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Part: SNJ54F283W
Category:
Logic
-> Arithmetic Functions
-> Adders
Description: ti SN54F283, 4-Bit Binary Full Adders With Fast Carry
Company: Texas Instruments, Inc.
Datasheet: Download SNJ54F283W datasheet File size : 214 kB
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Datasheet text preview:
SN54F283, SN74F283 4-BIT BINARY FULL ADDERS WITH FAST CARRY
SDFS069A D2932, MARCH 1987 REVISED OCTOBER 1993
· · ·
Full-Carry Look-Ahead Across the Four Bits Systems Achieve Partial Look-Ahead Performance With the Economy of Ripple Carry Package Options Include Plastic Small-Outline Packages, Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mil DIPs
SN54F283 . . . J PACKAGE SN74F283 . . . D OR N PACKAGE (TOP VIEW)
description
The F283 is a full adder that performs the addition of two 4-bit binary words. The sum () outputs are provided for each bit and the resultant carry (C4) output is obtained from the fourth bit. The device features full internal look-ahead across all four bits generating the carry term C4 in typically 5.7 ns. This capability provides the system designer with partial look-ahead performance at the economy and reduced package count of a ripple-carry implementation. The adder logic, including the carry, is implemented in its true form. End-around carry can be accomplished without the need for logic or level inversion. The F283 can be used with either all-active-high (positive logic) or all-active-low (negative logic) operands. The SN54F283 is characterized for operation over the full military temperature range of 55°C to 125°C. The SN74F283 is characterized for operation from 0°C to 70°C.
2 B2 A2 1 A1 B1 C0 GND
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
V CC B3 A3 3 A4 B4 4 C4
SN54F283 . . . FK PACKAGE (TOP VIEW)
A2 1 NC A1 B1
4 5 6 7 8
3 2 1 20 19 18 17 16 15 14 9 10 11 12 13
B2 2 NC VCC B3 A3 3 NC A4 B4
NC No internal connection 0 P 4 1 13 3 Q 10 1 2 3 4 CO 9 C4
Copyright © 1993, Texas Instruments Incorporated
logic symbol
5 3 14 12 6 2 15 11 7 3 CI 3 0
A1 A2 A3 A4 B1 B2 B3 B4 C0
0
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.
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.
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C0 GND NC C4 4
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SN54F283, SN74F283 4-BIT BINARY FULL ADDERS WITH FAST CARRY
SDFS069A D2932, MARCH 1987 REVISED OCTOBER 1993
logic diagram (positive logic)
9
C4
B4
11
A4
12 10 4
B3
15
A3
14
13
3
B2
2 1 2
A2
3
B1
6 4
A1 C0
5 7
1
Pin numbers shown are for the D, J, and N packages.
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SN54F283, SN74F283 4-BIT BINARY FULL ADDERS WITH FAST CARRY
SDFS069A D2932, MARCH 1987 REVISED OCTOBER 1993
FUNCTION TABLE OUTPUTS INPUTS A1 A3 L H L H L H L H L H L H L H L H B1 B3 L L H H L L H H L L H H L L H H A2 A4 L L L L H H H H L L L L H H H H B2 B4 L L L L L L L L H H H H H H H H WHEN C0 = L WHEN C2 = L 1 3 L H H L L H H L L H H L L H H L 2 4 L L L H H H H L H H H L L L L H C2 C4 L L L L L L L H L L L H H H H H WHEN C0 = H WHEN C2 = H 1 3 H L L H H L L H H L L H H L L H 2 4 L H H H H L L L H L L L L H H H C2 C4 L L L L L H H H L H H H H H H H
NOTE: Input conditions at A1, B1, A2, B2, and C0 are used to determine outputs 1 and 2 and the value of the internal carry C2. The values at C2, A3, B3, A4, and B4 are then used to determine outputs 3, 4, and C4.
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 (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 V to 7 V Input current range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA to 5 mA Voltage range applied to any output in the high state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to VCC Current into any output in the low state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 mA Operating free-air temperature range: SN54F283 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55°C to 125°C SN74F283 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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. NOTE 1: The input voltage ratings may be exceeded provided the input current ratings are observed.
POST OFFICE BOX 655303
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23
SN54F283, SN74F283 4-BIT BINARY FULL ADDERS WITH FAST CARRY
SDFS069A D2932, MARCH 1987 REVISED OCTOBER 1993
recommended operating conditions
SN54F283 MIN VCC VIH VIL IIK IOH IOL TA Supply voltage High-level input voltage Low-level input voltage Input clamp current High-level output current Low-level output current Operating free-air temperature 55 4.5 2 0.8 18 1 20 125 0 NOM 5 MAX 5.5 SN74F283 MIN 4.5 2 0.8 18 1 20 70 NOM 5 MAX 5.5 UNIT V V V mA mA mA °C
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER VIK VOH VOL II IIH IIL Any A or B C0 VCC = 4.5 V, VCC = 4.5 V VCC = 4.75 V, VCC = 4.5 V VCC = 5.5 V, VCC = 5.5 V, VCC = 5 5 V 5.5 V, TEST CONDITIONS CONDITIONS II = 18 mA IOH = 1 mA IOH = 1 mA IOL = 20 mA VI = 7 V VI = 2.7 V VI = 0 5 V 0.5 MIN SN54F283 TYP MAX 1.2 2.5 3.4 0.3 0.5 0.1 20 1.2 0.6 2.5 2.7 0.3 0.5 0.1 20 1.2 0.6 150 55 3.4 MIN SN74F283 TYP MAX 1.2 UNIT V V V mA µA mA mA mA
IOS VCC = 5.5 V, VO = 0 60 150 60 ICC VCC = 5.5 V, VI = 4.5 V 36 55 36 All typical values are at VCC = 5 V, TA = 25°C. Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second.
switching characteristics (see Note 2)
VCC = 5 V, CL = 50 pF, RL = 500 , TA = 25°C F283 MIN tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL C0 A or B or C0 A or B or C4 C4 2.7 3.2 3.2 2.7 2.7 2.2 2.7 2.2 TYP 6.6 6.6 6.6 6.6 5.3 5 5.3 4.9 MAX 9.5 9.5 9.5 9.5 7.5 7 7.5 7 VCC = 4.5 V to 5.5 V, CL = 50 pF, RL = 500 , TA = MIN to MAX§ SN54F283 MIN 2.7 3.2 3.2 2.7 2.7 2.2 2.7 2.2 MAX 14 14 14 14 10.5 10 10.5 10 SN74F283 MIN 2.7 3.2 3.2 2.7 2.7 2.2 2.7 2.2 MAX 10.5 10.5 10.5 10.5 8.5 8 8.5 8 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. NOTE 2: Load circuits and waveforms are shown in Section 1.
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Copyright © 1998, Texas Instruments Incorporated
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