TC74HC279AF
TC74HC279AF is Quad S-R Latch manufactured by Toshiba.
- Part of the TC74HC279 comparator family.
- Part of the TC74HC279 comparator family.
Features
- High speed: tpd = 12 ns (typ.) at VCC = 5 V
- Low power dissipation: ICC = 2 μA (max) at Ta = 25°C
- High noise immunity: VNIH = VNIL = 28% VCC (min)
- Symmetrical output impedance: |IOH| = IOL = 4 m A (min)
- Balanced propagation delays: tp LH ∼- tp HL
- Wide operating voltage range: VCC (opr) = 2 to 6 V
- Pin and function patible with 74LS279
Pin Assignment
TC74HC279AP
Weight DIP16-P-300-2.54A SOP16-P-300-1.27A
: 1.00 g (typ.) : 0.18 g (typ.)
Start of mercial production
1988-05 1 2014-03-01
IEC Logic Symbol
1S1 1S2 1R 2S 2R 3S1 3S2 3R
(2) (3) (1)
(6) (5) (11) (12) (10)
4S (15)
& S1
R S2
R & S3
R S4
4R (14) R
1 (4) 1Q 2 (7) 2Q 3 (9) 3Q 4 (13) 4Q
Truth Table
Inputs S# R HH LH HL LL
Output Q Qn H L H
Qn: The level of Q before the indicated input condition were established. #: For latches with doubles S input.
H = Both S input high L = One of both inputs low
System Diagram
TC74HC279AP/AF
2 2014-03-01
Absolute Maximum Ratings (Note 1)
TC74HC279AP/AF
Characteristics
Symbol
Rating
Unit
Supply voltage range DC input voltage DC output voltage Input diode current Output diode current DC output current DC VCC/ground current Power dissipation Storage...