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TC74HC279AF

Toshiba
Part Number TC74HC279AF
Manufacturer Toshiba
Description Quad S-R Latch
Published May 26, 2016
Detailed Description TC74HC279AP/AF TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74HC279AP, TC74HC279AF Quad S -R Latch The ...
Datasheet PDF File TC74HC279AF PDF File

TC74HC279AF
TC74HC279AF


Overview
TC74HC279AP/AF TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74HC279AP, TC74HC279AF Quad S -R Latch The TC74HC279A is a high speed CMOS QUAD S-R LATCH fabricated with silicon gate C2MOS technology.
It achieves the high speed operation similar to equivalent LSTTL while maintaining the CMOS low power dissipation.
Each latch has an independent Q output and Set and Reset inputs.
S and R are active low.
When S input is low, the Q output goes high and when R input is low, the Q output goes low.
When both S and R are low, S takes precedence resulting Q = low.
When both of S and R are held high, Q output doesn’t change.
All inputs are equipped with protection circuits against static discharge or transient excess voltage.
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 mA (min) • Balanced propagation delays: tpLH ∼− tpHL • Wide operating voltage range: VCC (opr) = 2 to 6 V • Pin and function compatible with 74LS279 Pin Assignment TC74HC279AP TC74HC279AF Weight DIP16-P-300-2.
54A SOP16-P-300-1.
27A : 1.
00 g (typ.
) : 0.
18 g (typ.
) Start of commercial 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 temperature VCC VIN VOUT IIK IOK IOUT ICC PD Tstg...


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