SN54LVT244A, SN74LVT244A 3.3-V ABT OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCAS354 – FEBRUARY 1994 • • • • • • 1OE 1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1 GND 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 VCC 2OE 1Y1 2A4 1Y2 2A3 1Y3 2A2 1Y4 2A1 SN54LVT244A . . . FK PACKAGE (TOP VIEW) 1A2 2Y3 1A3 2Y2 1A4 description 4 3 2 1 20 19 18 5 17 6 16 7 15 8 14 9 10 11 12 13 1Y1 2A4 1Y2 2A3 1Y3 2Y1 GND 2A1 1Y4 2A2 These octal buffers and line drivers are designed specifically for low-voltage (3.3-V) VCC operation, but with the capability to provide a TTL interface to a 5-V system environment. 2OE • SN54LVT244A . . . J PACKAGE SN74LVT244A . . . DB, DW, OR PW PACKAGE (TOP VIEW) State-of-the-Art Advanced BiCMOS Technology (ABT) Design for 3.3-V Operation and Low-Static Power Dissipation Supports Mixed-Mode Signal Operation (5-V Input and Output Voltages With 3.3-V VCC) Supports Unregulated Battery Operation Down to 2.7 V Typical VOLP (Output Ground Bounce) < 0.8 V at VCC = 3.3 V, TA = 25°C Latch-Up Performance Exceeds 500 mA Per JEDEC Standard JESD-17 Bus-Hold Data Inputs Eliminate the Need for External Pullup Resistors Supports Live Insertion Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB), and Thin Shrink Small-Outline (PW) Packages, Ceramic Chip Carriers (FK), and Ceramic DIPs (J) 2Y4 1A1 1OE VCC • The ′LVT244A is organized as two 4-bit line drivers with separate output-enable (OE) inputs. When OE is low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the high-impedance state. Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. The SN74LVT244A is available in TI’s shrink small-outline package (DB), which provides the same I/O pin count and functionality of standard small-outline packages in less than half the printed-circuit-board area. The SN54LVT244A is characterized for operation over the full military temperature range of – 55°C to 125°C. The SN74LVT244A is characterized for operation from – 40°C to 85°C. FUNCTION TABLE (each buffer) INPUTS OE A OUTPUT Y L H H L L L H X Z Copyright 1994, Texas Instruments Incorporated UNLESS OTHERWISE NOTED this document contains PRODUCTION DATA information current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 LVT244–5 2–1 SN54LVT244A, SN74LVT244A 3.3-V ABT OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCAS354 – FEBRUARY 1994 logic symbol† 1OE 1A1 1A2 1A3 1A4 1 logic diagram (positive logic) 1OE 2 18 4 16 6 14 8 12 1Y1 1A1 2OE 1Y3 1A2 2A2 2A3 2A4 18 4 16 6 EN 11 9 13 7 15 5 17 3 1Y1 1Y2 1Y4 1A4 2A1 2 1Y2 1A3 19 1 EN 8 14 1Y3 12 1Y4 2Y1 2Y2 2Y3 19 2OE 2Y4 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. 11 9 13 7 15 5 17 3 2Y1 2A1 2A2 2Y2 2Y3 2A3 2A4 2Y4 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)‡ Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 4.6 V Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V Voltage range applied to any output in the high state or power-off state, VO (see Note 1) . . . . – 0.5 V to 7 V Current into any output in the low state, IO: SN54LVT244A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA SN74LVT244A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA Current into any output in the high state, IO (see Note 2): SN54LVT244A . . . . . . . . . . . . . . . . . . . . . . . . 48 mA SN74LVT244A . . . . . . . . . . . . . . . . . . . . . . . . 64 mA Input clamp current, IIK (VI < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 50 mA Output clamp current, IOK (VO < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 50 mA Maximum power dissipation at TA = 55°C (in still air) (see Note 3): DB package . . . . . . . . . . . . . . . . . . . . 0.6 W DW package . . . . . . . . . . . . . . . . . . . 1.6 W PW package . . . . . . . . . . . . . . . . . . . 