74ACT257SJX

Revised November 1999 74AC257 • 74ACT257 Quad 2-Input Multiplexer with 3-STATE Outputs General Description Features The AC/ACT257 is a quad 2-input multiplexer with 3STATE outputs. Four bits of data from two sources can be selected using a Common Data Select input. The four outputs present the selected data in true (noninverted) form. The outputs may be switched to a high impedance state by placing a logic HIGH on the common Output Enable (OE) input, allowing the outputs to interface directly with bus-oriented systems. ■ ICC and IOZ reduced by 50% ■ Multiplexer expansion by tying outputs together ■ Noninverting 3-STATE outputs ■ Outputs source/sink 24 mA ■ ACT257 has TTL-compatible inputs Ordering Code: Order Number Package Number Package Description 74AC257SC M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74AC257SJ 74AC257MTC MTC16 74AC257PC N16E 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide 74ACT257SC M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body 74ACT257SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74ACT257MTC MTC16 74ACT257PC N16E 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code. Logic Symbols Connection Diagram IEEE/IEC Pin Descriptions Pin Names Description S Common Data Select Input OE 3-STATE Output Enable Input I0a–I0d Data Inputs from Source 0 I1a–I1d Data Inputs from Source 1 Za–Zd 3-STATE Multiplexer Outputs FACT is a trademark of Fairchild Semiconductor Corporation. © 1999 Fairchild Semiconductor Corporation DS009949 www.fairchildsemi.com 74AC257 • 74ACT257 Quad 2-Input Multiplexer with 3-STATE Outputs November 1988 74AC257 • 74ACT257 Functional Description Truth Table The AC/ACT257 is quad 2-input multiplexer with 3-STATE outputs. It selects four bits of data from two sources under control of a Common Data Select input. When the Select input is LOW, the I0x inputs are selected and when Select is HIGH, the I1x inputs are selected. The data on the selected inputs appears at the outputs in true (noninverted) form. The device is the logic implementation of a 4-pole, 2position switch where the position of the switch is determined by the logic levels supplied to the Select input. The logic equations for the outputs are as follows: Output Select Data Enable Input Inputs OE S I0 I1 Z H X X X Z L H X L L L H X H H Za = OE • (11a • S + I0a • S) L L L X L Zb = OE • (11b • S + I0b • S) L L H X H Zc = OE • (11c • S + I0c • S) H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impedance Zd = OE • (11d • S + I0d • S) When the Output Enable (OE) is HIGH, the outputs are forced to a high impedance state. If the outputs are tied together, all but one device must be in the high impedance state to avoid high currents that would exceed the maximum ratings. Designers should ensure the Output Enable signals to 3-STATE devices whose outputs are tied together are designed so there is no overlap. Outputs Logic Diagram Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. www.fairchildsemi.com 2 Recommended Operating Conditions −0.5V to +7.0V Supply Voltage (VCC) DC Input Diode Current (IIK) VI = −0.5V −20 mA VI = VCC +0.5V +20 mA Supply Voltage (VCC) −0.5V