======================================================================== 74F533 OCTAL TRANSPARENT LATCH (3-STATE OUTPUTS) ======================================================================== Family: Fairchild FAST (Advanced Schottky TTL) Source: 1980 Fairchild FAST Data Book, pages 4-108 ... 4-109 Status: PRELIMINARY -- page 4-108 carries a "Preliminary" watermark. Ratings: Vcc = +5.0 V +/-5%, TA = 0 to +70 deg C DESCRIPTION ----------- The 'F533 consists of eight latches with 3-state outputs for bus organized system applications. The flip-flops appear transparent to the data when Latch Enable (LE) is HIGH. When LE is LOW, the data that meets the setup times is latched. Data appears on the bus when the Output Enable (/OE) is LOW. When /OE is HIGH the bus output is in the high impedance state. The 'F533 is the same as the 'F373, except that the outputs are inverted. For description and logic diagram please see the 'F373 data sheet. o EIGHT LATCHES IN A SINGLE PACKAGE o 3-STATE OUTPUTS FOR BUS INTERFACING CONNECTION DIAGRAM (20-pin DIP) ------------------------------- Pin Function Pin Function --- --------------------------------- --- --------------------------------- 1 /OE Output Enable (active LOW) 20 Vcc 2 /O0 Complementary latch output 0 19 /O7 Complementary latch output 7 3 D0 Data input 0 18 D7 Data input 7 4 D1 Data input 1 17 D6 Data input 6 5 /O1 Complementary latch output 1 16 /O6 Complementary latch output 6 6 /O2 Complementary latch output 2 15 /O5 Complementary latch output 5 7 D2 Data input 2 14 D5 Data input 5 8 D3 Data input 3 13 D4 Data input 4 9 /O3 Complementary latch output 3 12 /O4 Complementary latch output 4 10 GND 11 LE Latch Enable (active HIGH) INPUT LOADING / FAN-OUT ----------------------- Pin Names Description U.L. HIGH/LOW ----------- -------------------------------- ------------- D0 - D7 Data Inputs 0.5 / 0.375 LE Latch Enable Input (Active HIGH) 0.5 / 0.375 /OE Output Enable Input (Active LOW) 0.5 / 0.375 /O0 - /O7 Complementary 3-State Outputs 25 / 12.5 DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE --------------------------------------------------- Symbol Parameter Min Typ Max Units ------ -------------------------------------- --- --- --- ----- ICC Power Supply Current (All Outputs OFF) 35 mA Conditions: Vcc = Max, /OE = 4.5 V; Dn, LE = Gnd. AC CHARACTERISTICS ------------------ Symbol Parameter Min Typ Max Units ---------- --------------------------- --- --- --- ----- tPLH Propagation Delay Dn to /On -- 5.3 -- ns tPHL Propagation Delay Dn to /On -- 3.7 -- ns tPLH Propagation Delay LE to /On -- 9.2 -- ns tPHL Propagation Delay LE to /On -- 4.2 -- ns tPZH, tPZL Output Enable Time -- -- -- ns tPHZ, tPLZ Output Disable Time (1) -- -- -- ns (1) Disable times measured with CL = 5.0 pF. AC OPERATING REQUIREMENTS ------------------------- Symbol Parameter Min Typ Max Units ------ ---------------------------- --- --- --- ----- ts (H) Setup Time, HIGH -- Dn to LE 3.0 -- -- ns ts (L) Setup Time, LOW -- Dn to LE 3.0 -- -- ns th (H) Hold Time, HIGH -- Dn to LE 2.0 -- -- ns th (L) Hold Time, LOW -- Dn to LE 2.0 -- -- ns tw (H) LE Pulse Width HIGH 6.0 -- -- ns