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74VCX162827 Low Voltage 20-Bit Buffer/Line Driver with 3.6V Tolerant Inputs and Outputs and 26 Series Resistors in the Outputs
March 1998 Revised October 2004
74VCX162827 Low Voltage 20-Bit Buffer/Line Driver with 3.6V Tolerant Inputs and Outputs and 26 Series Resistors in the Outputs
General Description
The VCX162827 contains twenty non-inverting buffers with 3-STATE outputs to be employed as a memory and address driver, clock driver, or bus oriented transmitter/ receiver. The device is byte controlled. Each byte has NOR output enables for maximum control flexibility. The 74VCX162827 is designed for low voltage (1.4V to 3.6V) VCC applications with I/O capability up to 3.6V. The VCX162827 is also designed with 26 resistors in the outputs. The 74VCX162827 is fabricated with an advanced CMOS technology to achieve high speed operation while maintaining low CMOS power dissipation.
Features
s 1.4V-3.6V VCC supply operation s 3.6V tolerant inputs and outputs s 26 series resistors in outputs s tPD 3.4 ns max for 3.0V to 3.6V VCC s Power-off high impedance inputs and outputs s Supports live insertion and withdrawal (Note 1) s Static Drive (IOH/IOL)
12 mA @ 3.0V VCC
s Uses patented noise/EMI reduction circuitry s Latch-up performance exceeds 300 mA s ESD performance: Human body model > 2000V Machine model > 200V
Note 1: To ensure the high-impedance state during power up or power down, OE should be tied to VCC 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 74VCX162827MTD Package Number MTD56 Package Description 56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Devices also available in Tape and Reel. Specify by appending the suffix "X" to the ordering code.
Logic Symbol
Pin Descriptions
Pin Names OEn I0-I19 O0-O19 Description Output Enable Input (Active LOW) Inputs Outputs
(c) 2004 Fairchild Semiconductor Corporation
DS500138
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74VCX162827
Connection Diagram
Truth Tables
Inputs OE1 L L H X OE2 L L X H Inputs OE3 L L H X OE4 L L X H I0-I9 L H X X I0-I9 L H X X Outputs O0-O9 L H Z Z Outputs O10-O19 L H Z Z
H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial (HIGH or LOW, inputs may not float) Z = High Impedance
Functional Description
The 74VCX162827 contains twenty non-inverting buffers with 3-STATE outputs. The device is byte controlled with each byte functioning identically, but independent of each other. The control pins may be shorted together to obtain full 20-bit operation. The 3-STATE outputs are controlled by Output Enable (OEn) inputs. When OE1, and OE2 are LOW, O0-O10 are in the 2-state mode. When either OE1 or OE2 are HIGH, the standard outputs are in the high impedance mode but this does not interfere with entering new data into the inputs. The same applies for byte two with OE3 and OE4.
Logic Diagrams
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74VCX162827
Absolute Maximum Ratings(Note 2)
Supply Voltage (VCC) DC Input Voltage (VI) Output Voltage (VO) Outputs 3-STATE Outputs Active (Note 3) DC Input Diode Current (IIK) VI < 0V DC Output Diode Current (IOK) VO < 0V VO > VCC DC Output Source/Sink Current (IOH/IOL) DC VCC or GND Current per Supply Pin (ICC or GND) Storage Temperature Range (TSTG)
-0.5V to +4.6V -0.5V to +4.6V -0.5V to +4.6V -0.5V to VCC + 0.5V -50 mA -50 mA +50 mA 50 mA 100 mA -65C to +150C
Recommended Operating Conditions (Note 4)
Power Supply Operating Input Voltage Output Voltage (VO) Output in Active States Output in 3-STATE Output Current in IOH/IOL VCC = 3.0V to 3.6V VCC = 2.3V to 2.7V VCC = 1.65V to 2.3V VCC = 1.4V to 1.6V Free Air Operating Temperature (TA) Minimum Input Edge Rate (t/V) VIN = 0.8V to 2.0V, VCC = 3.0V 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. Note 3: IO Absolute Maximum Rating must be observed. Note 4: Floating or unused inputs must be held HIGH or LOW.
1.4V to 3.6V
-0.3V to +3.6V
0V to VCC 0.0V to 3.6V
12 mA 8 mA 3 mA 1 mA -40C to +85C
DC Electrical Characteristics
Symbol VIH Parameter HIGH Level Input Voltage Conditions VCC (V) 2.7 - 3.6 2.3 - 2.7 1.65 - 2.3 1.4 - 1.6 VIL LOW Level Input Voltage 2.7 - 3.6 2.3 - 2.7 1.65 - 2.3 1.4 - 1.6 VOH HIGH Level Output Voltage IOH = -100 A IOH = -6 mA IOH = -8 mA IOH = -12 mA IOH = -100 A IOH = -4 mA IOH = -6 mA IOH = -8 mA IOH = -100 A IOH = -3 mA IOH = -100 A IOH = -1 mA 2.7 - 3.6 2.7 3.0 3.0 2.3 - 2.7 2.3 2.3 2.3 1.65 - 2.3 1.65 1.4 - 1.6 1.4 VCC - 0.2 2.2 2.4 2.2 VCC - 0.2 2.0 1.8 1.7 VCC - 0.2 1.25 VCC - 0.2 1.05 V Min 2.0 1.6 0.65 x VCC 0.65 x VCC 0.8 0.7 0.35 x VCC 0.35 x VCC V V Max Units
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74VCX162827
DC Electrical Characteristics
Symbol VOL Parameter LOW Level Output Voltage
(Continued)
VCC (V) 2.7 - 3.6 2.7 3.0 3.0 2.3 - 2.7 2.3 2.3 1.65 - 2.3 1.65 1.4 - 1.6 1.4 1.4 - 3.6 1.4 - 3.6 0 1.4 - 3.6 1.4 - 3.6 2.7 - 3.6
Conditions IOL = 100 A IOL = 6 mA IOL = 8 mA IOL = 12 mA IOL = 100 A IOL = 6 mA IOL = 8 mA IOL = 100 A IOL = 3 mA IOL = 100 A IOL = 1 mA
Min
Max 0.2 0.4 0.55 0.8 0.2 0.4 0.6 0.2 0.3 0.2 0.35 5.0 10.0 10.0 20.0 20.0 750
Units
V
II IOZ IOFF ICC ICC
Input Leakage Current 3-STATE Output Leakage Power-OFF Leakage Current Quiescent Supply Current Increase in ICC per Input
0 VI 3.6V 0 VO 3.6V VI = VIH or VIL 0 (VI, VO) 3.6V VI = VCC or GND VCC (VI, VO) 3.6V (Note 5) VIH = VCC -0.6V
A A A A A
Note 5: Outputs disabled or 3-STATE only.
