SN74ALS191ANSRE4



 

 
   
SDAS210C − DECEMBER 1982 − REVISED JULY 1996 D Single Down / Up Count-Control Line D Look-Ahead Circuitry Enhances Speed of SN54ALS191A . . . J PACKAGE SN74ALS191A . . . D OR N PACKAGE (TOP VIEW) Cascaded Counters D Fully Synchronous in Count Modes D Asynchronously Presettable With Load D B QB QA CTEN D/U QC QD GND Control Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 VCC A CLK RCO MAX/MIN LOAD C D description SN54ALS191A . . . FK PACKAGE (TOP VIEW) QB B NC VCC A The ’ALS191A are synchronous 4-bit reversible up/down binary counters. Synchronous counting operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincidentally with each other when instructed by the steering logic. This mode of operation eliminates the output counting spikes normally associated with asynchronous (ripple-clock) counters. QA CTEN NC D/U QC 3 2 1 20 19 18 5 17 6 16 7 15 8 14 9 10 11 12 13 CLK RCO NC MAX/MIN LOAD QD GND NC D C The outputs of the four flip-flops are triggered on a low-to-high-level transition of the clock (CLK) input if the count enable (CTEN) input is low. A high at CTEN inhibits counting. The direction of the count is determined by the level of the down/up (D/U) input. When D/U is low, the counter counts up, and when D/U is high, the counter counts down. 4 NC − No internal connection These counters feature a fully independent clock circuit. Changes at the control inputs (CTEN and D/U) that modify the operating mode have no effect on the contents of the counter until clocking occurs. The function of the counter is dictated solely by the conditions meeting the stable setup and hold times. These counters are fully programmable. Each output can be preset to either level by placing a low on the LOAD input and entering the desired data at the data inputs. The output changes to agree with the data inputs independently of the level of the clock input. This feature allows the counters to be used as modulo-N dividers by simply modifying the count length with the preset inputs. CLK, D/U, and LOAD are buffered to lower the drive requirement, which significantly reduces the loading on (current required by) clock drivers, for long parallel words. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Copyright  1996, Texas Instruments Incorporated   !" # $%&" !#  '%()$!" *!"&+ *%$"# $ " #'&$$!"# '& ",& "&#  &-!# #"%&"# #"!*!* .!!"/+ *%$" '$&##0 *&# " &$&##!)/ $)%*& "&#"0  !)) '!!&"&#+ • POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443 • 1 


 

 
   
SDAS210C − DECEMBER 1982 − REVISED JULY 1996 description (continued) Two outputs are available to perform the cascading function: ripple clock and maximum/minimum count. The latter output produces a high-level output pulse with a duration approximately equal to one complete cycle of the clock while the count is minimum (0) counting down or maximum (15) counting up. The ripple-clock output (RCO) produces a low-level output pulse under those same conditions, but only while the clock input is low. The counter easily can be cascaded by feeding the ripple-clock output to the enable input of the succeeding counter if parallel clocking is used, or to the clock input if parallel enabling is used. The maximum/minimum count (MAX/MIN) output can be used to accomplish look ahead for high-speed operation. The SN54ALS191A is characterized for operation over the full military temperature range of −55°C to 125°C. The SN74ALS191A is characterized for operation from 0°C to 70°C. logic symbol† CTEN D/U CLK LOAD A B C D 4 5 14 11 15 1 G1 CTRDIV16 M2 [DOWN] 2(CT=0)Z6 3(CT=15)Z6 M3 [UP] 1,2− / 1,3+ G4 6,1,4 13 MAX/MIN RCO C5 [1] 5D [2] 10 [4] 9 [8] † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the D, J, and N packages. 2 12 • POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443 • 3 2 6 7 QA QB QC QD 


 

 
   
SDAS210C − DECEMBER 1982 − REVISED JULY 1996 logic diagram (positive logic) 12 CTEN D/U CLK LOAD A MAX/ MIN 4 13 RCO 5 14 11 15 3 S QA C1 1D R B 1 2 S QB C1 1D R C 10 6 S C1 QC 1D R D 9 7 S QD C1 1D R Pin numbers shown are for the D, J, and N packages. • POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443 • 3 


 

 
   
SDAS210C − DECEMBER 1982 − REVISED JULY 1996 typical load, count, and inhibit sequences The following sequence is illustrated below: 1. Load (preset) to binary 13 2. Count up to 14, 15 (maximum), 0, 1, and 2 3. Inhibit 4. Count down to 1, 0 (minimum), 15, 14, and 13 LOAD A B Data Inputs C D CLK D/U CTEN QA QB QC QD MAX/MIN RCO 13 14 15 0 1 2 2 Count Up 2 Inhibit Load 4 • POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443 • 1 0 15 14 Count Down 13 


 

 
   
SDAS210C − DECEMBER 1982 − REVISED JULY 1996 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Operating free-air temperature range, TA: SN54ALS191A . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55°C to 125°C SN74ALS191A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C † Stresses beyond 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 these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. recommended operating conditions SN54ALS191A VCC VIH Supply voltage VIL IOH Low-level input voltage IOL fclock Low-level output current tw Pulse duration tsu High-level input voltage NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 2 High-level output current th Hold time TA Operating free-air temperature 2 0 V −0.4 mA 20 0 20 16.5 25 20 Data before LOAD↑ 25 20 CTEN before CLK↑ 45 20 D/U before CLK↑ 30 20 LOAD inactive before CLK↑ 20 20 Data after LOAD↑ 5 5 CTEN after CLK↑ 0 0 0 • POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443 • V −0.4 LOAD low −55 V 0.8 CLK high or low D/U after CLK↑ UNIT 0.7 4 Clock frequency Setup time SN74ALS191A MIN 8 mA 30 MHz ns ns ns 0 125 0 70 °C 5 


