Revised March 2000 74VCX164245 Low Voltage 16-Bit Dual Supply Translating Transceiver with 3-STATE Outputs General Description Features The VCX164245 is a dual supply, 16-bit translating transceiver that is designed for 2 way asynchronous communication between busses at different supply voltages by providing true signal translation. The supply rails consist of VCCB, which is the higher potential rail operating at 2.3 to 3.6V and VCCA, which is the lower potential rail operating at 1.65 to 2.7V. (VCCA must be less than or equal to VCCB for proper device operation.) This dual supply design allows for translation from 1.8V to 2.5V busses to busses at a higher potential, up to 3.3V. ■ Bidirectional interface between busses ranging from 1.65V to 3.6V The Transmit/Receive (T/R) input determines the direction of data flow. Transmit (active-HIGH) enables data from A Ports to B Ports; Receive (active-LOW) enables data from B Ports to A Ports.The Output Enable (OE) input, when HIGH, disables both A and P Ports by placing them in a High-Z condition. The A Port interfaces with the lower voltage bus (1.8 − 2.5V); The B Port interfaces with the higher voltage bus (2.7 − 3.3V). Also the VCX164245 is designed so that the control pins (T/Rn, OEn) are supplied by VCCB. The 74VCX164245 is suitable for mixed voltage applications such as notebook computers using a 1.8V CPU and 3.3V peripheral components. It is fabricated with an Advanced CMOS technology to achieve high speed operation while maintaining low CMOS power dissipation. ■ Supports Live Insertion and Withdrawal (Note 1) ■ Static Drive (IOH/IOL) ±24 mA @ 3.0V VCC ±18 mA @ 2.3V VCC ±6 mA @ 1.65V VCC ■ Uses patented noise/EMI reduction circuitry ■ Functionally compatible with 74 series 16245 ■ Latchup performance exceeds 300 mA ■ ESD performance: Human Body Model >2000V Machine model >200V Note 1: To ensure the high impedance state during power up or power down, OEn should be tied to VCCB through a pull up resistor. The minimum value of the resistor is determined by the current sourcing capability of the driver. Ordering Code: Order Number Package Number Package Description 74VCX164245MTD MTD48 48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code. Logic Diagram Pin Descriptions Pin Names Description OEn Output Enable Input (Active LOW) T/Rn Transmit/Receive Input A0–A15 Side A Inputs or 3-STATE Outputs B0–B15 Side B Inputs or 3-STATE Outputs Quiet Series is a trademark of Fairchild Semiconductor Corporation. © 2000 Fairchild Semiconductor Corporation DS500159 www.fairchildsemi.com 74VCX164245 Low Voltage 16-Bit Dual Supply Translating Transceiver with 3-STATE Outputs March 2000 74VCX164245 Connection Diagram Truth Tables Inputs OE1 T/R1 Outputs L L Bus B0–B7 Data to Bus A0–A7 L H Bus A0–A7 Data to Bus B0–B7 H X HIGH Z State on A0–A7, B0–B7 Inputs OE2 T/R2 Outputs L L Bus B8–B15 Data to Bus A8–A15 L H Bus A8–A15 Data to Bus B8–B15 H X HIGH-Z State on A8–A15, B8–B15 H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial (HIGH or LOW, inputs may not float) Z = High Impedance Translator Power