 µA 2.3–2.7 0.2 B Outputs IOL = 6 mA 2.3 0.4 IOL = 8 mA 2.3 0.6 II Input Leakage Current VIN = VCC or GND Bushold Input Minimum VIN = 0.7V 2.3 45 Drive Hold Current VIN = 1.6V 2.3 −45 IOZ Units V 0.7 II(HOLD) II(OD) Max ±5.0 2.3–2.7 Bushold Input Over−Drive (Note 6) 2.7 300 Current to Change State (Note 7) 2.7 −300 3-STATE Output Leakage VO = VCC or GND V V µA µA µA 2.3–2.7 ±10 µA 2.3–2.7 20 µA Max Units VI = VIH or VIL ICC Quiescent Supply Current VI = VCC or GND Note 6: An external driver must source at least the specified current to switch from LOW-to-HIGH. Note 7: An external driver must sink at least the specified current to switch from HIGH-to-LOW. DC Electrical Characteristics Symbol Parameter (1.65V ≤ VCC < 2.3V) Conditions VCC (V) Min 0.65 x VCC VIH HIGH Level Input Voltage 1.65–2.3 VIL LOW Level Input Voltage 1.65–2.3 VOH HIGH Level Output Voltage IOH = −100 µA A Outputs IOH = −6 mA V 0.35 x VCC 1.65–1.95 VCC − 0.2 1.65 1.25 V HIGH Level Output Voltage IOH = −100 µA 1.65–2.3 VCC–0.2 B Outputs IOH = −3 mA 1.65 1.25 LOW Level Output Voltage IOL = 100 µA 1.65–2.3 0.2 A Outputs IOL = 6 mA 1.65 0.3 LOW Level Output Voltage IOL = 100µA 1.65–2.3 0.2 B Outputs IOL = 3 mA 1.65 0.3 II Input Leakage Current 0 ≤ VI ≤ 3.6V 1.65–2.3 II(HOLD) Bushold Input Minimum VIN = 0.57V 1.65 VOL II(OD) V ±5.0 25 Drive Hold Current VIN = 1.07V 1.65 −25 Bushold Input Over-Drive (Note 8) 1.95 200 1.95 −200 V V V µA µA µA Current to Change State (Note 9) IOZ 3-STATE Output Leakage VO = VCC or GND 1.65–2.3 ±10 µA ICC Quiescent Supply Current VI = VCC or GND 1.65–2.3 20 µA Note 8: An external driver must source at least the specified current to switch from LOW-to-HIGH. Note 9: An external driver must sink at least the specified current to switch from HIGH-to-LOW. www.fairchildsemi.com 4 TA = −40°C to +85°C, CL = 30 pF, RL = 500Ω Symbol Parameter tPHL Propagation Delay, tPLH A to B tPHL Propagation Delay, tPLH B to A tPZL Output Enable Time, tPZH A to B tPZL Output Enable Time, tPZH B to A tPLZ Output Disable Time, tPHZ A to B tPLZ Output Disable Time, tPHZ B to A tOSHL Output to Output Skew tOSLH (Note 11) VCC = 3.3V ± 0.3V VCC = 2.5V ± 0.2V VCC = 1.8V ± 0.15V Units Min Max Min Max Min Max 0.6 4.4 0.8 5.6 1.5 9.8 ns 0.6 3.5 0.8 4.2 1.5 8.4 ns 0.6 5.0 0.8 6.6 1.5 9.8 ns 0.6 4.5 0.8 5.6 1.5 9.8 ns 0.6 4.2 0.8 4.7 1.5 8.5 ns 0.6 3.6 0.8 4.0 1.5 7.2 ns 0.75 ns 0.5 0.5 Note 10: For CL = 50 pF, add approximately 300 ps to the AC maximum specification. Note 11: 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). Dynamic Switching Characteristics Symbol VOLP Parameter Quiet Output Dynamic Peak VOL, Conditions CL = 30 pF, VIH = VCC, VIL = 0V B to A Quiet Output Dynamic Peak VOL, CL = 30 pF, VIH = VCC, VIL = 0V A to B VOLV Quiet Output Dynamic Valley VOL, CL = 30 pF, VIH = VCC, V IL = 0V B to A Quiet Output Dynamic Valley, VOL, CL = 30 pF, VIH = VCC, V IL = 0V A to B VOHV Quiet Output Dynamic Valley VOH, CL = 30 pF, VIH = VCC, V IL = 0V B to A Quiet Output Dynamic Valley VOH, CL = 30 pF, VIH = VCC, V IL = 0V A to B VCC (V) TA = 25°C Units Typical 1.8 0.3 2.5 0.7 3.3 1.0 1.8 0.2 2.5 0.45 3.3 0.65 1.8 −0.3 2.5 −0.7 3.3 −1.0 1.8 −0.2 2.5 −0.45 3.3 −0.65 1.8 1.3 2.5 1.7 3.3 2.0 1.8 1.5 2.5 2.0 3.3 2.5 V V V V V V Capacitance Symbol Parameter Conditions TA = +25°C Units Typical CIN Input Capacitance VI = 0V or VCC, VCC = 1.8V, 2.5V or 3.3V 6 CI/O Input/Output Capacitance VI = 0V or VCC, VCC = 1.8V, 2.5V or 3.3V 7 pF CPD Power Dissipation Capacitance VI = 0V or VCC, f = 10 MHz, VCC = 1.8V, 2.5V or 3.3V 20 pF 5 pF www.fairchildsemi.com 74VCXH2245 AC Electrical Characteristics (Note 10) 74VCXH2245 AC Loading and Waveforms FIGURE 1. AC Test Circuit TEST SWITCH tPLH, tPHL Open tPZL, tPLZ 6V at VCC = 3.3 ± 0.3V; VCC x 2 at VCC = 2.5V ± 0.2V; 1.8V ± 0.15V tPZH, tPHZ GND FIGURE 2. Waveform for Inverting and Non-inverting Functions FIGURE 3. 3-STATE Output High Enable and Disable Times for Low Voltage Logic FIGURE 4. 3-STATE Output Low Enable and Disable Times for Low Voltage Logic VCC www.fairchildsemi.com Symbol 3.3V ± 0.3V 2.5V ± 0.2V 1.8V ± 0.15V Vmi 1.5V VCC/2 VCC/2 Vmo 1.5V VCC/2 VCC/2 Vx VOL + 0.3V VOL + 0.15V VOL + 0.15V Vy VOH − 0.3V VOH − 0.15V VOH − 0.15V 6 74VCXH2245 Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Package Number M20B 7 www.fairchildsemi.com 74VCXH2245 Low Voltage Bidirectional Transceiver with Bushold Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Package Number MTC20 Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. www.fairchildsemi.com www.fairchildsemi.com 8