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Details, datasheet, quote on part number:SN74AS580DW
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Datasheet text preview:
SN54ALS580B, SN74ALS580B, SN74AS580 OCTAL D-TYPE TRANSPARENT LATCHES WITH 3-STATE OUTPUTS
SDAS277 JANUARY 1995
· · · ·
3-State Buffer-Type Outputs Drive Bus Lines Directly Bus-Structured Pinout Inverting-Logic Outputs Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK), Standard Plastic (N) and Ceramic (J) 300-mil DIPs, and Ceramic Flat (W) Packages
SN54ALS580B . . . J OR W PACKAGE SN74ALS580B, SN74AS580 . . . DW OR N PACKAGE (TOP VIEW)
description
These octal D-type transparent latches 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. While the latch-enable (LE) input is high, outputs (Q) respond to the data (D) inputs. When LE is low, the outputs are latched to retain the data that was set up. A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high or low) 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 the increased drive provide the capability to drive bus lines without interface or pullup components.
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
VC C 1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q LE
SN54ALS580B . . . FK PACKAGE (TOP VIEW)
OE VCC
3D 4D 5D 6D 7D
3 4 5 6 7 8
2 1 20 19 18 17 16 15
1Q 2Q 3Q 4Q 5Q 6Q
OE does not affect internal operations of the latches. Old data can be retained or new data can be entered while the outputs are in the high-impedance state. The SN54ALS580B is characterized for operation over the full military temperature range of 55°C to 125°C. The SN74ALS580B and SN74AS580 are characterized for operation from 0°C to 70°C.
FUNCTION TABLE (each latch) INPUTS OE L L L H LE H H L X D H L X X OUTPUT Q L H Q0 Z
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 © 1995, Texas Instruments Incorporated
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
8D GND LE 8Q 7Q
2D 1D
14 9 10 11 12 13
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SN54ALS580B, SN74ALS580B, SN74AS580 OCTAL D-TYPE TRANSPARENT LATCHES WITH 3-STATE OUTPUTS
SDAS277 JANUARY 1995
logic symbol
OE LE 1D 2D 3D 4D 5D 6D 7D 8D 1 11 2 3 4 5 6 7 8 9 EN C1 1D 19 18 17 16 15 14 13 12
logic diagram (positive logic)
OE LE 1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q To Seven Other Channels 1D C1 2 1D 19 1Q 1 11
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, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Voltage applied to a disabled 3-state output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Operating free-air temperature range, TA: SN54ALS580B . . . . . . . . . . . . . . . . . . . . . . . . . . . 55°C to 125°C SN74ALS580B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C 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.
recommended operating conditions
SN54ALS580B MIN VCC VIH VIL IOH IOL tw tsu th TA Supply voltage High-level input voltage Low-level input voltage High-level output current Low-level output current Pulse duration, LE high Setup time, data before LE Hold time, data after LE Operating free-air temperature 15 20 12 55 125 4.5 2 0.7 1 12 15 10 10 0 70 NOM 5 MAX 5.5 SN74ALS580B MIN 4.5 2 0.8 2.6 24 NOM 5 MAX 5.5 UNIT V V V mA mA ns ns ns °C
2
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN54ALS580B, SN74ALS580B, SN74AS580 OCTAL D-TYPE TRANSPARENT LATCHES WITH 3-STATE OUTPUTS
SDAS277 JANUARY 1995
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 10 16 MIN SN54ALS580B TYP MAX 1.2 VCC 2 2.4 VCC 2 3.3 2.4 0.25 0.4 20 20 0.1 20 0.13 112 17 26 30 10 16 3.2 0.25 0.35 0.4 0.5 20 20 0.1 20 0.1 112 17 26 mA V µA µA mA µA mA mA V MIN SN74ALS580B TYP MAX 1.2 UNIT V
VOL IOZH IOZL II IIH IIL IO
Outputs disabled 17 29 17 29 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.
switching characteristics (see Figure 1)
VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 , R2 = 500 , TA = MIN to MAX§ SN54ALS580B MIN tPLH tPHL tPLH tPHL tPZH tPZL tPHZ tPLZ D LE 3 Q Q Q Q 3 8 4 4 OE OE 4 2 3 MAX 26 15 29 22 25 21 12 22 SN74ALS580B MIN 3 3 6 6 3 4 1 1 MAX 18 14 22 21 18 18 10 15 ns ns ns ns
PARAMETER
FROM (INPUT)
TO (OUTPUT)
UNIT
§ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
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