MC145828B Datasheet, PDF (1/6 Pages) Motorola, Inc – LOOK-AHEAD CARRY BLOCK

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Look-Ahead Carry Block
The MC14582B is a CMOS look–ahead carry generator capable of
anticipating a carry across four binary adders or groups of adders. The
device is cascadable to perform full look–ahead across n–bit adders. Carry,
generate–carry, and propagate–carry functions are provided as enumerated
in the pin designation table shown below.
• Expandable to any Number of Bits
• All Buffered Outputs
• Low Power Dissipation
• Diode Protection on All Inputs
• Supply Voltage Range = 3.0 Vdc to 18 Vdc
• Capable of Driving Two Low–power TTL Loads or One Low–Power
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{Schottky TTL Load over the Rated Temperature Range}
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{MAXIMUM RATINGS* (Voltages Referenced to VSS)}
Symbol
Parameter
Value
Unit
VDD DC Supply Voltage
– 0.5 to + 18.0
V
Vin, Vout Input or Output Voltage (DC or Transient) – 0.5 to VDD + 0.5 V
Iin, Iout Input or Output Current (DC or Transient),
± 10
mA
per Pin
PD Power Dissipation, per Package†
500
mW
Tstg Storage Temperature
– 65 to + 150
_C
TL
Lead Temperature (8–Second Soldering)
260
_C
* Maximum Ratings are those values beyond which damage to the device may occur.
†Temperature Derating:
Plastic “P and D/DW” Packages: – 7.0 mW/_C From 65_C To 125_C
Ceramic “L” Packages: – 12 mW/_C From 100_C To 125_C
LOGIC EQUATIONS
Cn+x = G0 + (P0  Cn)
Cn+y = G1 + (P1  G0) + (P1  P0  Cn)
Cn+z = G2 + (P2  G1) + (P2  P1 G0) + (P2  P1  P0  Cn)
G = G3 + (P3  G2) + (P3  P2  G1) + (P1  P2  P3  G0)
P = P3  P2  P1  P0
Designation
G0, G1, G2, G3
PIN DESIGNATIONS
Pin No’s
Function
3, 1, 14, 5
Active–Low
Carry–Generate Inputs
P0, P1, P2, P3
4, 2, 15, 6
Active–Low
Carry–Propagate Inputs
Cn
Cn+x, Cn+y
Cn+z
G
13
12, 11, 9
10
Carry Input
Carry Outputs
Active–Low Group
Carry–Generate Output
P
7
Active–Low Group
Carry–Propagate Output
REV 3
1/94
©MMOotoTrOolaR, IOncL. A199C5MOS LOGIC DATA
MC14582B
L SUFFIX
CERAMIC
CASE 620
P SUFFIX
PLASTIC
CASE 648
D SUFFIX
SOIC
CASE 751B
ORDERING INFORMATION
MC14XXXBCP
MC14XXXBCL
MC14XXXBD
Plastic
Ceramic
SOIC
TA = – 55° to 125°C for all packages.
PIN ASSIGNMENT
G1 1
P1 2
16 VDD
15 P2
G0 3
14 G2
P0 4
G3 5
P3 6
P7
13 Cin
12 Cn+x
11 Cn+y
10 G
VSS 8
9 Cn+z
MC14582B
1