 

 
   
SDAS210C − DECEMBER 1982 − REVISED JULY 1996 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER SN54ALS191A TYP† MAX TEST CONDITIONS MIN VIK VOH VCC = 4.5 V, VCC = 4.5 V to 5.5 V, II = − 18 mA IOH = − 0.4 mA VOL VCC = 4.5 V IOL = 4 mA IOL = 8 mA II IIH VCC = 5.5 V, VCC = 5.5 V, VI = 7 V VI = 2.7 V −1.5 VCC − 2 All others VCC = 5.5 V, UNIT −1.5 V 0.25 0.4 V 0.35 0.5 VCC − 2 0.25 0.4 0.2 CTEN or CLK IIL SN74ALS191A TYP† MAX MIN VI = 0.4 V 0.1 mA µA 20 20 −0.2 −0.2 −0.2 −0.1 mA IO‡ VCC = 5.5 V, VO = 2.25 V −20 −112 −30 − 112 mA ICC VCC = 5.5 V, All inputs at 0 12 22 12 22 mA † All typical values are at VCC = 5 V, TA = 25°C. ‡ 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) PARAMETER FROM (OUTPUT) TO (OUTPUT) VCC = 4.5 V to 5.5 V, CL = 50 pF, RL = 500 Ω, TA = MIN to MAX§ SN54ALS191A MIN fmax tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL tPLH MAX 20 LOAD Any Q A, B, C, D Any Q CLK RCO CLK Any Q CLK MAX/MIN D/U RCO D/U MAX/MIN UNIT SN74ALS191A MIN MAX 30 MHz 7 37 7 30 8 34 8 30 3 25 3 21 4 25 4 21 5 24 5 20 5 25 5 20 3 26 3 18 3 22 3 18 8 37 8 31 8 34 8 31 8 45 8 37 10 36 10 28 8 35 8 25 8 30 8 25 4 21 4 CTEN RCO tPHL 4 23 4 § For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. 18 tPHL tPLH tPHL tPLH 6 • POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443 • 18 ns ns ns ns ns ns ns ns 


 

 
   
SDAS210C − DECEMBER 1982 − REVISED JULY 1996 PARAMETER MEASUREMENT INFORMATION SERIES 54ALS/74ALS AND 54AS/74AS DEVICES 7V RL = R1 = R2 VCC S1 RL R1 Test Point From Output Under Test CL (see Note A) From Output Under Test RL Test Point CL (see Note A) CL (see Note A) LOAD CIRCUIT FOR BI-STATE TOTEM-POLE OUTPUTS LOAD CIRCUIT FOR OPEN-COLLECTOR OUTPUTS 3.5 V Timing Input Test Point From Output Under Test LOAD CIRCUIT FOR 3-STATE OUTPUTS 3.5 V High-Level Pulse 1.3 V R2 1.3 V 1.3 V 0.3 V 0.3 V tsu Data Input tw th 3.5 V 1.3 V 3.5 V Low-Level Pulse 1.3 V 0.3 V 1.3 V 0.3 V VOLTAGE WAVEFORMS SETUP AND HOLD TIMES VOLTAGE WAVEFORMS PULSE DURATIONS 3.5 V Output Control (low-level enabling) 1.3 V 1.3 V 0.3 V tPZL Waveform 1 S1 Closed (see Note B) tPLZ 3.5 V Input tPHZ 1.3 V 0.3 V tPHL tPLH VOH In-Phase Output VOL 0.3 V 1.3 V 1.3 V VOL tPLH tPHL VOH 1.3 V 1.3 V [3.5 V 1.3 V tPZH Waveform 2 S1 Open (see Note B) 1.3 V VOH Out-of-Phase Output (see Note C) 0.3 V [0 V 1.3 V 1.3 V VOL VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS NOTES: A. CL 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. C. When measuring propagation delay items of 3-state outputs, switch S1 is open. D. All input pulses have the following characteristics: PRR ≤ 1 MHz, tr = tf = 2 ns, duty cycle = 50%. E. The outputs are measured one at a time with one transition per measurement. Figure 1. Load Circuits and Voltage Waveforms • POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443 • 7 PACKAGE OPTION ADDENDUM www.ti.com 14-Oct-2022 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) Samples (4/5) (6) 5962-86840012A ACTIVE LCCC FK 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 596286840012A SNJ54ALS 191AFK 5962-8684001EA ACTIVE CDIP J 16 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 5962-8684001EA SNJ54ALS191AJ Samples 5962-8684001FA ACTIVE CFP W 16 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 5962-8684001FA SNJ54ALS191AW Samples SN74ALS191AD ACTIVE SOIC D 16 40 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 ALS191A Samples SN74ALS191ADR ACTIVE SOIC D 16 2500 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 ALS191A Samples SN74ALS191AN ACTIVE PDIP N 16 25 RoHS & Green NIPDAU N / A for Pkg Type 0 to 70 SN74ALS191AN Samples SNJ54ALS191AFK ACTIVE LCCC FK 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 596286840012A SNJ54ALS 191AFK SNJ54ALS191AJ ACTIVE CDIP J 16 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 5962-8684001EA SNJ54ALS191AJ Samples SNJ54ALS191AW ACTIVE CFP W 16 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 5962-8684001FA SNJ54ALS191AW Samples (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of