AC Electrical Characteristics (Note 6)
Symbol tPHL tPLH CL = 15 pF, RL = 2k tPZL tPZH CL = 15 pF, RL = 2k tPLZ tPHZ CL = 15 pF, RL = 2k tOSHL tOSLH Output to Output Skew (Note 7) CL = 15 pF, RL = 2k
Note 6: For CL = 50 PF, add approximately 300 ps to the AC maximum specification. Note 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 Propagation Delay
Conditions CL = 30 pF, RL = 500
VCC (V) 3.3 0.3 2.5 0.2 1.8 0.15 1.5 0.1 3.3 0.3 2.5 0.2 1.8 0.15 1.5 0.1 3.3 0.3 2.5 0.2 1.8 0.15 1.5 0.1 3.3 0.3 2.5 0.2 1.8 0.15 1.5 0.1
TA = -40C to +85C Min 0.8 1.0 1.5 1.0 0.8 1.0 1.5 1.0 0.8 1.0 1.5 1.0 Max 3.4 4.1 8.2 16.4 4.3 5.9 9.8 19.6 4.3 4.9 8.8 17.6 0.5 0.5 0.75 1.5
Units
Figure Number Figures 1, 2 Figures 5, 6 Figures 1, 3, 4 Figures 5, 7, 8 Figures 1, 3, 4 Figures 5, 7, 8
ns
Output Enable Time
CL = 30 pF, RL = 500
ns
Output Disable Time
CL = 30 pF, RL = 500
ns
CL = 30 pF, RL = 500
ns
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74VCX162827
Dynamic Switching Characteristics
Symbol VOLP Parameter Quiet Output Dynamic Peak VOL Conditions CL = 30 pF, VIH = VCC, VIL = 0V VCC (V) 1.8 2.5 3.3 VOLV Quiet Output Dynamic Valley VOL CL = 30 pF, VIH = VCC, VIL = 0V 1.8 2.5 3.3 VOHV Quiet Output Dynamic Valley VOH CL = 30 pF, VIH = VCC, VIL = 0V 1.8 2.5 3.3 TA = +25C Typical 0.15 0.25 0.35 -0.15 -0.25 -0.35 1.55 2.05 2.65 V V V Units
Capacitance
Symbol CIN COUT CPD Input Capacitance Output Capacitance Power Dissipation Capacitance Parameter Conditions VCC = 1.8, 2.5V or 3.3V, VI = 0V or VCC VI = 0V or VCC, VCC = 1.8V, 2.5V or 3.3V VI = 0V or VCC, f = 10 MHz, VCC = 1.8V, 2.5V or 3.3V TA = +25C Typical 6.0 7.0 20.0 Units pF pF pF
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74VCX162827
AC Loading and Waveforms (VCC 3.3V 0.3V to 1.8V 0.15V)
TEST tPLH , tPHL tPZL, tPLZ tPZH, tPHZ
SWITCH Open 6V at VCC = 3.3 0.3V; VCC x 2 at VCC = 2.5 0.2V; 1.8V 0.15V GND FIGURE 1. AC Test Circuit
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 Symbol Vmi Vmo VX VY VCC 3.3V 0.3V 1.5V 1.5V VOL + 0.3V VOH - 0.3V 2.5V 0.2V VCC/2 VCC/2 VOL + 0.15V VOH - 0.15V 1.8V 0.15V VCC/2 VCC/2 VOL + 0.15V VOH - 0.15V
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74VCX162827
AC Loading and Waveforms (VCC 1.5V 0.1V)
TEST tPLH, tPHL tPZL, tPLZ tPZH, tPHZ
SWITCH Open VCC x 2 at VCC = 1.5 0.1V GND FIGURE 5. AC Test Circuit
FIGURE 6. Waveform for Inverting and Non-Inverting Functions
FIGURE 7. 3-STATE Output High Enable and Disable Times for Low Voltage Logic
FIGURE 8. 3-STATE Output Low Enable and Disable Times for Low Voltage Logic Symbol Vmi Vmo VX VY VCC 1.5V 0.1V VCC/2 VCC/2 VOL + 0.1V VOH - 0.1V
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74VCX162827 Low Voltage 20-Bit Buffer/Line Driver with 3.6V Tolerant Inputs and Outputs and 26 Series Resistors in the Outputs
Physical Dimensions inches (millimeters) unless otherwise noted
56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide Package Number MTD56
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: 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 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. www.fairchildsemi.com

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