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74LVT2244 * 74LVTH2244 Low Voltage Octal Buffer/Line Driver with 3-STATE Outputs and 25 Series Resistors in the Outputs
July 1999 Revised November 2000
74LVT2244 * 74LVTH2244 Low Voltage Octal Buffer/Line Driver with 3-STATE Outputs and 25 Series Resistors in the Outputs
General Description
The LVT2244 and LVTH2244 are octal buffers and line drivers designed to be employed as memory address drivers, clock drivers and bus oriented transmitters or receivers which provides improved PC board density. The equivalent 25-Series resistors helps reduce output overshoot and undershoot. The LVTH2244 data inputs include bushold, eliminating the need for external pull-up resistors to hold unused inputs. These octal buffers and line drivers are designed for lowvoltage (3.3V) VCC applications, but with the capability to provide a TTL interface to a 5V environment. The LVT2244 and LVTH2244 are fabricated with an advanced BiCMOS technology to achieve high speed operation similar to 5V ABT while maintaining low power dissipation.
Features
s Input and output interface capability to systems at 5V VCC s Equivalent 25-Series resistors on outputs s Bushold data inputs eliminate the need for external pull-up resistors to hold unused inputs (74LVTH2244), also available without bushold feature (74LVT2244). s Live insertion/extraction permitted s Power Up/Down high impedance provides glitch-free bus loading s Outputs source/sink -12 mA/+12 mA s Latch-up performance exceeds 500 mA s ESD performance: Human-body model > 2000V Machine model > 200V Charged-device model > 1000V
Ordering Code:
Order Number 74LVT2244WM 74LVT2244SJ 74LVT2244MTC 74LVTH2244WM 74LVTH2244SJ 74LVTH2244MTC Package Number M20B M20D MTC20 M20B M20D MTC20 Package Description 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm 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.
(c) 2000 Fairchild Semiconductor Corporation
DS012170
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74LVT2244 * 74LVTH2244
Logic Symbol
IEEE/IEC
Pin Descriptions
Pin Names OE1, OE2 I0-I7 O0-O7 Description 3-STATE Output Enable Inputs Inputs Outputs
Truth Tables
Inputs OE1 L L H Inputs OE2 In L H X L H Z In L H X L H Z Outputs (Pins 3, 5, 7, 9) Outputs (Pins 12, 14, 16, 18)
Connection Diagram
L L H
H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impedance
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74LVT2244 * 74LVTH2244
Absolute Maximum Ratings(Note 1)
Symbol VCC VI VO IIK IOK IO ICC IGND TSTG Parameter Supply Voltage DC Input Voltage DC Output Voltage DC Input Diode Current DC Output Diode Current DC Output Current DC Supply Current per Supply Pin DC Ground Current per Ground Pin Storage Temperature Value Conditions Units V V Output in 3-STATE Output in HIGH or LOW State (Note 2) VI < GND VO < GND VO > VCC Output at HIGH State VO > VCC Output at LOW State V V mA mA mA mA mA
-0.5 to +4.6 -0.5 to +7.0 -0.5 to +7.0 -0.5 to +7.0 -50 -50
64 128
64 128 -65 to +150
C
Recommended Operating Conditions
Symbol VCC VI IOH IOL TA Supply Voltage Input Voltage HIGH-Level Output Current LOW-Level Output Current Free-Air Operating Temperature Input Edge Rate, VIN = 0.8V-2.0V, VCC = 3.0V Parameter Min 2.7 0 Max 3.6 5.5 Units V V mA
-12
12
-40
0
85 10
C
ns/V
t/V
Note 1: 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. Note 2: IO Absolute Maximum Rating must be observed.
