Designed Specifically for High-Speed Memory Decoders and Data Transmission Systems Incorporate Two Enable Inputs to Simplify Cascading and/or Data Reception Package Options Inciude Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mi! DIPs description The ALS139 are dual 2-line to 4-line decoders/demultiplexers designed for use in high-performance memory-decoding or data- routing applications requiring very short propagation delay times. In high-performance memory systems, these devices can minimize the effects of system decoding. When employed with high-speed memories utilizing a fast-enable circuit, the delay times of these decoders and the enable time of the memory are usually less than the typical access time of the memory. Therefore, the effective system delay introduced by the Schottky-clamped system decoder is negligible. Tha ALS139 comprise two individual 2-line to 4-line decoders in a single package. The active-low enable (G) input can be used as a data line in demultiplexing applications. These SN54ALS139, SN74ALS139 DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS SOAS204A ~ APRIL 1982 - REVISED DECEMBER 1994 SN54ALS139... J PACKAGE SN74ALS139. ..D OR N PACKAGE (TOP VIEW) 161 V 161] Voc 1AlJ2 15) 2G 1BO3 14] 2A 170 (}4 13[) 28 wiils 121) 2Y0 12 (6 aif) 21 13]7 10f) 22 GND [Is gf] 2Y3 SN54ALS139 .. . FK PACKAGE (TOP VIEW) <2 8g 3.2 1 2019 1B 18L] 2A 1Y0 28 NC NC 11 270 1Y2 2y1 NC No internal connection decoders/demultiplexers feature fully buffered inputs, each of which represents only one normalized load to its driving circuit. All inputs are clamped with high-performance Schottky diodes to suppress line ringing and simplify system design. The SN54ALS139 is characterized for operation over the full military temperature range of -55C to 125C. The SN74ALS8139 is characterized for operation from 0C to 70C. INSTRUMENTS POST OFFICE BOX 655303 DALLAS, TEXAS 75265 FUNCTION TABLE INPUTS ENABLE SELECT OUTPUTS 6 B A | Yo Yi 2. 3 H x x H H H H L L L L H H H L L H H L H H L H L H H L H L H H H H H L PRODUCTION | DATA information ae current ad a pibbeston y Copyright 1994, Texas Instruments incorporated aid noe dows net necessarily Ww 2~143 SN54ALS139, SN74ALS139 DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS SDAS2044 APRIL 1982 - REVISED DECEMBER 1994 logic symbols (alternatives)t 2 xy 4 2 4 1A 10 1A 10 3 5 3 5 18 11 1B 11 6 6 1G 12 16 12 7 7 13 13 2 2Y0 12 2Y0 oa 4 "1 2a * " 13 21 13 2vt 2B 10 2B 10 a 15 3 22 - 18 3 22 2 23 23 t These symbols are in accordance with ANSI/EEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the D, J, and N packages. logic diagram (positive logic) XN 1Y0 Enable 1q@ ! 11 12 1A Select Inputs 13 1B Date, Outputs 2Yo Enable 26 2v1 22 2A Select Inputs J 2B 13 23 Pin numbers shown are for the D, J, and N packages. Ses Wy TEXAS INSTRUMENTS 2-144 POST OFFICE BOX 855303 DALLAS, TEXAS 75265 SN54ALS139, SN74ALS139 DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS SDAS204A APRIL 1982 - REVISED DECEMBER 1994 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)t Supply voltage, Voc Input voltage, Vp. en eee ene n ecb d etn e tented eee n enn een eenes 7V Operating free-air temperature range, Ta: SN54ALS139 .... 