SN54AS821, SN54AS822, SN74AS821, SN74AS822 10-BIT BUS INTERFACE FLIP-FLOPS WITH 3-STATE OUTPUTS SDAS230 – D2825, DECEMBER 1983 – REVISED JANUARY 1986 • • • • • • • SN54AS821 . . . JT PACKAGE SN74AS821 . . . DW OR NT PACKAGE (TOP VIEW) Functionally Equivalent to AMD’s AM29821 and AM29822 Provides Extra Data Width Necessary for Wider Address/Data Paths or Buses With Parity OC 1D 2D 3D 4D 5D 6D 7D 8D 9D 10D GND Outputs Have Undershoot Protection Circuitry Powerup High-impedance State Package Options Include Plastic Small Outline Packages, Both Plastic and Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mil DIPs Buffered Control Inputs to Reduce DC Loading Effects 1 24 2 23 3 22 4 21 5 20 6 19 7 18 8 17 9 16 10 15 11 14 12 13 VCC 1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q 9Q 10Q VCC Dependable Texas Instruments Quality and Reliability description These 10-bit flip-flops feature 3-state outputs designed specifically for driving highly-capacitive or relatively low-impedance loads. They are particularly suitable for implementing wider buffer registers, I/O ports, bidirectional bus drivers with parity, and working registers. The ten flip-flops are edge-triggered D-type flip-flops. On the positive transition of the clock the Q outputs on the ’AS821 will be true, and on the ’AS822 will be complementary to the data input. A buffered output-control input can be used to place the ten outputs in either a normal logic state (high or low levels) or a high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive the bus lines in a bus-organized system without need for interface or pullup components. The output control (OC) does not affect the internal operation of the flip-flops. Old data can be retained or new data can be entered while the outputs are in the high-impedance state. The SN54AS’ family is characterized for operation over the full military temperature range of – 55°C to 125°C. The SN74AS’ family is characterized for operation from 0°C to 70°C. 3 2 1 28 27 26 25 6 24 7 23 8 22 9 21 10 20 11 19 12 13 14 15 16 17 18 3Q 4Q 5Q NC 6Q 7Q 8Q 1 24 2 23 3 22 4 21 5 20 6 19 7 8 18 17 9 16 10 15 11 14 12 13 VCC 1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q 9Q 10Q CLK 3D 4D 5D NC 6D 7D 8D 4 5 3 2 1 28 27 26 25 6 24 7 23 8 22 9 21 10 20 11 19 12 13 14 15 16 17 18 3Q 4Q 5Q NC 6Q 7Q 8Q 9D 10D GND NC CLK 10Q 9Q 4 5 9D 10D GND NC CLK 10Q 9Q 3D 4D 5D NC 6D 7D 8D OC 1D 2D 3D 4D 5D 6D 7D 8D 9D 10D GND SN54AS822 . . . FK PACKAGE SN74AS822 . . . FN PACKAGE (TOP VIEW) 2D 1D OC NC VCC 1Q 2Q SN54AS822 . . . JT PACKAGE SN74AS822 . . . DW OR NT PACKAGE (TOP VIEW) 2D 1D OC NC VCC 1Q 2Q SN54AS821 . . . FK PACKAGE SN74AS821 . . . FN PACKAGE (TOP VIEW) NC–No internal connection Copyright 1986, Texas Instruments Incorporated 5BASIC PRODUCTION DATA information is 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 1 SN54AS821, SN74AS821 10-BIT BUS INTERFACE FLIP-FLOPS WITH 3-STATE OUTPUTS SDAS230 – D2825, DECEMBER 1983 – REVISED JANUARY 1986 ’AS821 FUNCTION TABLE (each flip-flop) ’AS821 logic diagram (positive logic) OUTPUT INPUTS OC CLK D Q L ↑ H H L ↑ L L L L X Q0 H X X Z OC CLK 2D 1D 2D 3D 4D 5D 6D 7D 8D 9D 10D 2 3 EN C1 1D 23 22 21 20 19 18 17 16 15 14 3D 1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q 9Q 10Q 4D 5D † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. 6D 7D 8D 9D 10D Pin numbers shown are for DW, JT, and NT packages. 