STIXL | ae SN54ABT573A, SN74ABT573A OCTAL TRANSPARENT D-TYPE LATCHES WITH 3-STATE OUTPUTS SCBS190B JANUARY 1991 - MARCH 1996 SN54ABT573A ... JOR W PACKAGE SN74ABT573A ... DB, DW, OR N PACKAGE (TOP VIEW) State-of-the-Art EPIC-IIB BiCMOS Design Significantly Reduces Power Dissipation @ ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015; Exceeds SE tl, ~ coll Veo 200 V Using Machine Model 1D fJ2 19{] 1 (C = 200 pF, R = 0) op {ls _iaf}20 Latch-Up Performance Exceeds 500 mA 3D []4 17[] 3Q Per JEDEC Standard JESD-17 4D [5 16]] 4Q @ Typical Vo;_p (Output Ground Bounce) 5D [6 151] 5Q <1Vat Voc = 5 V, Ta = 25C 6D []7 141} 6Q @ High-Drive Outputs (-32-mA Ion, 7D Je = 13f] 70 64-MA Io.) 8D f{]9 121] 8Q @ Package Options Include Plastic GND []10 npLe Smaill-Outline (DW) and Shrink Small-Outline (DB) Packages, Ceramic Chip Carriers (FK), and Plastic (N) and Ceramic (J) DIPs, and Ceramic Flat (W) SN54ABT573A ... FK PACKAGE (TOP VIEW) Oo lu a a6 09 PRODUCTION DATA information ie current es of date. Products conform to standard warrenty. testing of all parameters. Packages description 3D 43 2 1 20 960 20 These 8-bit latches feature 3-state outputs 4DUs5 re 3Q designed specifically for driving highly capacitive SDH 6 16L] 4Q or relatively low-impedance loads. They are 6D 7 15{] 5a particularly suitable for implementing buffer 7D a 10 11121 ial 6Q registers, I/O ports, bidirectional bus drivers, and working registers. The eight latches of the ABT573A are transparent D-type latches. While the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs. When the latch enable is taken low, the Q outputs are latched at the logic levels set up at the D inputs. A buffered output-enabie (OE) input can be used to place the eight outputs in either a normal logic state (high or low logic levels) or a high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without need for interface or pullup components. OE does not affect the internal operations of the latches. Old data can be retained or new data can be entered while the outputs are in the high-impedance state. To ensure the high-impedance state during power up or power down, OE should be tied to Voc through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. The SN74ABT573 | | 3V Input 1.5 x Xs Vv Data Input OV VOLTAGE WAVEFORMS VOLTAGE WAVEFORMS PULSE DURATION SETUP AND HOLD TIMES 3V 3V Input Output 15V (see Note B) Xs V Xs V ov Control x SV x OV tPZL > tPLH 7 oe tPHL Vo Output aN uz + 3.5V Waveform 1 Output | Lisv : sy Slat 7V | \1.5V | E Vou +03 y VOL | VOL | | (see Note C) tpHz ae tpHL >| k>- tPLH cue ZH _ utpu __ sv | Cay VOH Waveform 2 ieV Vouo3v OH Output . . $1 at Open , ~ VOL (gee Note C) = OV , VOLTAGE WAVEFORMS VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES ENABLE AND DISABLE TIMES INVERTING AND NONINVERTING OUTPUTS LOW- AND HIGH-LEVEL ENABLING NOTES: A. B c. D C_ includes probe and jig capacitance. . Allinput pulses are supplied by generators having the following characteristics: PRR < 10 MHz, Zo = 50 Q, tp $2.5 ns, tfs 2.5 ns. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform 2 is for an output with intemal conditions such that the output is high except when disabled by the output control. . The outputs are measured one at a time with one transition per measurement. Figure 1. Load Circuit and Voltage Waveforms vy TEXAS INSTRUMENTS POST OFFICE BOX 655303 DALLAS, TEXAS 75265