Renesas HD74AC182 User manual

Rev.2.00, Jul.16.2004, page 1 of 6
HD74AC182
Carry Lookahead Generator REJ03D0258–0200Z
(Previous ADE-205-378 (Z))
Rev.2.00
Jul.16.2004
Description
The HD74AC182 is a high-speed carry lookahead generator. It is generally used with the HD74AC181 or HD74AC381
4-bit arithmetic logic unit to provide high-speed lookahead over word lengths of more than four bits.
Features
•Outputs Source/Sink 24 mA
•Ordering Information
Part Name Package Type Package Code Package Abbreviation Taping Abbreviation (Quantity)
HD74AC182FPEL SOP-16 pin (JEITA) FP-16DAV FP EL (2,000 pcs/reel)
HD74AC182RPEL SOP-16 pin (JEDEC) FP-16DNV RP EL (2,500 pcs/reel)
Notes: 1. Please consult the sales office for the above package availability.
2. The packages with lead-free pins are distinguished from the conventional products by adding V at the end of
the package code.
Pin Arrangement
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
G
1
P 1
G 0
P 0
G 3
P
P
3
GND
V
CC
P 2
G 2
C n
C n+X
C n+y
G
C
n+z
(Top view)

HD74AC182
Rev.2.00, Jul.16.2004, page 2 of 6
Logic Symbol
C n
G
P
P
0
C n+x C n+y C n+z
G 0 P 1 G 1
P 2 G 2
P 3 G 3
Pin Names
Cn Carry Input
G0, G2Carry Generate Inputs (Active Low)
G1Carry Generate Input (Active Low)
G3Carry Generate Input (Active Low)
P0, P1Carry Propagate Inputs (Active Low)
P2Carry Propagate Input (Active Low)
P3Carry Propagate Input (Active Low)
Cn + x to Cn + z Carry Outputs
GCarry Generate Output (Active Low)
PCarry Propagate Output (Active Low)
Logic Diagram
Cn
Cn+x Cn+y Cn+z
G0P0G1
GP
P1G2P2G3P3
Please note that this diagram is provided only for the understanding of logic operations and should not be
used to estimate propagation delays.
Functional Description
The HD74AC182/HD74ACT182 carry lookahead generator accepts up to four pairs of Active Low Carry Propagate (P0
to P3) and Carry Generate (G0to G3) signals and an Active High Carry input (Cn) and provides anticipated Active High
carries (Cn + x, Cn + y , Cn + z) across four groups of binary adders. The HD74AC182/HD74ACT182 also has Active Low
Carry Propagate (P) and Carry Generate (G) outputs which may be used for further level of lookahead. The logic
equations provided at the outputs are:

HD74AC182
Rev.2.00, Jul.16.2004, page 3 of 6
Cn + x = G0+ P0Cn
Cn + y = G1+ P1G0+ P1P0Cn
Cn + z = G2+ P2G1+ P2P1G0+ P2P1P0Cn
G= G3+ P3G2+ P3P2G1+ P3P2P1G0
P= P3P2P1P0
Also, the HD74AC182/HD74ACT182 can be used with binary ALUs in an active Low or active High input operand
mode. The connections (Figure a) to and from the ALU to the carry lookahead generator are identical in both cases.
Carries are rippled between lookahead blocks. The critical speed path follows the circled numbers. There are several
possible arrangements for the carry interconnects, but all achieve about the same speed. A 28-bit ALU is formed by
dropping the last HD74AC182/HD74ACT182.
Truth Table
Inputs Outputs
CnG
GG
G0P
PP
P0G
GG
G1P
PP
P1G
GG
G2P
PP
P2G
GG
G3P
PP
P3Cn + x Cn + y Cn + z G
GG
GP
PP
P
XHH L
LHX L
XLX H
HXL H
XXXHH L
XHHHX L
LHXHX L
XXXLX H
XLXXL H
HXLXL H
XXXXXHH L
XXXHHHX L
XHHHXHX L
LHXHXHX L
XXXXXLX H
XXXLXXL H
XLXXLXL H
HXLXLXL H
X XXXXHH H
X XXHHHX H
XHHHXHX H
HHXHXHX H
X XXXXLX L
XXXLXXL L
XLXXLXL L
LXLXLXL L
HXXX H
XHXX H
XXHX H
XXXH H
LLLL L
H : High Voltage Level
L : Low Voltage Level
X : Immaterial

