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Details, datasheet, quote on part number:SN74ALS112ANSR
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Datasheet text preview:
SN54ALS112A, SN74ALS112A DUAL J-K NEGATIVE-EDGE-TRIGGERED FLIP-FLOPS WITH CLEAR AND PRESET
SDAS199A APRIL 1982 REVISED DECEMBER 1994
· ·
Fully Buffered to Offer Maximum Isolation From External Disturbance Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs
TYPICAL MAXIMUM CLOCK FREQUENCY (MHz) 50 TYPICAL POWER DISSIPATION PER FLIP-FLOP (mW) 6
SN54ALS112A . . . J PACKAGE SN74ALS112A . . . D OR N PACKAGE (TOP VIEW)
TYPE ALS112A
1CLK 1K 1J 1PRE 1Q 1Q 2Q GND
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
VC C 1CLR 2CLR 2CLK 2K 2J 2PRE 2Q
description
These devices contain two independent J-K negative-edge-triggered flip-flops. A low level at the preset (PRE) or clear (CLR) inputs sets or resets the outputs, regardless of the levels of the other inputs. When PRE and CLR are inactive (high), data at the J and K inputs meeting the setup-time requirements is transferred to the outputs on the negative-going edge of the clock pulse (CLK). Clock triggering occurs at a voltage level and is not directly related to the fall time of the clock pulse. Following the hold-time interval, data at the J and K inputs may be changed without affecting the levels at the outputs. These versatile flip-flops can perform as toggle flip-flops by tying J and K high.
SN54ALS112A . . . FK PACKAGE (TOP VIEW)
1J 1PRE NC 1Q 1Q
3 4 5 6 7 8
2 1 20 19 18 17 16 15
1CLR 2CLR 2CLK NC 2K 2J
NC No internal connection
The SN54ALS112A is characterized for operation over the full military temperature range of 55°C to 125°C. The SN74ALS112A is characterized for operation from 0°C to 70°C.
FUNCTION TABLE (each flip-flop) INPUTS PRE L H L H H H H CLR H L L H H H H CLK X X X J X X X L H L H K X X X L L H H OUTPUTS Q H L H Q0 H L Toggle Q L H H Q0 L H
H H H X X Q0 Q0 The output levels in this configuration may not meet the minimum levels for VOH. Furthermore, this configuration is nonstable; that is, it does not persist when either PRE or CLR returns to its inactive (high) level.
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 © 1994, Texas Instruments Incorporated
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
2Q GND NC 2Q 2PRE
1K 1CLK NC VCC
14 9 10 11 12 13
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SN54ALS112A, SN74ALS112A DUAL J-K NEGATIVE-EDGE-TRIGGERED FLIP-FLOPS WITH CLEAR AND PRESET
SDAS199A APRIL 1982 REVISED DECEMBER 1994
logic symbol
1PRE 1J 1CLK 1K 1CLR 2PRE 2J 2CLK 2K 2CLR 4 3 1 2 15 10 11 13 12 14 7 2Q 9 2Q S 5 1J C1 1K R 6 1Q 1Q
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the D, J, and N packages.
logic diagram (positive logic)
Q PRE K CLK
Q CLR J
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Operating free-air temperature range, TA: SN54ALS112A . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55°C to 125°C SN74ALS112A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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.
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POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN54ALS112A, SN74ALS112A DUAL J-K NEGATIVE-EDGE-TRIGGERED FLIP-FLOPS WITH CLEAR AND PRESET
SDAS199A APRIL 1982 REVISED DECEMBER 1994
recommended operating conditions
SN54ALS112A MIN VCC VIH VIL IOH IOL fclock tw Supply voltage High-level input voltage Low-level input voltage High-level output current Low-level output current Clock frequency PRE or CLR low Pulse duration CLK high CLK low tsu th TA Setup time before CLK time before CLK Hold time after CLK Operating free-air temperature Data PRE or CLR inactive Data 0 15 20 20 25 22 0 55 125 4.5 2 0.7 0.4 4 25 0 10 16.5 16.5 22 20 0 0 70 ns ns °C ns NOM 5 MAX 5.5 SN74ALS112A MIN 4.5 2 0.8 0.4 8 30 NOM 5 MAX 5.5 UNIT V V V mA mA MHz
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER VIK VOH VOL II IIH IIL J, K, or CLK PRE or CLR J, K, or CLK PRE or CLR J, K, or CLK PRE or CLR TEST CONDITIONS CONDITIONS VCC = 4.5 V, VCC = 4.5 V to 5.5 V, VCC = 4 5 V 4.5 VCC = 5 5 V 5.5 V, VCC = 5 5 V 5.5 V, VCC = 5 5 V 5.5 V, II = 18 mA IOH = 0.4 mA IOL = 4 mA IOL = 8 mA VI = 7 V VI = 2 7 V 2.7 VI = 0 4 V 0.4 SN54ALS112A MIN TYP MAX 1.5 VCC 2 0.25 0.4 0.1 0.2 20 40 0.2 0.4 VCC 2 0.25 0.35 0.4 0.5 0.1 0.2 20 40 0.2 0.4 SN74ALS112A MIN TYP MAX 1.5 UNIT V V V mA µA mA
IO VCC = 5.5 V, VO = 2.25 V 20 112 30 112 mA ICC VCC = 5.5 V, See Note 1 2.5 4.5 2.5 4.5 mA 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. NOTE 1: ICC is measured with J, K, CLK, and PRE grounded, then with J, K, CLK, and CLR grounded.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
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