DESCRIPTION | FUNCTIONAL DESCRIPTION | CONNECTION DIAGRAM (20-pin DIP) | FUNCTION SELECT TABLE | TRUTH TABLE | INPUT LOADING / FAN-OUT | DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE | AC CHARACTERISTICS
The 'F382 performs three arithmetic and three logic operations on two 4-bit words, A and B. Two additional Select input codes force the Function outputs LOW or HIGH. An Overflow output is provided for convenience in twos complement arithmetic. A Carry output is provided for ripple expansion. For high-speed expansion using a Carry Lookahead Generator, refer to the 'F381 data sheet. o Performs Six Arithmetic and Logic Functions o Selectable LOW (Clear) and HIGH (Preset) Functions o LOW Input Loading Minimizes Drive Requirements o Carry Output for Ripple Expansion o Overflow Output for Twos Complement Arithmetic
Signals applied to the Select inputs S0-S2 determine the mode of operation, as indicated in the Function Select Table. An extensive listing of input and output levels is shown in the Truth Table. The circuit performs the arithmetic functions for either active HIGH or active LOW operands, with output levels in the same convention. In the Subtract operating modes, it is necessary to force a carry (HIGH for active HIGH operands, LOW for active LOW operands) into the Cn input of the least significant package. Ripple expansion is illustrated in Figure a. The overflow output OVR is the Exclusive-OR of Cn+3 and Cn+4; a HIGH signal on OVR indicates overflow in twos complement operation. Typical delays for Figure a are given in Figure b.
Pin Function Pin Function --- ------------------------ --- ------------------------ 1 A1 A operand input 1 20 Vcc 2 B1 B operand input 1 19 A2 A operand input 2 3 A0 A operand input 0 18 B2 B operand input 2 4 B0 B operand input 0 17 A3 A operand input 3 5 S0 Function Select 0 16 B3 B operand input 3 6 S1 Function Select 1 15 Cn Carry input 7 S2 Function Select 2 14 Cn+4 Carry output 8 F0 Function output 0 13 OVR Overflow output 9 F1 Function output 1 12 F3 Function output 3 10 GND 11 F2 Function output 2
Select ---------- S0 S1 S2 Operation -- -- -- ----------- L L L Clear H L L B Minus A L H L A Minus B H H L A Plus B L L H A xor B H L H A + B L H H AB H H H Preset H = HIGH voltage level; L = LOW voltage level.
Inputs Outputs
------------------ --------------------------
Function S0 S1 S2 Cn An Bn F0 F1 F2 F3 OVR Cn+4
------------ -------- -------- ----------- ----- -----
CLEAR 0 0 0 0 X X 0 0 0 0 1 1
1 X X 0 0 0 0 1 1
B MINUS A 1 0 0 0 0 0 1 1 1 1 0 0
0 0 1 0 0 0 0 0 1
0 1 0 0 0 0 0 0 0
0 1 1 1 1 1 1 0 0
1 0 0 0 0 0 0 0 1
1 0 1 1 1 1 1 0 1
1 1 0 1 0 0 0 0 0
1 1 1 0 0 0 0 0 1
A MINUS B 0 1 0 0 0 0 1 1 1 1 0 0
0 0 1 0 0 0 0 0 0
0 1 0 0 1 1 1 0 1
0 1 1 1 1 1 1 0 0
1 0 0 0 0 0 0 0 1
1 0 1 1 0 0 0 0 0
1 1 0 1 1 1 1 0 1
1 1 1 0 0 0 0 0 1
A PLUS B 1 1 0 0 0 0 0 0 0 0 0 0
0 0 1 1 1 1 1 0 0
0 1 0 1 1 1 1 0 0
0 1 1 0 1 1 1 0 1
1 0 0 1 0 0 0 0 0
1 0 1 0 0 0 0 0 1
1 1 0 0 0 0 0 0 1
1 1 1 1 1 1 1 0 1
A xor B 0 0 1 X 0 0 0 0 0 0 0 0
X 0 1 1 1 1 1 0 0
0 1 0 1 1 1 1 0 0
X 1 1 0 0 0 0 1 1
1 1 0 1 1 1 1 1 1
A + B 1 0 1 X 0 0 0 0 0 0 0 0
X 0 1 1 1 1 1 0 0
X 1 0 1 1 1 1 0 0
0 1 1 1 1 1 1 0 0
1 1 1 1 1 1 1 1 1
AB 0 1 1 X 0 0 0 0 0 0 1 1
X 0 1 0 0 0 0 0 0
X 1 0 0 0 0 0 1 1
0 1 1 1 1 1 1 0 0
1 1 1 1 1 1 1 1 1
PRESET 1 1 1 X 0 0 1 1 1 1 0 0
X 0 1 1 1 1 1 0 0
X 1 0 1 1 1 1 0 0
0 1 1 1 1 1 1 0 0
1 1 1 1 1 1 1 1 1
1 = HIGH voltage level; 0 = LOW voltage level; X = immaterial.