0.7 W Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C ‡ Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed. 2. This current will only flow when the output is in the high state and VO > VCC. 3. The maximum package power dissipation is calculated using a junction temperature of 150°C and a board trace length of 750 mils. For more information, refer to the Package Thermal Considerations application note. 2–2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 LVT244–5 SN54LVT244A, SN74LVT244A 3.3-V ABT OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCAS354 – FEBRUARY 1994 recommended operating conditions (see Note 4) SN54LVT244A SN74LVT244A MIN MAX MIN MAX 2.7 3.6 2.7 3.6 UNIT VCC VIH Supply voltage VIL VI Low-level input voltage 0.8 0.8 Input voltage 5.5 5.5 V IOH IOL High-level output current – 24 – 32 mA 48 64 mA ∆t /∆v Input transition rise or fall rate 10 10 ns / V 85 °C High-level input voltage 2 Low-level output current Outputs enabled TA Operating free-air temperature NOTE 4: Unused or floating control inputs must be held high or low. – 55 2 125 – 40 V V V PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 LVT244–5 2–3 SN54LVT244A, SN74LVT244A 3.3-V ABT OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCAS354 – FEBRUARY 1994 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VOH SN54LVT244A TYP† MAX TEST CONDITIONS VCC = 2.7 V, VCC = MIN to MAX‡, II = –18 mA IOH = –100 µA VCC = 2.7 V, VCC = 3 V, IOH = – 8 mA IOH = – 24 mA VCC = 3 V, VCC = 2.7 V, IOH = – 32 mA IOL = 100 µA VCC = 2.7 V, VCC = 3 V, MIN SN74LVT244A TYP† MAX MIN –1.2 VCC – 0.2 2.4 –1.2 VCC – 0.2 2.4 2 0.2 IOL = 24 mA IOL = 16 mA 0.5 0.5 0.4 0.4 VCC = 3 V, VCC = 3 V, IOL = 32 mA IOL = 48 mA 0.5 0.5 VCC = 3 V, VCC = 0 or MAX‡, IOL = 64 mA VI = 5.5 V VCC = 3.6 V, VCC = 3.6 V, VI = VCC or GND VI = VCC VCC = 3.6 V, VCC = 0, VI = 0 VI or VO = 0 to 4.5 V II(hold) I(h ld) VCC = 3 V VI = 0.8 V VI = 2 V IOZH IOZL VCC = 3.6 V, VCC = 3.6 V, VO = 3 V VO = 0.5 V ICC VCC = 3.6 V, VI = VCC or GND IO = 0, II Ioff V 0.55 0.55 Control pins Data pins 10 10 ±1 ±1 1 1 –5 A inputs 75 75 –75 –75 5 5 µA –5 –5 µA 0.12 0.5 0.12 0.19 Outputs low 8.6 14 8.6 12 0.12 0.5 0.12 0.19 VCC = 3 V to 3.6 V, One input at VCC – 0.6 V, Other inputs at VCC or GND Ci VI = 3 V or 0 VO = 3 V or 0 µA µA Outputs high Outputs disabled µA –5 ± 100 ∆ICC§ Co V V 2 0.2 VOL UNIT 0.3 0.2 mA mA 4 4 pF 8 8 pF † All typical values are at VCC = 3.3 V, TA = 25°C. ‡ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. § This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND. PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. 2–4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 LVT244–5 SN54LVT244A, SN74LVT244A 3.3-V ABT OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCAS354 – FEBRUARY 1994 switching characteristics over recommended operating free-air temperature range, CL = 50 pF (unless otherwise noted) (see Note 5) SN54LVT244A PARAMETER FROM (INPUT) TO (OUTPUT) tPLH tPHL A Y tPZH tPZL OE Y tPHZ tPLZ OE Y VCC = 3.3 V ± 0.3 V MIN MAX 0.5 0.5 SN74LVT244A VCC = 2.7 V MIN VCC = 3.3 V ± 0.3 V VCC = 2.7 V MAX MIN TYP MAX MIN 4.7 5.2 1 2.5 4.1 5 4.4 5.4 1 2.5 4.1 5.2 0.8 5.4 6.5 1 2.7 5.2 6.3 0.8 5.4 7.6 1.1 3.1 5.2 6.7 1.5 6.2 6.9 1.9 3.9 5.6 6.3 1.2 5.5 6 1.8 3.2 5.1 5.6 UNIT MAX ns ns ns NOTE 5: Load circuit and voltage waveforms are shown in Section 1. PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 LVT244–5 2–5 SN54LVT244A, SN74LVT244A 3.3-V ABT OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCAS354 – FEBRUARY 1994 2–6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 LVT244–5 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. 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INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER’S RISK. In order to minimize risks associated with the customer’s applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. TI’s publication of information regarding any third party’s products or services does not constitute TI’s approval, warranty or endorsement thereof. Copyright 1998, Texas Instruments Incorporated