DC Electrical Characteristics
Symbol Parameter VCC (V) 2.7 2.7-3.6 2.7-3.6 2.7-3.6 3.0 VOL II(HOLD) (Note 4) II(OD) (Note 4) II Bushold Input Over-Drive Current to Change State Input Current Control Pins Data Pins IOFF IPU/PD IOZL IOZH IOZH+ ICCH ICCL ICCZ Power Off Leakage Current Power up/down 3-STATE Output Current 3-STATE Output Leakage Current 3-STATE Output Leakage Current 3-STATE Output Leakage Current Power Supply Current Power Supply Current Power Supply Current 3.6 3.6 3.6 0 0-1.5V 3.6 3.6 3.6 3.6 3.6 3.6 3.0 Output LOW Voltage Bushold Input Minimum Drive 2.7 3.0 3.0 75 -75 500 -500 10 1 -5 1 100 100 -5 5 10 0.19 5 0.19 VCC - 0.2 2.0 0.2 0.8 2.0 0.8 TA =-40C to +85C Min Typ (Note 3) Units Max -1.2 V V V V V V A A A A A A A A A A A A A mA mA mA II = -18 mA VO 0.1V or VO VCC - 0.1V IOH = -100 A IOH = -12 mA IOL = 100 A IOL = 12 mA VI = 0.8V VI = 2.0V (Note 5) (Note 6) VI = 5.5V VI = 0V or VCC VI = 0V VI = VCC 0V VI or VO 5.5V VO = 0.5V to 3.0V VI = GND or VCC VO = 0.5V VO = 3.0V VCC < VO 5.5V Outputs HIGH Outputs LOW Outputs Disabled Conditions
VIK VIH VIL VOH
Input Clamp Diode Voltage Input HIGH Voltage Input LOW Voltage Output HIGH Voltage
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74LVT2244 * 74LVTH2244
DC Electrical Characteristics
Symbol ICCZ+ ICC Parameter Power Supply Current Increase in Power Supply Current (Note 7)
Note 3: All typical values are at VCC = 3.3V, TA = 25C. Note 4: Applies to bushold versions only (74LVTH2244).
(Continued)
TA =-40C to +85C Min Typ (Note 3) Max 0.19 0.2 Units mA mA Conditions VCC V O 5.5V, Outputs Disabled 3.6 One Input at VCC - 0.6V Other Inputs at VCC or GND
VCC (V) 3.6
Note 5: An external driver must source at least the specified current to switch from LOW-to-HIGH. Note 6: An external driver must sink at least the specified current to switch from HIGH-to-LOW. Note 7: This is the increase in supply current for each, input that is at the specified voltage level rather than VCC or GND.
Dynamic Switching Characteristics
Symbol VOLP VOLV Parameter Quiet Output Maximum Dynamic VOL Quiet Output Minimum Dynamic VOL VCC (V) 3.3 3.3
(Note 8)
TA = 25C Min Typ 0.8 -0.8 Max V V Units Conditions CL = 50 pF, RL = 500 (Note 9)
Note 8: Characterized in SOIC package. Guaranteed parameter, but not tested. Note 9: Max number of outputs defined as (n). n-1 data inputs are driven 0V to 3V. Output under test held LOW.
AC Electrical Characteristics
TA = -40C to +85C CL = 50 pF, RL = 500 Symbol Parameter Min tPLH tPHL tPZH tPZL tPHZ tPLZ tOSHL tOSLH Output to Output Skew (Note 11) Output Disable Time Output Enable Time Propagation Delay Data to Output 1.0 1.0 1.0 1.1 1.9 1.8 VCC = 3.3V 0.3V Typ (Note 10) 4.4 4.1 5.9 5.5 6.1 4.5 1.0 1.0 1.0 1.0 1.1 1.9 1.8 5.3 4.4 7.7 6.2 6.8 4.5 1.0 ns ns ns ns Max VCC = 2.7V Min Max Units
Note 10: All typical values are at VCC = 3.3V, TA = 25C. 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).
Capacitance
Symbol CIN COUT
(Note 12)
Parameter Conditions VCC = 0V, VI = 0V or VCC VCC = 3.0V, VO = 0V or VCC Typical 3 6 Units pF pF
Input Capacitance Output Capacitance
Note 12: Capacitance is measured at frequency f = 1 MHz, per MIL-STD-883B, Method 3012.
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74LVT2244 * 74LVTH2244
Physical Dimensions inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide Package Number M20B
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74LVT2244 * 74LVTH2244
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M20D
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74LVT2244 * 74LVTH2244 Low Voltage Octal Buffer/Line Driver with 3-STATE Outputs and 25 Series Resistors in the Outputs
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: 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. 7 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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