Pin Names Description U.L. HIGH/LOW ---------- ---------------------- ------------- A0 - A3 A Operand Inputs 0.5 / 1.50 B0 - B3 B Operand Inputs 0.5 / 1.50 S0 - S2 Function Select Inputs 0.5 / 0.375 Cn Carry Input 0.5 / 1.875 Cn+4 Carry Output 25 / 12.5 OVR Overflow Output 25 / 12.5 F0 - F3 Function Outputs 25 / 12.5
Symbol Parameter Min Typ Max Units Conditions
------ -------------------- --- --- --- ----- -----------------------
ICC Power Supply Current 54 81 mA Vcc = Max; S0, Cn = HIGH
Other Inputs Gnd
TA = +25 C 74F
Vcc = +5.0V TA/Vcc = Com
Symbol Parameter CL Min Typ Max Min Max Units
------ ----------------------------- ----- --- ---- --- --- ---- -----
tPLH Prop Delay Cn to Fi 50 pF 3.0 8.1 12.0 3.0 13.0 ns
tPHL Prop Delay Cn to Fi 50 pF 2.5 5.7 8.0 2.5 9.0 ns
tPLH Prop Delay Any A or B to 50 pF 4.0 10.4 15.0 4.0 16.0 ns
Any F
tPHL Prop Delay Any A or B to 50 pF 3.5 8.2 11.0 3.5 12.0 ns
Any F
tPLH Prop Delay Si to Fi 50 pF 6.5 11.0 15.0 6.5 16.0 ns
tPHL Prop Delay Si to Fi 50 pF 4.0 8.2 20.5 4.0 21.5 ns
tPLH Prop Delay Ai or Bi to Cn+4 50 pF 3.5 6.0 8.5 3.5 9.5 ns
tPHL Prop Delay Ai or Bi to Cn+4 50 pF 3.5 6.5 9.0 3.5 10.5 ns
tPLH Prop Delay Si to OVR or Cn+4 50 pF 7.0 12.5 16.5 7.0 17.5 ns
tPHL Prop Delay Si to OVR or Cn+4 50 pF 5.0 9.0 12.0 5.0 13.0 ns
tPLH Prop Delay Cn to Cn+4 50 pF 3.5 5.6 8.0 3.5 9.0 ns
tPHL Prop Delay Cn to Cn+4 50 pF 3.5 6.3 9.0 3.5 10.0 ns
tPLH Prop Delay Cn to OVR 50 pF 3.5 8.0 11.0 3.5 12.0 ns
tPHL Prop Delay Cn to OVR 50 pF 4.5 7.1 10.0 4.5 11.0 ns
tPLH Prop Delay Ai or Bi to OVR 50 pF 7.0 11.5 15.5 7.0 16.5 ns
tPHL Prop Delay Ai or Bi to OVR 50 pF 5.5 8.0 10.5 5.5 11.5 ns
Data sheet transcription as plain text
No model for this device yet — only the data sheet transcription above.