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Part: CD54AC191F3A
Category:
Logic
-> Counters
-> Binary Counters
Description: ti CD54AC191, Presettable Synchronous 4-Bit Binary Up/down Counter
Company: Texas Instruments, Inc.
Datasheet: Download CD54AC191F3A datasheet File size : 186 kB
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Datasheet text preview:
CD54AC191, CD54ACT191
Data sheet acquired from Harris Semiconductor SCHS243A
October 1998 - Revised May 2000
Presettable Synchronous 4-Bit Binary Up/Down Counter
Description
The CD54AC191 and CD54ACT191 are asynchronously presettable binary up/down synchronous counters that utilize Advanced CMOS Logic technology. Presetting the counter to the number on preset data inputs (P0-P3) is accomplished by setting LOW the asynchronous parallel load input (PL). Counting occurs when PL is HIGH, Count Enable (CE) is LOW, and the Up/Down (U/D) input is either LOW for upcounting or HIGH for down-counting. The counter is incremented or decremented synchronously with the LOW-toHIGH transition of the clock. When an overflow or underflow of the counter occurs, the Terminal Count (TC) output, which is LOW during counting, goes HIGH and remains HIGH for one clock cycle. This output can be used for look-ahead carr y in high-speed cascading (see Figure 12). The TC output also initiates the Ripple Clock (RC) output which, normally HIGH, goes LOW and remains LOW for the low-level cascaded using the Ripple Count output.
Features
· Buffered Inputs · Typical Propagation Delay - 12.8ns at VCC = 5V, TA = 25oC, CL = 50pF · Exceeds 2kV ESD Protection MIL-STD-883, Method 3015 · SCR-Latchup-Resistant CMOS Process and Circuit Design · Speed of Bipolar FASTTM/AS/S with Significantly Reduced Power Consumption · Balanced Propagation Delays · AC Types Feature 1.5V to 5.5V Operation and Balanced Noise Immunity at 30% of the Supply · ±24mA Output Drive Current - Fanout to 15 FASTTM ICs - Drives 50 Transmission Lines
Ordering Information
PART NUMBER CD54AC191F3A CD54ACT191F3A NOTES: 1. When ordering, use the entire part number. Add the suffix 96 to obtain the variant in the tape and reel. 2. Wafer and die for this part number is available which meets all electrical specifications. Please contact your local TI sales office or customer service for ordering information. TEMP. RANGE (oC) -55 to 125 -55 to 125 PACKAGE 16 Ld CERDIP 16 Ld CERDIP
Pinout
CD54AC191, CD54ACT191 (CERDIP) TOP VIEW
P1 1 Q1 2 Q0 3 CE 4 U/D 5 Q2 6 Q3 7 GND 8
16 VCC 15 P0 14 CP 13 RC 12 TC 11 PL 10 P2 9 P3
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures. FASTTM is a Trademark of Fairchild Semiconductor. Copyright © 2000, Texas Instruments Incorporated
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CD54AC191, CD54ACT191 Functional Diagram
BINARY PRESET P0 15 ASYN. PARALLEL 11 LOAD ENABLE P1 1 P2 10 P3 9 3 2 CLOCK 14 6 7 UP/DOWN 5 Q2 Q3 Q0 Q1 BINARY OUTPUTS
12 TERMINAL COUNT COUNT ENABLE 4 13 RIPPLE CLOCK
TRUTH TABLE INPUTS PL H H L H CE L L X H U/D L H X X CP X X FUNCTION Count Up Count Down Asynchronous Preset No Change
U/D or CE should be changed only when clock is high. X = Don't Care = Low-to-High clock transition.
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CD54AC191, CD54ACT191
Absolute Maximum Ratings
DC Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to 6V DC Input Diode Current, IIK For VI VCC + 0.5V . . . . . . . . . . . . . . . . . . . . . .±20mA DC Output Diode Current, IOK For VO VCC + 0.5V . . . . . . . . . . . . . . . . . . . .±50mA DC Output Source or Sink Current per Output Pin, IO For VO > -0.5V or VO < VCC + 0.5V . . . . . . . . . . . . . . . . . . . .±50mA DC VCC or Ground Current, ICC or IGND (Note 3) . . . . . . . . .±100mA
Thermal Information
Thermal Resistance (Typical, Note 5) JA (oC/W) PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ___ SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ___ Maximum Junction Temperature (Hermetic Package or Die) . . . 175oC Maximum Storage Temperature Range . . . . . . . . . .-65oC to 150oC Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300oC
Operating Conditions
Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . -55oC to 125oC Supply Voltage Range, VCC (Note 4) AC Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.5V to 5.5V ACT Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.5V to 5.5V DC Input or Output Voltage, VI, VO . . . . . . . . . . . . . . . . . 0V to VCC Input Rise and Fall Slew Rate, dt/dv AC Types, 1.5V to 3V . . . . . . . . . . . . . . . . . . . . . . . . . 50ns (Max) AC Types, 3.6V to 5.5V . . . . . . . . . . . . . . . . . . . . . . . . 20ns (Max) ACT Types, 4.5V to 5.5V. . . . . . . . . . . . . . . . . . . . . . . 10ns (Max)
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES: 3. For up to 4 outputs per device, add ±25mA for each additional output. 4. Unless otherwise specified, all voltages are referenced to ground. 5. JA is measured with the component mounted on an evaluation PC board in free air.
