Page 1
HD74LS279
Quadruple S-R Latches
Features
• Ordering Information
Part Name Package Type
HD74LS279P DILP-16 pin
HD74LS279FPEL SOP-16 pin (JEITA)
Note: Please consult the sales office for the above package availability.
Pin Arrangement
Package Code
(Previous Code)
PRDP0016AE-B
(DP-16FV)
PRSP0016DH-B
(FP-16DAV)
REJ03D0474-0400
Rev.4.00
May 10, 2006
Package
Abbreviation
P —
FP EL (2,000 pcs/reel)
Taping Abbreviation
(Quantity)
1R
2
1
1S
3
1S
2
4
1Q
5
2R
6
2S
7
2Q
GND
8
(Top view)
161
15
14
13
12
11
10
V
CC
4S
4R
4Q
3S
2
1
3S
3R
9
3Q
Rev.4.00, May 10, 2006, page 1 of 4
Page 2
HD74LS279
Function Table
Inputs Output
S** R Q
H H Q0
L H H
H L L
L L H*
Notes: 1. H; high level, L; low level
2. Q0; The level of Q before the indidicated input conditions were established.
3. *; This output level is psodo stable; that is it may not persist when S and R inputs return to their inactive
(high) level.
4. **; For latches with double S inputs; H; both S inputs high, L; one or b oth S inputs low.
Block Diagram (1/4)
R
S
1
S
2
Q
Absolute Maximum Ratings
Item Symbol Ratings Unit
Supply voltage VCC 7 V
Input voltage VIN 7 V
Power dissipation PT 400 mW
Storage temperature Tstg –65 to +150 °C
Note: Voltage value, unless otherwise noted, are with respect to network ground terminal.
Recommended Operating Conditions
Item Symbol Min Typ Max Unit
Supply voltage VCC 4.75 5.00 5.25 V
Output current
Operating temperature Topr –20 25 75 °C
IOH — — –400 µA
I
— — 8 mA
OL
Rev.4.00, May 10, 2006, page 2 of 4
Page 3
HD74LS279
Electrical Characteristics
(Ta = –20 to +75 °C)
Item Symbol min. typ.* max. Unit Condition
Input voltage
Output voltage
Input current
Short-circuit output current IOS –20 — –100 mA VCC = 5.25 V
Supply current** ICC — 3.8 7 mA VCC = 5.25 V
Input clamp voltage VIK — — –1.5 V VCC = 4.75 V, IIN = –18 mA
Notes: * VCC = 5 V, Ta = 25°C
** I
is measured with all R inputs grounded, all S inputs at 4.5 V, and all outputs open.
CC
VIH 2.0 — — V
VIL — — 0.8 V
VOH 2.7 — — V
V
OL
— — 0.4 IOL = 4 mA
— — 0.5
VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V,
= –400 µA
I
OH
V
IOL = 8 mA
VCC = 4.75 V, VIH = 2 V,
= 0.8 V
V
IL
IIH — 20 µA VCC = 5.25 V, VI = 2.7 V
IIL — –0.4 mA VCC = 5.25 V, VI = 0.4 V
— 0.1 mA VCC = 5.25 V, VI = 7 V
I
I
Switching Characteristics
(VCC = 5 V, Ta = 25°C)
Item Symbol Inputs Output min. typ. max. Unit Condition
t
— 12 22
PLH
Propagation delay time
t
PHL
R
t
PHL
Note: Refer to Test Circuit and Waveform of the Common Item "TTL Common Matter (Document No.: REJ27D0005-
0100)".
S
Q
— 13 21
— 15 27
ns C
= 15 pF, RL = 2 kΩ
L
Rev.4.00, May 10, 2006, page 3 of 4
Page 4
HD74LS279
Package Dimensions
P-DIP16-6.3x19.2-2.54 1.05g
16 9
1 8
0.89
Z
e c
DP-16FVPRDP0016AE-B
D
b
3
b
p
RENESAS CodeJEITA Package Code Previous Code
P-SOP16-5.5x10.06-1.27 0.24g
RENESAS CodeJEITA Package Code Previous Code
FP-16DAVPRSP0016DH-B
MASS[Typ.]
MASS[Typ.]
E
A
1
A
L
θ
e
1
( Ni/Pd/Au plating )
Dimension in Millimeters
Reference
Symbol
e
1
D
E
A
A
0.51
1
b
0.40 0.48
p
b
3
c
0.19 0.25 0.31
θ
e
2.29 2.54 2.79
Z
L
2.54
MaxNomMin
7.62
19.2
20.32
6.3
7.4
5.06
0.56
1.30
0° 15°
1.12
*1
D
16 9
Index mark
E
E
H
*2
F
b
p
c
NOTE)
1. DIMENSIONS"*1 (Nom)"AND"*2"
DO NOT INCLUDE MOLD FLASH.
2. DIMENSION"*3"DOES NOT
INCLUDE TRIM OFFSET.
Terminal cross section
81
Z
e
*3
b
p
xM
A
y
( Ni/Pd/Au plating )
1
A
Detail F
Dimension in Millimeters
Reference
L
1
Symbol
D
E
A
2
A
1
A
b
θ
L
p
b
1
c
c
1
θ
H
7.50 8.00
E
e
x
y
Z
L
L
1
10.06
5.50
0.400.34
7.80
1.27
1.15
MaxNomMin
10.5
0.200.100.00
2.20
0.46
0.250.200.15
8°0°
0.12
0.15
0.80
0.900.700.50
Rev.4.00, May 10, 2006, page 4 of 4
Page 5
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