Up Sequence Recommendations sourcing capability of the driver. Second, the T/Rn control pins should be placed at logic low (0V) level, this will ensure that the B-side bus pins are configured as inputs to help guard against bus contention and oscillations. B-side Data Inputs should be driven to a valid logic level (0V or VCCB), this will prevent excessive current draw and oscillations. VCCA can then be powered up after VCCB, but should never exceed the VCCB voltage level. Upon completion of these steps the device can then be configured for the users desired operation. Following these steps will help to prevent possible damage to the translator device as well as other system components. To guard against power up problems, some simple guidelines need to be adhered to. The VCX164245 is designed so that the control pins (T/Rn, OEn) are supplied by VCCB. Therefore the first recommendation is to begin by powering up the control side of the device, VCCB. The OEn control pins should be ramped with or ahead of VCCB, this will guard against bus contentions and oscillations as all A-Port and B Port outputs will be disabled. To ensure the high impedance state during power up or power down, OEn should be tied to VCCB through a pull up resistor. The minimum value of the resistor is determined by the current Logic Diagrams Please note that these diagrams are provided only for the understanding of logic operations and should not be used to estimate propagation delays. www.fairchildsemi.com 2 Recommended Operating Conditions (Note 4) Supply Voltage VCCA −0.5V to VCCB VCCB −0.5V to 4.6V VCCA 1.65V to 2.7V −0.5V to +4.6V VCCB 2.3V to 3.6V DC Input Voltage (VI) Power Supply (Note 5) DC Output Voltage (VI/O) Input Voltage (VI) @ OE, T/R −0.5V to +4.6V Outputs 3-STATE Outputs Active (Note 3) An 0V to VCCA Bn 0V to VCCB An −0.5V to VCCA + 0.5V Bn −0.5V to VCCB + 0.5V Output Current in IOH/IOL −50 mA VCCA = 1.65V to 1.95V VCCA = 2.3V to 2.7V DC Input Diode Current (IIK) VI < 0V −50 mA VO > VCC +50 mA VCCB = 2.3V to 2.7V VIN = 0.8V to 2.0V, VCC = 3.0V ±100 mA 10 ns/V Note 2: 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. Supply Pin (ICC or Ground) −65°C to +150°C Storage Temperature (TSTG) ±18 mA −40°C to +85°C Minimum Input Edge Rate (∆t/∆V) (IOH/IOL) DC VCC or Ground Current ±6 mA ±24 mA Free Air Operating Temperature (TA) ±50 mA DC Output Source/Sink Current ±18 mA VCCB = 3.0V to 3.6V DC Output Diode Current (IOK) VO < 0V 0V to VCCB Input/Output Voltage (VI/O) Note 3: IO Absolute Maximum Rating must be observed. Note 4: Unused inputs or I/O pins must be held HIGH or LOW. They may not float. Note 5: Operation requires: VCCA ≤ VCCB DC Electrical Characteristics (1.65V < VCCA ≤ 1.95V, 2.3V < VCCB ≤ 2.7V) Symbol VIHA Parameter HIGH Level Input Voltage An VIHB VILA Bn, T/R, OE LOW Level Input Voltage An VILB VOHA Conditions Bn, T/R, OE HIGH Level Output Voltage IOH = −100 µA IOH = −6 mA VOHB VOLA HIGH Level Output Voltage LOW Level Output Voltage LOW Level Output Voltage VCCB (V) Min 1.65−1.95 2.3−2.7 0.65 x VCC 1.65−1.95 2.3−2.7 1.6 1.6−1.95 2.3−2.7 