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Details, datasheet, quote on part number:SN74AC574PWLE
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Datasheet text preview:
SN54AC574, SN74AC574 OCTAL D TYPE EDGE TRIGGERED FLIP FLOPS WITH 3 STATE OUTPUTS
SCAS541E - OCTOBER 1995 - REVISED OCTOBER 2003
D D D D
2-V to 6-V VCC Operation Inputs Accept Voltages to 6 V Max tpd of 8.5 ns at 5 V 3-State Outputs Drive Bus Lines Directly
SN54AC574 . . . J OR W PACKAGE SN74AC574 . . . DB, DW, N, NS, OR PW PACKAGE (TOP VIEW)
description/ordering information
These 8-bit flip-flops feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. The devices are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. The eight flip-flops of the AC574 devices are D-type edge-triggered flip-flops. On the positive transition of the clock (CLK) input, the Q outputs are set to the logic levels set up at the data (D) inputs. 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 the increased drive provide the capability to drive bus lines in a bus-organized system without need for interface or pullup components. OE does not affect internal operations of the flip-flop. Old data can be retained or new data can be entered while the outputs are in the high-impedance state. ORDERING INFORMATION
TA PDIP - N SOIC - DW -40°C to 85 C 85°C SOP - NS SSOP - DB TSSOP - PW CDIP - J -55°C to 125 C 125°C CFP - W LCCC - FK PACKAGE Tube Tube Tape and reel Tape and reel Tape and reel Tube Tape and reel Tube Tube Tube
OE 1D 2D 3D 4D 5D 6D 7D 8D GND
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
VCC 1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q CLK
SN54AC574 . . . FK PACKAGE (TOP VIEW)
2D 1D OE VCC
3D 4D 5D 6D 7D
4 5 6 7 8
3 2 1 20 19 18 17 16 15 14 9 10 11 12 13
1Q 2Q 3Q 4Q 5Q 6Q
ORDERABLE PART NUMBER SN74AC574N SN74AC574DW SN74AC574DWR SN74AC574NSR SN74AC574DBR SN74AC574PW SN74AC574PWR SNJ54AC574J SNJ54AC574W SNJ54AC574FK
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. 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.
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.
On products compliant to MIL PRF 38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters.
Copyright 2003, Texas Instruments Incorporated
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
8D GND CLK 8Q 7Q
TOP-SIDE MARKING SN74AC574N AC574 AC574 AC574 AC574 SNJ54AC574J SNJ54AC574W SNJ54AC574FK
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SCAS541E - OCTOBER 1995 - REVISED OCTOBER 2003
SN54AC574, SN74AC574 OCTAL D TYPE EDGE TRIGGERED FLIP FLOPS WITH 3 STATE OUTPUTS
description/ordering information (continued)
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.
FUNCTION TABLE (each flip-flop) INPUTS OE L L L H CLK H or L X D H L X X OUTPUT Q H L Q0 Z
logic diagram (positive logic)
OE CLK 1 11 C1 1D 2 1D
19
1Q
To Seven Other Channels
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 V to 7 V Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 V to VCC + 0.5 V Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 V to VCC + 0.5 V Input clamp current, IIK (VI VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Output clamp current, IOK (VO VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±200 mA Package thermal impedance, JA (see Note 2): DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70°C/W DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69°C/W NS package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60°C/W PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83°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 51-7.
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POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN54AC574, SN74AC574 OCTAL D TYPE EDGE TRIGGERED FLIP FLOPS WITH 3 STATE OUTPUTS
SCAS541E - OCTOBER 1995 - REVISED OCTOBER 2003
recommended operating conditions (see Note 3)
SN54AC574 MIN VCC VIH Supply voltage VCC = 3 V VCC = 4.5 V VCC = 5.5 V VCC = 3 V VIL VI VO IOH Low-level input voltage Input voltage Output voltage VCC = 3 V VCC = 4.5 V VCC = 5.5 V VCC = 3 V IOL t/v Low-level output current Input transition rise or fall rate VCC = 4.5 V VCC = 5.5 V VCC = 4.5V VCC = 5.5 V 0 0 2 2.1 3.15 3.85 0.9 1.35 1.65 VCC VCC -12 -24 -24 12 24 24 8 0 0 MAX 6 SN74AC574 MIN 2 2.1 3.15 3.85 0.9 1.35 1.65 VCC VCC -12 -24 -24 12 24 24 8 ns/V mA mA V V V V MAX 6 UNIT V
High-level input voltage
High-level output current
TA Operating free-air temperature -55 125 -40 85 °C NOTE 3: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS VCC 3V IOH = -50 µA VOH IOH = -12 mA IOH = -24 mA 4.5 V 5.5 V 3V 4.5 V 5.5 V 3V IOL = 50 µA VOL IOL = 12 mA IOL = 24 mA II IOZ ICC Ci VI = VCC or GND VO = VCC or GND VI = VCC or GND, VI = VCC or GND IO = 0 4.5 V 5.5 V 3V 4.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5V 4.5 MIN 2.9 4.4 5.4 2.56 3.94 4.94 0.1 0.1 0.1 0.36 0.36 0.36 ±0.1 ±0.5 4 TA = 25°C TYP MAX SN54AC574 MIN 2.9 4.4 5.4 2.4 3.7 4.7 0.1 0.1 0.1 0.5 0.5 0.5 ±1 ±5 80 MAX SN74AC574 MIN 2.9 4.4 5.4 2.46 3.76 4.76 0.1 0.1 0.1 0.44 0.44 0.44 ±1 ±2.5 40 µA µA µA pF V V MAX UNIT
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
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