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 19 5Q 18 6Q 17 7Q 16 8Q 15 9Q 1D C1 11 4Q 1D C1 10 20 1D C1 9 3Q 1D C1 8 21 1D C1 7 2Q 1D C1 6 22 1D C1 5 1Q 1D C1 4 23 1D C1 ’AS821 logic symbol† 2 3 4 5 6 7 8 9 10 11 13 C1 1D 1 OC 13 CLK 1 1D 14 10Q SN54AS822, SN74AS822 10-BIT BUS INTERFACE FLIP-FLOPS WITH 3-STATE OUTPUTS SDAS230 – D2825, DECEMBER 1983 – REVISED JANUARY 1986 ’AS822 FUNCTION TABLE (each flip-flop) ’AS822 logic diagram positive logic OUTPUT INPUTS OC CLK D Q L ↑ H H L ↑ L L L L X Q0 H X X Z OC CLK 1 13 C1 1D 2 ’AS822 logic symbol† 1 OC 13 CLK 1D 2D 3D 4D 5D 6D 7D 8D 9D 10D 2 3 4 5 6 7 8 9 10 11 C1 2D 3 EN C1 1D 1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q 9Q 10Q 3D 4 4D 5D † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. 6D 7D 8D 9D 10D 19 5Q 18 6Q 17 7Q 16 8Q 15 9Q 1D C1 11 4Q 1D C1 10 20 1D C1 9 3Q 1D C1 8 21 1D C1 7 2Q 1D C1 6 22 1D C1 5 1Q 1D C1 23 22 21 20 19 18 17 16 15 14 23 1D 14 10Q 1D Pin numbers shown are for DW, JT, and NT packages. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 SN54AS821, SN54AS822, SN74AS821, SN74AS822 10-BIT BUS INTERFACE FLIP-FLOPS WITH 3-STATE OUTPUTS SDAS230 – D2825, DECEMBER 1983 – REVISED JANUARY 1986 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Voltage applied to a disabled 3-state output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Operating free-air temperature range: SN54AS821, SN54AS822 . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C SN74AS821, SN74AS822 . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C recommended operating conditions SN54AS821 SN74AS821 SN54AS822 SN74AS822 UNIT MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 VCC VIH Supply voltage VIL IOH Low-level input voltage IOL tw Low-level output current Pulse duration, CLK high or low 9 8 ns tsu th Setup time, data before CLK↑ 7 6 ns Hold time, data after CLK↑ 0 0 TA Operating free-air temperature High-level input voltage 2 2 High-level output current V 0.8 0.8 V – 24 – 24 mA 48 mA 32 –55 V 125 ns 0 70 °C electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) SN54AS821 PARAMETER VIK TEST CONDITIONS VCC = 4.5 V, VCC = 4.5 V to 5.5 V, II = – 18 mA IOH = – 2 mA VCC = 4.5 V, VCC = 4.5 V, IOH = – 15 mA IOH = – 24 mA VOL VCC = 4.5 V, VCC = 4.5 V, IOL = 32 mA IOL = 48 mA IOZH IOZL VCC = 5.5 V, VCC = 5.5 V, VO = 2. 7 V VO = 0.4 V II IIH VCC = 5.5 V, VCC = 5.5 V, VI = 7 V VI = 2.7 V IIL IO‡ VCC = 5.5 V, VCC = 5.5 V, VI = 0 .4 V VO= 2.25 V VOH ’AS821 ICC VCC = 5 5.5 5V ’AS822 SN74AS821 SN54AS822 MIN TYP‡ MAX SN74AS822 TYP‡ MAX – 1.2 VCC – 2 2.4 – 1.2 VCC – 2 2.4 3.2 2 UNIT MIN 3.2 V V 2 0.25 0.5 0.35 – 30 0.5 V µA 50 50 – 50 – 50 µA 0.1 0.1 mA 20 20 µA – 0.5 – 0.5 mA – 112 mA – 112 – 30 Outputs high 55 88 55 88 Outputs low 68 109 68 109 Outputs disabled 70 113 70 113 Outputs high 55 88 55 88 Outputs low 68 109 68 109 Outputs disabled 70 113 70 mA 113 † All typical values are at VCC = 5 V, TA = 25°C. ‡ The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS. 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN54AS821, SN54AS822, SN74AS821, SN74AS822 10-BIT BUS INTERFACE FLIP-FLOPS WITH 3-STATE OUTPUTS SDAS230 – D2825, DECEMBER 1983 – REVISED JANUARY 1986 switching characteristics (see Note 1) VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, PARAMETER FROM TO (INPUT) (OUTPUT) tPLH tPHL CLK Any Q tPZH tPZL OC Any Q tPHZ tPZL OC Any Q R2 = 500 Ω, TA = MIN to MAX† SN54AS821 SN74AS821 SN54AS822 SN74AS822 MIN MAX MIN 3.5 9 3.5 7.5 3.5 11.5 3.5 10.5 4 12 4 11 4 13 4 12 2 10 2 8 2 10 2 8 UNIT MAX ns ns ns † For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. NOTE 1: Load circuit and voltage waveforms are shown in Section 1. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 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. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. 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