0... eee eee -58C to 126C SN74ALS139 2.2... ccna 0C to 70C Le ee eee nee ere enn eee tenes -65C to 150C t Stresses bayond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at thase or any other conditions bayond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. Storage temperature range recommended operating conditions SN54ALS139 SN74ALS139 UNIT MIN NOM MAX| MIN NOM MAX Voc Supply voltage 45 5 5.5 45 5 5.5 V VIH High-levet input voltage 2 2 Vv VIL Low-level input voltage 0.7 0.8 V 1oH High-level output current -0.4 ~0.4] mA lot Low-level output current 4 8] mA Ta Operating free-air tamperature ~55 125 0 70 C electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) SNS54ALS139 SN74ALS139 PARAMETER TEST CONDITIONS UNIT MIN TYPE MAX] MIN TYP# MAX Vik Voc = 4.5V, \)=18 mA -12 -12] Vv VOH Voc = 4.5 V to5.5V, lOH = 9.4 mA Voc -2 Voc -2 V lo, = 4mA 0.25 0.4 0.25 0.4 VoL Voc = 4.5 V Ob v lol = 8mA 035 0.5 I Voc = 5.5V, Vpa7V 0.1 0.1} mA Win Voc =5.5V, Vi=a27V 20 20] pA Mm Voc = 5.5V, Vp = 0.4V -0.1 -0.1| mA 108 Voc = 55, Vo = 2.25 V =20 -112| -30 -112| mA ioc Voc =5.5V 8 13 8 13] mA + Alt typical values are at Voc = 5 V, Ta = 25C. The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, Ios. switching characteristics (see Figure 1) Voc = 4.5 V to 5.5 V, C= 50 pF, FROM TO Ry = 500.9, PARAMETER (INPUT) (OUTPUT) Ta = MIN to MAX! UNIT SN54ALS139 | SN74ALS139 MIN MAX] MIN MAX t 17 14 PLH AorB Y 3 3 ns tPHL 3 17 3 14 PLM 5 y 3 17 3 14 ns tPHL 3 18 3 15 4 For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. wy INSTRUMENTS POST OFFICE BOX 665303 DALLAS, TEXAS 75265 2-145 SN54ALS139, SN74ALS139 DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS SDAS204A APRIL 1982 - REVISED DECEMBER 1994 PARAMETER MEASUREMENT INFORMATION SERIES 54ALS/74ALS AND 54AS/74AS DEVICES 7V Voc ! AL = Rt = R2 $1 AL T Ai From Output eat From Output Test From Output P Test Under Test Point Under Test Point Under Test Point Not ou = AL CL Not ot * 2 (see Note A) (see Note A) T (see Note A) LOAD CIRCUIT FOR . BI-STATE LOAD CIRCUIT LOAD CIRCUIT TOTEM-POLE OUTPUTS FOR OPEN-COLLECTOR OUTPUTS FOR 3-STATE OUTPUTS 3.5V - 35V Timin High-Level input 1.3V 8 Pulse 1.3V 1.3V -~ 0.3V 0.3V -~ 35V 3.5V Date | a Input 1.3V 1.3V Low reel 1.3V 1.3V 0.3V 03V VOLTAGE WAVEFORMS VOLTAGE WAVEFORMS SETUP AND HOLD TIMES PULSE DURATIONS Output Control (low-level enabling) PN pr 3.6 V tezL ye lg. Input 1.3 13V | > | | O3V Wavetorm 1 | 'PLH > ance tPHL S1 Closed | vV In-Phase OH (eee Note B) Output! 1.3 | 1.aV le ok Vo. 'PLH tpHL > P| Waveform 2 Out-of-Phase | Vou S1 Open Output 13V 1.3V (see Note B) (see Note C) - VoL VOLTAGE WAVEFORMS VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS PROPAGATION DELAY TIMES NOTES: A. Cy includes probe and Jig capacitance. B. 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 internal conditions such that the output is high except when disabled by the output control. . When measuring propagation delay items of 3-state outputs, switch S1 is open. . Alt input pulses have the following characteristics: PRR < 1 MHz, t, = 4 = 2.ns, duty cycle = 50%. The outputs are measured one at a time with one transition par measurement. moo Figure 1. Load Circults and Voltage Waveforms wy INSTRUMENTS 2-146 POST OFFICE BOX 655303 DALLAS, TEXAS 75265