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Part: CD54AC257
Category:
Logic
-> Multiplexers/Demultiplexers
-> Multiplexers
Description:
Company: Texas Instruments, Inc.
Datasheet: Download CD54AC257 datasheet File size : 224 kB
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Datasheet text preview:
CD54/74AC257, CD54/74ACT257, CD74ACT258
Data sheet acquired from Harris Semiconductor SCHS248A
August 1998 - Revised May 2000
Quad 2-Input Multiplexer with Three-State Outputs
Description
The 'AC257, 'ACT257 and CD74ACT258 are quad 2-input multiplexers with three-state outputs that utilize Advanced CMOS Logic technology. Each of these devices selects four bits of data from two sources under the control of a common Select input (S). The Output Enable (OE) is active LOW. When OE is HIGH, all of the outputs (Y or Y) are in the highimpedance state regardless of all other input conditions. Moving data from two groups of registers to four common output buses is a common use of the 'AC257, 'ACT257, and CD74ACT258. The state of the Select input determines the par ticular register from which the data comes. The 'AC257, 'ACT257 and CD74ACT258 can also be used as function generators.
Features
· 'AC257, 'ACT257. . . . . . . . . . . . . Non-Inverting Outputs · CD74ACT258 . . . . . . . . . . . . . . . . . . . Inverting Outputs · Buffered Inputs · Typical Propagation Delay - 4.4ns 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 CD54AC257F3A CD74AC257E CD74AC257M TEMP. RANGE (oC) -55 to 125 PACKAGE 16 Ld CERDIP
0 to 70oC, -40 to 85, 16 Ld PDIP -55 to 125 0 to 70oC, -40 to 85, 16 Ld SOIC -55 to 125 -55 to 125 0 to 70oC, -40 to 85, -55 to 125 16 Ld CERDIP 16 Ld PDIP
Pinout
CD54AC257, CD54ACT257 (CERDIP) CD74AC257, CD74ACT257, CD74ACT258 (PDIP, SOIC) TOP VIEW
ACT258 S 1I0 1I1 1Y 2I0 2I1 2Y GND AC/ACT257 S1 1I0 2 1I1 3 1Y 4 2I0 5 2I1 6 2Y 7 GND 8 AC/ACT257 16 VCC 15 OE 14 4I0 13 4I1 12 4Y 11 3I0 10 3I1 9 3Y ACT258 VCC OE 4I0 4I1 4Y 3I0 3I1 3Y
CD54ACT257F3A CD74ACT257E CD74ACT257M CD74ACT258E CD74ACT258M NOTES:
0 to 70oC, -40 to 85, 16 Ld SOIC -55 to 125 0 to 70oC, -40 to 85, 16 Ld PDIP -55 to 125 0 to 70oC, -40 to 85, 16 Ld SOIC -55 to 125
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.
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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CD54/74AC257, CD54/74ACT257, CD74ACT258 Functional Diagram
AC/ACT AC/ACT 257 258 1I0 2I0 3I0 4I0 1I1 2I1 3I1 4I1 S OE 2 4 5 11 7 14 3 9 6 10 12 13 1 15 4Y 4Y 3Y 3Y 2Y 2Y 1Y 1Y
TRUTH TABLE OUTPUT ENABLE OE H L L L L SELECT INPUT S X L L H H DATA INPUTS I0 X L H X X I1 X X X L H 257 OUTPUTS Y Z L H L H 258 OUTPUTS Y Z H L H L
H = High level voltage, L = Low level voltage, Z = High impedance (off) state, X = Don't Care
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CD54/74AC257, CD54/74ACT257, CD74ACT258
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 (Plastic Package) . . . . . . . . . . 150oC 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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CD54/74AC257, CD54/74ACT257, CD74ACT258
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 Three-State 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 Three-State or 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 IOZ VCC or GND VIH or VIL VO = VCC or GND VCC or GND VCC -2.1 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 2 4.4 3.94 0.8 0.1 0.36 ±0.1 ±0.5 2 4.4 3.8 3.85 0.8 0.1 0.44 1.65 ±1 ±5 2 4.4 3.7 3.85 0.8 0.1 0.5 1.65 ±1 ±10 V V V V V V V V V V µA µA II IOZ VCC or GND VIH or VIL VO = VCC or GND VCC or GND 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 ±0.5 -40oC TO 85oC MIN MAX 0.1 0.1 0.1 0.44 0.44 1.65 ±1 ±5 -55oC TO 125oC MIN MAX 0.1 0.1 0.1 0.5 0.5 1.65 ±1 ±10 UNITS V V V V V V V µA µA
ICC
0
5.5
-
8
-
80
-
160
µA
ICC ICC
0 -
5.5 4.5 to 5.5
-
8 2.4
-
80 2.8
-
160 3
µA mA
4
CD54/74AC257, CD54/74ACT257, CD74ACT258
ACT Input Load Table
INPUT Data S OE UNIT LOAD 0.83 1.27 1.27
NOTE: Unit load is ICC limit specified in DC Electrical Specifications Table, e.g., 2.4mA max at 25oC.
Switching Specifications Input tr, tf = 3ns, CL = 50pF (Worst Case)
-40oC TO 85oC PARAMETER AC TYPES Propagation Delay, In to Y AC/ACT257 tPLH, tPHL 1.5 3.3 (Note 9) 5 (Note 10) Propagation Delay, S to Y AC/ACT257 tPLH, tPHL 1.5 3.3 5 Propagation Delay, OE to Y AC/ACT257 tPLZ, tPHZ, tPZL, tPZH 1.5 3.3 5 Propagation Delay, In to Y 'AC/CD74ACT258 tPLH, tPHL 1.5 3.3 5 Propagation Delay, S to Y 'AC/CD74ACT258 tPLH, tPHL 1.5 3.3 5 Propagation Delay, OE to Y 'AC/CD74ACT258 tPLZ, tPHZ, tPZL, tPZH 1.5 3.3 5 Three-State Output Capacitance Input Capacitance Power Dissipation Capacitance ACT TYPES Propagation Delay, In to Y AC/ACT257 Propagation Delay, S to Y AC/ACT257 tPLH, tPHL 5 (Note 10) 5 2.8 9.7 2.7 10.7 ns CO CI CPD (Note 11) 3.3 2.4 4.8 3.5 5.3 3.8 2.9 2.1 4.8 3.5 5.3 3.8 130 106 11.8 8.5 153 17.1 12.2 167 18.7 13.4 91 10.2 7.3 153 17.1 12.2 167 18.7 13.4 15 10 3.3 2.3 4.7 3.4 5.2 3.7 2.8 2 4.7 3.4 5.2 3.7 130 117 13 9.3 168 18.8 13.4 184 20.6 14.7 100 11.2 8 168 18.8 13.4 184 20.6 14.7 15 10 ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns pF pF pF SYMBOL VCC (V) MIN TYP MAX -55oC TO 125oC MIN TYP MAX UNITS
tPLH, tPHL
4
-
14
3.9
-
15.4
ns
5
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