SN54HCT574, SN74HCT574 OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH 3-STATE OUTPUTS SCLS177C – MARCH 1984 – REVISED MAY 1997 D D SN54HCT574 . . . J OR W PACKAGE SN74HCT574 . . . DW, N, OR PW PACKAGE (TOP VIEW) Inputs Are TTL-Voltage Compatible High-Current 3-State Noninverting Outputs Drive Bus Lines Directly or up to 15 LSTTL Loads Bus-Structured Pinout Package Options Include Plastic Small-Outline (DW), Thin Shrink Small-Outline (PW), and Ceramic Flat (W) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs OE 1D 2D 3D 4D 5D 6D 7D 8D GND description These octal edge-triggered D-type flip-flops feature 3-state outputs designed specifically for bus driving. They are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 VCC 1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q CLK 2D 1D SN54HCT574 . . . FK PACKAGE (TOP VIEW) The eight flip-flops enter data on the low-to-high transition of the clock (CLK) input. 3D 4D 5D 6D 7D 4 3 2 1 20 19 18 5 17 6 16 7 15 8 14 9 10 11 12 13 2Q 3Q 4Q 5Q 6Q 8D GND CLK 8Q 7Q A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high or low logic levels) or the 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 bus lines without interface or pullup components. OE VCC 1Q D D OE does not affect the internal operations 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 SN54HCT574 is characterized for operation over the full military temperature range of –55°C to 125°C. The SN74HCT574 is characterized for operation from –40°C to 85°C. FUNCTION TABLE (each flip-flop) INPUTS OE CLK D OUTPUT Q L ↑ H H L ↑ L L L H or L X Q0 H X X Z Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Copyright 1997, 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 1 SN54HCT574, SN74HCT574 OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH 3-STATE OUTPUTS SCLS177C – MARCH 1984 – REVISED MAY 1997 logic symbol† OE CLK 1D 2D 3D 4D 5D 6D 7D 8D 1 11 2 EN C1 19 1D 3 18 4 17 5 16 6 15 7 14 8 13 9 12 1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. logic diagram (positive logic) OE CLK 1 11 C1 1D 2 19 1Q 1D To Seven Other Channels absolute maximum ratings over operating free-air temperature range‡ Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V Input clamp current, IIK (VI < 0 or VI > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Output clamp current, IOK (VO < 0 or VO > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±35 mA Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±70 mA Package thermal impedance, θJA (see Note 2): DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67°C/W PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128°C/W Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –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 voltage ratings may be exceeded if the input and output current ratings are observed. 2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace length of zero. 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN54HCT574, SN74HCT574 OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH 3-STATE OUTPUTS SCLS177C – MARCH 1984 – REVISED MAY 1997 recommended operating conditions SN54HCT574 SN74HCT574 MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 UNIT VCC VIH Supply voltage VIL VI Low-level input voltage 0 0.8 0 0.8 V Input voltage 0 0 Output voltage 0 0 VCC VCC V VO tt VCC VCC 0 500 0 500 ns TA Operating free-air temperature –55 125 –40 85 °C High-level input voltage VCC = 4.5 V to 5.5 V VCC = 4.5 V to 5.5 V 2 Input transition (rise and fall) time 2 V V V electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VCC VOH VI = VIH or VIL IOH = –20 µA IOH = –6 mA 45V 4.5 VOL VI = VIH or VIL IOL = 20 µA IOL = 6 mA 45V 4.5 II IOZ VI = VCC or 0 VO = VCC or 0 ICC VI = VCC or 0, IO = 0 One input at 0.5 V or 2.4 V, Other inputs at 0 or VCC 5.5 V ∆ICC† MIN SN54HCT574 MIN MAX SN74HCT574 MIN 4.4 4.499 4.4 4.4 3.98 4.3 3.7 3.84 MAX UNIT V 0.001 