1.65−1.95 2.3−2.7 1.65−1.95 2.3−2.7 VCCA−0.2 1.65 2.3−2.7 1.25 Max Units V V 0.35 x VCC V 0.7 V V IOH = −100 µA 1.65−1.95 2.3−2.7 VCCB−0.2 IOH = −18 mA 1.65−1.95 2.3 1.7 IOL = 100 µA 1.65−1.95 2.3−2.7 0.2 1.65 2.3−2.7 0.3 IOL = 100 µA 1.65−1.95 2.3−2.7 0.2 IOL = 18 mA 1.65−1.95 2.3 0.6 1.65−1.95 2.3−2.7 ±5.0 µA 1.65−1.95 2.3−2.7 ±10 µA 0 0 10 µA 1.65−1.95 2.3−2.7 20 µA 1.65−1.95 2.3−2.7 ±20 µA IOL = 6 mA VOLB VCCA (V) II Input Leakage Current @ OE, T/R 0V ≤ VI ≤ 3.6V IOZ 3-STATE Output Leakage 0V ≤ VO ≤ 3.6V OE = VCCB V V V VI = VIH or VIL IOFF Power OFF Leakage Current 0≤ (VI, VO) ≤ 3.6V ICCA/ICCB Quiescent Supply Current, An = VCCA or GND per supply, VCCA / VCCB Bn, OE, & T/R = V CCB or GND VCCA ≤ An ≤ 3.6V VCCB ≤ Bn, OE, T/R ≤ 3.6V ∆ICC Increase in ICC per Input, Bn, T/R, OE VI = VCCB – 0.6V 1.65−1.95 2.3−2.7 750 µA Increase in ICC per Input, An VI = VCCA – 0.6V 1.65−1.95 2.3−2.7 750 µA 3 www.fairchildsemi.com 74VCX164245 Absolute Maximum Ratings(Note 2) 74VCX164245 DC Electrical Characteristics (1.65V < VCCA ≤ 1.95V, 3.0V < VCCB ≤ 3.6V) Symbol Parameter Conditions VCCA (V) VCCB (V) Min Max Units VIHA HIGH Level An 1.65–1.95 3.0–3.6 0.65 x VCC V VIHB Input Voltage Bn, T/R, OE 1.65–1.95 3.0–3.6 2.0 V VILA LOW Level An 1.65–1.95 3.0–3.6 0.35 x VCC V VILB Input Voltage Bn, T/R, OE 1.65–1.95 3.0–3.6 0.8 V VOHA HIGH Level Output Voltage IOH = −100 µA IOH = −6 mA VOHB VOLA HIGH Level Output Voltage LOW Level Output Voltage LOW Level Output Voltage 3.0–3.6 VCCA–0.2 1.65 3.0–3.6 1.25 V IOH = −100 µA 1.65–1.95 3.0–3.6 VCCA–0.2 IOH = −24 mA 1.65–1.95 3.0 2.2 IOL = 100 µA 1.65–1.95 3.0–3.6 0.2 1.65 3.0–3.6 0.3 IOL = 100 µA 1.65–1.95 3.0–3.6 0.2 IOL = 24 mA 1.65–1.95 3.0 0.55 1.65–1.95 3.0–3.6 ±5.0 µA 1.65–1.95 3.0–3.6 ±10 µA 0 0 10 µA 1.65–1.95 3.0–3.6 20 µA 1.65–1.95 3.0–3.6 ±20 µA IOL = 6 mA VOLB 1.65–1.95 II Input Leakage Current @ OE, T/R 0V ≤ VI ≤ 3.6V IOZ 3-STATE Output Leakage 0V ≤ VO ≤ 3.6V OE* = VCCB V V V VI = V IH or VIL IOFF Power Off Leakage Current 0 ≤ (VI, VO) ≤ 3.6V ICCA/ICCB Quiescent Supply Current, An = VCCA or GND per supply, VCCA/VCCB Bn, OE, & T/R = VCCB or GND VCCA ≤ An ≤ 3.6V VCCB ≤ Bn, OE, T/R ≤ 3.6V ∆ICC Increase in ICC per Input, Bn, T/R, OE VI = V CCB − 0.6V 1.65–1.95 3.0–3.6 750 µA Increase in ICC per Input, An VI = V CCA − 0.6V 1.65–1.95 3.0–3.6 750 µA DC Electrical Characteristics (2.3V < VCCA ≤ 2.7V, 3.0V ≤ VCCB ≤ 3.6V) Symbol VIHA Parameter HIGH Level Input Voltage An VIHB VILA Bn, T/R, OE LOW Level Input Voltage An VILB VOHA Conditions Bn, T/R, OE HIGH Level Output Voltage VCCA (V) VCCB (V) Min 2.3–2.7 3.0–3.6 1.6 V 2.3–2.7 3.0–3.6 2.0 V Max Units 2.3–2.7 3.0–3.6 0.7 V 2.3–2.7 3.0–3.6 0.8 V IOH = −100 µA 2.3–2.7 3.0–3.6 IOH = −18 mA 2.3 3.0–3.6 1.7 3.0–3.6 VCCB–0.2 2.2 VCCA–0.2 V VOHB HIGH Level Output Voltage IOH = −100 µA 2.3–2.7 IOH = −24 mA 2.3–2.7 3.0 VOLA LOW Level Output Voltage IOL = 100 µA 2.3–2.7 3.0–3.6 0.2 IOL = 18 mA 2.3 3.0–3.6 0.6 VOLB LOW Level Output Voltage IOL = 100 µA 2.3–2.7 3.0–3.6 0.2 IOL = 24 mA 2.3–2.7 3.0 0.55 2.3–2.7 3.0–3.6 ±5.0 µA 2.3–2.7 3.0–3.6 ±10 µA 0 0 10 µA 2.3–2.7 3.0–3.6 20 µA 