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Details, datasheet, quote on part number:SN74ALS374ADW
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Datasheet text preview:
SN54ALS374A, SN54AS374, SN74ALS374A, SN74AS374 OCTAL D-TYPE EDGE-TRIGGERED FLIP-FLOPS WITH 3-STATE OUTPUTS
SDAS167C APRIL 1982 REVISED NOVEMBER 1999
D D D D
D-Type Flip-Flops in a Single Package With 3-State Bus Driving True Outputs Full Parallel Access for Loading Buffered Control Inputs Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) DIPs
SN54ALS374A, SN54AS374 . . . J PACKAGE SN74ALS374A, SN74AS374 . . . DW OR N PACKAGE (TOP VIEW)
description
These octal D-type edge-triggered flip-flops feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. They are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. 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 places 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 without interface or pullup components.
OE 1Q 1D 2D 2Q 3Q 3D 4D 4Q GND
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
VCC 8Q 8D 7D 7Q 6Q 6D 5D 5Q CLK
SN54ALS374A, SN54AS374 . . . FK PACKAGE (TOP VIEW)
2D 2Q 3Q 3D 4D
3 4 5 6 7 8
2 1 20 19 18 17 16 15
OE VCC 8Q 8D 7D 7Q 6Q 6D
OE does not affect 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 SN54ALS374A and SN54AS374 are characterized for operation over the full military temperature range of 55°C to 125°C. The SN74ALS374A and SN74AS374 are characterized for operation from 0°C to 70°C.
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
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.
Copyright © 1999, Texas Instruments Incorporated
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.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
4Q GND CLK 5Q 5D
1D 1Q
14 9 10 11 12 13
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SN54ALS374A, SN54AS374, SN74ALS374A, SN74AS374 OCTAL D-TYPE EDGE-TRIGGERED FLIP-FLOPS WITH 3-STATE OUTPUTS
SDAS167C APRIL 1982 REVISED NOVEMBER 1999
logic symbol
OE CLK 1 11 EN C1 2 5 6 9 12 15 16 19
logic diagram (positive logic)
OE CLK 1 11 C1 2 1Q
1D 2D 3D 4D 5D 6D 7D 8D
3 4 7 8 13 14 17 18
1D
1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q
1D
3
1D
To Seven Other Channels
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 7 V Voltage applied to a disabled 3-state output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 5.5 V Package thermal impedance, JA (see Note 1): DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69°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. NOTE 1: The package thermal impedance is calculated in accordance with JESD 51.
recommended operating conditions
SN54ALS374A MIN VCC VIH VIL IOH IOL TA Supply voltage High-level input voltage Low-level input voltage High-level output current Low-level output current Operating free-air temperature 55 4.5 2 0.7 1 12 125 0 NOM 5 MAX 5.5 SN74ALS374A MIN 4.5 2 0.8 2.6 24 70 NOM 5 MAX 5.5 UNIT V V V mA mA °C
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POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN54ALS374A, SN54AS374, SN74ALS374A, SN74AS374 OCTAL D-TYPE EDGE-TRIGGERED FLIP-FLOPS WITH 3-STATE OUTPUTS
SDAS167C APRIL 1982 REVISED NOVEMBER 1999
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER VIK VOH TEST CONDITIONS CONDITIONS VCC = 4.5 V, VCC = 4.5 V to 5.5 V, VCC = 4 5 V 4.5 VCC = 4 5 V 4.5 VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V II = 18 mA IOH = 0.4 mA IOH = 1 mA IOH = 2.6 mA IOL = 12 mA IOL = 24 mA VO = 2.7 V VO = 0.4 V VI = 7 V VI = 2.7 V VI = 0.4 V VO = 2.25 V Outputs high ICC Outputs low 20 11 19 MIN SN54ALS374A TYP MAX 1.5 VCC2 2.4 VCC2 3.3 2.4 0.25 0.4 20 20 0.1 20 0.2 112 20 28 30 11 19 3.2 0.25 0.35 0.4 0.5 20 20 0.1 20 0.2 112 19 28 mA V µA µA mA µA mA mA V MIN SN74ALS374A TYP MAX 1.5 UNIT V
VOL IOZH IOZL II IIH IIL IO
Outputs disabled 20 31 20 31 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.
timing requirements over recommended operating free-air temperature range (unless otherwise noted)
SN54ALS374A MIN fclock tw tsu th Clock frequency Pulse duration Setup time Hold time CLK high or low Data before CLK Data after CLK 16.5 10 4 MAX 30 14 10 0 SN74ALS374A MIN MAX 35 UNIT MHz ns ns ns
switching characteristics over recommended operating conditions (unless otherwise noted (see Figure 3)
PARAMETER fmax tPLH tPHL tPZH tPZL tPHZ tPLZ FROM (INPUT) TO (OUTPUT) SN54ALS374A MIN 30 CLK 3 Q Q Q 5 3 OE OE 5 1 2 14 17 18 21 11 19 MAX SN74ALS374A MIN 35 3 5 3 5 1 2 12 16 17 18 10 18 MAX UNIT MHz ns ns ns
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
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