0.1 0.1 0.1 0.17 0.26 0.4 0.33 5.5 V ±0.1 ±100 ±1000 ±1000 nA 5.5 V ±0.01 ±0.5 ±10 ±5 µA 8 160 80 µA 1.4 2.4 3 2.9 mA 3 10 10 10 pF 5.5 V 4.5 V to 5.5 V Ci TA = 25°C TYP MAX V † This is the increase in supply current for each input that is at one of the specified TTL voltage levels rather than 0 V or VCC. timing requirements over recommended operating free-air temperature range (unless otherwise noted) VCC fclock l k Clock frequency tw Pulse duration, duration CLK high or low tsu Setup time, time data before CLK↑ th time data after CLK↑ Hold time, TA = 25°C MIN MAX SN54HCT574 SN74HCT574 MIN MAX MIN MAX 4.5 V 0 30 0 20 0 24 5.5 V 0 33 0 22 0 27 4.5 V 16 24 20 5.5 V 14 22 18 4.5 V 20 30 25 5.5 V 17 27 23 4.5 V 5 5 5 5.5 V 5 5 5 UNIT MHz ns ns ns 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 3 SN54HCT574, SN74HCT574 OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH 3-STATE OUTPUTS SCLS177C – MARCH 1984 – REVISED MAY 1997 switching characteristics over recommended operating free-air temperature range, CL = 50 pF (unless otherwise noted) (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) fmax tpd d CLK Any Q ten OE Any Q tdis di OE Any Q tt Any Q VCC MIN TA = 25°C TYP MAX SN54HCT574 MIN MAX SN74HCT574 MIN 4.5 V 30 36 20 24 5.5 V 33 40 22 27 MAX UNIT MHz 4.5 V 30 36 54 45 5.5 V 25 32 48 41 4.5 V 26 30 45 38 5.5 V 23 27 41 34 4.5 V 23 30 45 38 5.5 V 22 27 41 34 4.5 V 10 12 18 15 5.5 V 9 11 16 14 ns ns ns ns switching characteristics over recommended operating free-air temperature range, CL = 150 pF (unless otherwise noted) (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) fmax tpd d CLK Any Q ten OE Any Q tt Any Q VCC MIN TA = 25°C TYP MAX SN54HCT574 MIN MAX SN74HCT574 MIN 4.5 V 30 36 20 24 5.5 V 33 40 22 27 MAX UNIT MHz 4.5 V 40 53 80 66 5.5 V 35 47 71 60 4.5 V 34 47 71 59 5.5 V 29 39 94 78 4.5 V 18 42 63 53 5.5 V 16 38 57 48 ns ns ns operating characteristics, TA = 25°C PARAMETER Cpd TEST CONDITIONS Power dissipation capacitance per flip-flop No load 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. 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYP 93 UNIT pF SN54HCT574, SN74HCT574 OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH 3-STATE OUTPUTS SCLS177C – MARCH 1984 – REVISED MAY 1997 PARAMETER MEASUREMENT INFORMATION VCC S1 Test Point From Output Under Test PARAMETER ten RL tdis CL (see Note A) S2 tPZH RL 1 kΩ tPZL tPHZ 1 kΩ CL S1 S2 50 pF or 150 pF Open Closed Closed Open Open Closed Closed Open Open Open 50 pF tPLZ 50 pF or 150 pF –– tpd or tt LOAD CIRCUIT 3V High-Level Pulse 1.3 V 3V Reference Input 1.3 V 0V 1.3 V tsu 0V tw Data Input 1.3 V 0.3 V 3V Low-Level Pulse 1.3 V 1.3 V Output Control (Low-Level Enabling) 3V 1.3 V 0V tPLH In-Phase Output 1.3 V 10% tPHL 90% 90% tr Out-ofPhase Output tPHL 90% VOH 1.3 V 10% V OL tf 1.3 V 10% tf 3V 1.3 V 0.3 V 0 V tf 3V 1.3 V 1.3 V 0V tPZL Output Waveform 1 (See Note B) tPLZ ≈ VCC 1.3 V 10% VOL tPZH tPLH 1.3 V 10% 2.7 V VOLTAGE WAVEFORMS SETUP AND HOLD AND INPUT RISE AND FALL TIMES VOLTAGE WAVEFORMS PULSE DURATIONS 1.3 V 2.7 V tr 0V Input th 90% VOH VOL tr VOLTAGE WAVEFORMS PROPAGATION DELAY AND OUTPUT RISE AND FALL TIMES Output Waveform 2 (See Note B) 1.3 V 90% VOH ≈0V tPHZ VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES FOR 3-STATE OUTPUTS NOTES: A. CL includes probe and test-fixture capacitance. B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. C. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr = 6 ns, tf = 6 ns. D. For clock inputs, fmax is measured when the input duty cycle is 50%. E. The outputs are measured one at a time with one input transition per measurement. F. tPLZ and tPHZ are the same as tdis. G. tPZL and tPZH are the same as ten. H. tPLH and tPHL are the same as tpd. Figure 1. Load Circuit and Voltage Waveforms 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. 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