2.3–2.7 3.0–3.6 ±20 µA II Input Leakage Current @ OE, T/R 0V ≤ VI ≤ 3.6V IOZ 3-STATE Output Leakage @ An 0V ≤ VO ≤ 3.6V OE = VCCA V V V VI = V IH or VIL IOFF Power OFF Leakage Current 0 ≤ (VI, VO) ≤ 3.6V ICCA/ICCB Quiescent Supply Current, An = VCCA or GND per supply, VCCA/VCCB Bn, OE, & T/R = VCCB or GND VCCA ≤ An ≤ 3.6V VCCB ≤ Bn, OE, T/R ≤ 3.6V ∆ICC Increase in ICC per Input, Bn, T/R, OE VI = V CCB − 0.6V 2.3–2.7 3.0–3.6 750 µA Increase in ICC per Input, An VI = V CCA − 0.6V 2.3–2.7 3.0–3.6 750 µA www.fairchildsemi.com 4 CL = 30 pF, RL = 500Ω, TA = −40°C to +85°C, Symbol Parameter VCCA = 1.65V to 1.95V VCCA = 1.65V to 1.95V VCCA = 2.3V to 2.7V VCCB = 2.3V to 2.7V VCCB = 3.0V to 3.6V VCCB = 3.0V to 3.6V Units Min Max Min Max Min Max tPHL, tPLH Prop Delay, A to B 0.8 5.5 0.6 5.1 0.6 4.0 ns tPHL, tPLH Prop Delay, B to A 1.5 5.8 1.5 6.2 0.8 4.4 ns tPZL, tPZH Output Enable Time, OE to B 0.8 5.3 0.6 5.1 0.6 4.0 ns tPZL, tPZH Output Enable Time, OE to A 1.5 8.3 1.5 8.2 0.8 4.6 ns tPLZ, tPHZ Output Disable Time, OE to B 0.8 5.2 0.8 5.6 0.8 4.8 ns tPLZ, tPHZ Output Disable Time, OE to A 0.8 4.6 0.8 4.5 0.8 4.4 ns tosHL Output to Output Skew tosLH (Note 6) 0.75 ns 0.5 0.5 Note 6: 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 VCCA (V) VCCB (V) TA = 25°C Typical 1.8 2.5 0.25 1.8 3.3 0.25 2.5 3.3 0.6 1.8 2.5 0.6 1.8 3.3 0.8 2.5 3.3 0.8 1.8 2.5 −0.25 1.8 3.3 −0.25 2.5 3.3 −0.6 1.8 2.5 −0.6 1.8 3.3 −0.8 2.5 3.3 −0.8 1.8 2.5 1.7 1.8 3.3 2.0 2.5 3.3 2.0 1.8 2.5 1.3 1.8 3.3 1.3 2.5 3.3 1.7 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, VIL = 0V B to A Quiet Output Dynamic Valley VOL, CL = 30 pF, VIH = VCC, VIL = 0V A to B VOHV Quiet Output Dynamic Valley VOH, CL = 30 pF, VIH = VCC, VIL = 0V A to B Quiet Output Dynamic Valley VOH, CL = 30 pF, VIH = VCC, VIL = 0V B to A Units V V V V V V Capacitance Symbol Parameter Conditions TA = +25°C Typical Units CIN Input Capacitance VCCA = 2.5V, VCCB = 3.3V, VI = 0V or VCCA/B 5 pF CI/O Input/Output Capacitance VCCA = 2.5V, VCCB = 3.3V, VI = 0V or VCCA/B 6 pF CPD Power Dissipation Capacitance VCCA = 2.5V, VCCB = 3.3V, VI = 0V or VCCA/B 20 pF f = 10 MHz 5 www.fairchildsemi.com 74VCX164245 AC Electrical Characteristics 74VCX164245 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 = 2.5 ± 0.2V; 1.8V ± 0.15V tPZH, tPHZ GND FIGURE 2. Waveform for Inverting and Non-inverting Functions tR = tF ≤ 2.0 ns, 10% to 90% FIGURE 3. 3-STATE Output High Enable and Disable Times for Low Voltage Logic tR = tF ≤ 2.0 ns, 10% to 90% FIGURE 4. 3-STATE Output Low Enable and Disable Times for Low Voltage Logic tR = tF ≤ 2.0 ns, 10% to 90% Symbol www.fairchildsemi.com VCC 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 74VCX164245 Physical Dimensions inches (millimeters) unless otherwise noted 48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide Package Number MTD48 7 www.fairchildsemi.com 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 8 www.fairchildsemi.com 74VCX164245 Low Voltage 16-Bit Dual Supply Translating Transceiver with 3-STATE Outputs 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.