DC Electrical Specifications
TEST CONDITIONS PARAMETER AC TYPES High Level Input Voltage VIH 1.5 3 5.5 Low Level Input Voltage VIL 1.5 3 5.5 High Level Output Voltage VOH VIH or VIL -0.05 -0.05 -0.05 -4 -24 -75 (Note 6, 7) -50 (Note 6, 7) 1.5 3 4.5 3 4.5 5.5 5.5 1.2 2.1 3.85 1.4 2.9 4.4 2.58 3.94 0.3 0.9 1.65 1.2 2.1 3.85 1.4 2.9 4.4 2.48 3.8 3.85 0.3 0.9 1.65 1.2 2.1 3.85 1.4 2.9 4.4 2.4 3.7 3.85 0.3 0.9 1.65 V V V V V V V V V V V V V SYMBOL VI (V) IO (mA) VCC (V) 25oC MIN MAX -40oC TO 85oC MIN MAX -55oC TO 125oC MIN MAX UNITS
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CD54AC191, CD54ACT191
DC Electrical Specifications (Continued)
TEST CONDITIONS PARAMETER Low Level Output Voltage SYMBOL VOL VI (V) VIH or VIL IO (mA) 0.05 0.05 0.05 12 24 75 (Note 6, 7) 50 (Note 6, 7) Input Leakage Current Quiescent Supply Current MSI ACT TYPES High Level Input Voltage Low Level Input Voltage High Level Output Voltage VIH VIL VOH VIH or VIL -0.05 -24 -75 (Note 6, 7) -50 (Note 6, 7) Low Level Output Voltage VOL VIH or VIL 0.05 24 75 (Note 6, 7) 50 (Note 6, 7) Input Leakage Current Quiescent Supply Current MSI Additional Supply Current per Input Pin TTL Inputs High 1 Unit Load NOTES: 6. Test one output at a time for a 1-second maximum duration. Measurement is made by forcing current and measuring voltage to minimize power dissipation. 7. Test verifies a minimum 50 transmission-line-drive capability at 85oC, 75 at 125oC. II ICC ICC VCC or GND VCC or GND VCC -2.1 0 4.5 to 5.5 4.5 to 5.5 4.5 4.5 5.5 5.5 4.5 4.5 5.5 5.5 5.5 5.5 4.5 to 5.5 2 4.4 3.94 0.8 0.1 0.36 ±0.1 8 2.4 2 4.4 3.8 3.85 0.8 0.1 0.44 1.65 ±1 80 2.8 2 4.4 3.7 3.85 0.8 0.1 0.5 1.65 ±1 160 3 V V V V V V V V V V µA µA mA II ICC VCC or GND VCC or GND 0 VCC (V) 1.5 3 4.5 3 4.5 5.5 5.5 5.5 5.5 25oC MIN MAX 0.1 0.1 0.1 0.36 0.36 ±0.1 8 -40oC TO 85oC MIN MAX 0.1 0.1 0.1 0.44 0.44 1.65 ±1 80 -55oC TO 125oC MIN MAX 0.1 0.1 0.1 0.5 0.5 1.65 ±1 160 UNITS V V V V V V V µA µA
ACT Input Load Table
INPUT P0-P3, PL CL, U/D, CE UNIT LOAD 0.75 0.85
NOTE: Unit load is ICC limit specified in DC Electrical Specifications Table, e.g., 2.4mA max at 25oC.
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CD54AC191, CD54ACT191
Prerequisite For Switching Function
-40oC TO 85oC PARAMETER AC TYPES Max. Frequency fMAX (Note 10) 1.5 3.3 (Note 8) 5 (Note 9) CP Pulse Width tW 1.5 3.3 5 PL Pulse Width tW 1.5 3.3 5 Recovery Time tREC 1.5 3.3 5 Set-Up Time, Pn to PL tSU 1.5 3.3 5 Set-Up Time, CE to CP tSU 1.5 3.3 5 Set-Up Time, U/D to CP tSU 1.5 3.3 5 Hold Time, Pn to PL tH 1.5 3.3 5 Hold Time, CE to CP tH 1.5 3.3 5 Hold Time, U/D to CP tH 1.5 3.3 5 ACT TYPES Max. Frequency CP Pulse Width PL Pulse Width Recovery Time Set-Up Time, Pn to PL fMAX (Note 10) tW tW tREC tSU 5 (Note 9) 5 5 5 5 68 7.3 5.3 5.7 3.5 60 8.3 6 6.5 4 MHz ns ns ns ns 5.5 49 68 91 10.5 7.3 66 7.4 5.3 71 8 5.7 44 4.9 3.5 115 12.9 9.2 132 14.7 10.5 22 2.5 2 0 0 0 0 0 0 4.8 43 60 104 11.6 8.3 75 8.4 6 81 9.1 6.5 50 5.6 4 131 14.7 10.5 150 16.8 12 25 2.8 2 0 0 0 0 0 0 MHz MHz MHz ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns SYMBOL VCC (V) MIN MAX -55oC TO 125oC MIN MAX UNITS
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