HD74AC182
Rev.2.00, Jul.16.2004, page 4 of 6
Absolute Maximum Ratings
Item Symbol Ratings Unit Condition
Supply voltage VCC –0.5 to 7 V
–20 mA VI= –0.5VDC input diode current IIK 20 mA VI= Vcc+0.5V
DC input voltage VI–0.5 to Vcc+0.5 V
–50 mA VO= –0.5VDC output diode current IOK 50 mA VO= Vcc+0.5V
DC output voltage VO–0.5 to Vcc+0.5 V
DC output source or sink current IO±50 mA
DC VCC or ground current per output pin ICC, IGND ±50 mA
Storage temperature Tstg –65 to +150 °C
Recommended Operating Conditions
Item Symbol Ratings Unit Condition
Supply voltage VCC 2 to 6 V
Input and output voltage VI, VO0 to VCC V
Operating temperature Ta –40 to +85 °CVCC = 3.0V
VCC = 4.5 V
Input rise and fall time
(except Schmitt inputs)
VIN 30% to 70% VCC
tr, tf 8 ns/V
VCC = 5.5 V
DC Characteristics
Ta = 25°
°°
°C Ta = –40 to
+85°
°°
°C
Item Sym-
bol Vcc (V) min. typ. max. min. max.
Unit Condition
3.0 2.1 1.5 — 2.1 —
4.5 3.15 2.25 — 3.15 —
VIH
5.5 3.85 2.75 — 3.85 —
VOUT = 0.1 V or VCC –0.1 V
3.0 — 1.50 0.9 — 0.9
4.5 — 2.25 1.35 — 1.35
Input Voltage
VIL
5.5 — 2.75 1.65 — 1.65
V
VOUT = 0.1 V or VCC –0.1 V
3.0 2.9 2.99 — 2.9 —
4.5 4.4 4.49 — 4.4 —
5.5 5.4 5.49 — 5.4 —
VIN = VIL or VIH
IOUT = –50 µA
3.0 2.58 — — 2.48 — IOH = –12 mA
4.5 3.94 — — 3.80 — IOH = –24 mA
VOH
5.5 4.94 — — 4.80 —
VIN = VIL or VIH
IOH = –24 mA
3.0 — 0.002 0.1 — 0.1
4.5 — 0.001 0.1 — 0.1
5.5 — 0.001 0.1 — 0.1
VIN = VIL or VIH
IOUT = 50 µA
3.0 — — 0.32 — 0.37 IOL = 12 mA
4.5 — — 0.32 — 0.37 IOL = 24 mA
Output voltage
VOL
5.5 — — 0.32 — 0.37
V
VIN = VIL or VIH
IOL = 24 mA
Input leakage
current IIN 5.5 — — ±0.1 — ±1.0 µAV
IN = VCC or GND
IOLD 5.5———86—mAV
OLD = 1.1 V
Dynamic output
current*IOHD 5.5 — — — –75 — mA VOHD = 3.85 V
Quiescent supply
current ICC 5.5 — — 8.0 — 80 µAV
IN = VCC or ground
*Maximum test duration 2.0 ms, one output loaded at a time.

HD74AC182
Rev.2.00, Jul.16.2004, page 5 of 6
AC Characteristics
Ta = +25°C
CL = 50 pF Ta = –40°C to +85°C
CL= 50 pF
Item Symbol VCC (V)*1Min Typ Max Min Max Unit
Propagation delay tPLH 3.3 1.0 8.0 10.5 1.0 11.5 ns
Pnto P 5.0 1.0 5.5 8.0 1.0 9.0
Propagation delay tPHL 3.3 1.0 8.0 10.5 1.0 11.5 ns
Pnto P 5.0 1.0 5.5 8.0 1.0 9.0
Propagation delay tPLH 3.3 1.0 9.5 12.0 1.0 13.0 ns
Cnto Cn + x, y, z 5.0 1.0 7.5 10.0 1.0 11.0
Propagation delay tPHL 3.3 1.0 9.0 12.0 1.0 13.0 ns
Cnto Cn + x, y, z 5.0 1.0 7.0 10.0 1.0 11.0
Propagation delay tPLH 3.3 1.0 10.5 13.0 1.0 14.0 ns
Pnor Gnto Cn + x, y, z 5.0 1.0 8.0 10.5 1.0 11.5
Propagation delay tPHL 3.3 1.0 11.5 14.0 1.0 15.5 ns
Pnor Gnto Cn + x, y, z 5.0 1.0 9.0 11.5 1.0 12.5
Note: 1. Voltage Range 3.3 is 3.3 V ± 0.3 V
Voltage Range 5.0 is 5.0 V ± 0.5 V
Capacitance
Item Symbol Typ Unit Condition
Input capacitance CIN 4.5 pF VCC = 5.5 V
Power dissipation capacitance CPD 50.0 pF VCC = 5.0 V

HD74AC182
Rev.2.00, Jul.16.2004, page 6 of 6
Package Dimensions
Package Code
JEDEC
JEITA
Mass
(reference value)
FP-16DAV
—
Conforms
0.24 g
*Ni/Pd/Au plating
*0.20 ± 0.05
*0.40 ± 0.06
0.12
0.15
M
2.20 Max
5.5
10.06
0.80 Max
16 9
18
10.5 Max
+ 0.20
–0.30
7.80
0.70 ± 0.20
0˚– 8˚
0.10 ± 0.10
1.15
1.27
As of January, 2003
Unit: mm
Package Code
JEDEC
JEITA
Mass
(reference value)
FP-16DNV
Conforms
Conforms
0.15 g
*Ni/Pd/Au plating
1.27
16 9
18
0.15
0.25
M
1.75 Max 3.95
*0.20 ± 0.05
9.9
0˚–8˚
10.3 Max
+ 0.10
–0.30
6.10
+ 0.67
–0.20
0.60
+ 0.11 –0.04
0.14
*0.40 ± 0.06
0.635 Max
1.08
As of January, 2003
Unit: mm

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