to VCC + 0.5V DC Input Voltage (VI) VO = VCC +0.5V +20 mA 0V to VCC −40°C to +85°C Minimum Input Edge Rate (∆V/∆t) AC Devices DC Output Source ort VIN from 30% to 70% of VCC ±50 mA VCC @ 3.3V, 4.5V, 5.5V DC VCC or Ground Current 125 mV/ns Minimum Input Edge Rate (∆V/∆t) ±50 mA Per Output Pin (ICC or IGND) Storage Temperature (TSTG) 0V to VCC Operating Temperature (TA) −0.5V to VCC + 0.5V Sink Curren (IO) 4.5V to 5.5V Output Voltage (VO) −20 mA DC Output Voltage (VO) 2.0V to 6.0V ACT Input Voltage (VI) DC Output Diode Current (IOK) VO = −0.5V AC ACT Devices −65°C to +150°C VIN from 0.8V to 2.0V Junction Temperature (TJ) VCC @ 4.5V, 5.5V PDIP 140°C 125 mV/ns Note 1: Absolute maximum ratings are those values beyond which damage to the device may occur. The databook specifications should be met, without exception, to ensure that the system design is reliable over its power supply, temperature, and output/input loading variables. Fairchild does not recommend operation of FACT circuits outside databook specifications. DC Electrical Characteristics for AC Symbol VIH VIL VOH Parameter VCC TA = +25°C TA = −40°C to +85°C (V) Typ Guaranteed Limits Minimum HIGH Level 3.0 1.5 2.1 Voltage Input 4.5 2.25 3.15 3.15 5.5 2.75 3.85 3.85 Units Maximum LOW Level 3.0 1.5 0.9 0.9 Voltage Input 4.5 2.25 1.35 1.35 5.5 2.75 1.65 1.65 Minimum HIGH Level 3.0 2.99 2.9 2.9 Voltage Output 4.5 4.49 4.4 4.4 5.5 5.49 5.4 5.4 3.0 2.56 2.46 4.5 3.86 3.76 5.5 4.86 4.76 Conditions VOUT = 0.1V 2.1 V or VCC − 0.1V VOUT = 0.1V V or VCC − 0.1V V IOUT = −50 µA VIN = VIL or VIH VOL Maximum LOW Level 3.0 0.002 0.1 0.1 Voltage Output 4.5 0.001 0.1 0.1 5.5 0.001 0.1 0.1 3.0 0.36 0.44 4.5 0.36 0.44 IOH = −12 mA V IOH = −24 mA IOH = −24 mA (Note 2) V IOUT = 50 µA VIN = VIL or VIH IOL = 12 mA V IOL = 24 mA IOL = 24 mA (Note 2) 5.5 0.36 0.44 5.5 ± 0.1 ± 1.0 µA VI = VCC, GND Leakage Current 5.5 ±0.25 ±2.5 µA VI = VCC, GND IOLD Minimum Dynamic (Note 3) 5.5 75 mA VOLD = 1.65V Max IOHD Output Current 5.5 −75 mA VOHD = 3.85V Min ICC (Note 4) Maximum Quiescent Supply Current 5.5 40.0 µA VIN = VCC or GND IIN (Note 4) Maximum Input Leakage Current IOZ Maximum 3-STATE VI (OE) = VIL, VIH VO = VCC, GND 4.0 Note 2: All outputs loaded; thresholds on input associated with output under test. Note 3: Maximum test duration 2.0 ms, one output loaded at a time. Note 4: IIN and ICC @ 3.0V are guaranteed to be less than or equal to the respective limit @ 5.5V VCC. 3 www.fairchildsemi.com 74AC257 • 74ACT257 Absolute Maximum Ratings(Note 1) 74AC257 • 74ACT257 DC Electrical Characteristics for ACT Symbol Parameter VIL VOH TA = −40°C to +85°C (V) Typ 4.5 1.5 Input Voltage 5.5 1.5 2.0 2.0 Maximum LOW Level 4.5 1.5 0.8 0.8 Input Voltage 5.5 1.5 0.8 0.8 Minimum HIGH Level 4.5 4.49 4.4 4.4 Output Voltage 5.5 5.49 5.4 5.4 3.86 3.76 Minimum HIGH Level VIH TA = +25°C VCC Guaranteed Limits 2.0 2.0 Units V V Conditions VOUT = 0.1V or VCC − 0.1V VOUT = 0.1V or VCC − 0.1V V IOUT = −50 µA V IOH = −24 mA VIN = VIL or VIH 4.5 5.5 VOL IOH = −24 mA (Note 5) 4.86 4.76 Maximum LOW Level 4.5 0.001 0.1 0.1 Output Voltage 5.5 0.001 0.1 0.1 4.5 0.36 0.44 5.5 0.36 0.44 5.5 ±0.1 ±1.0 µA 5.5 ± 0.5 ± 5.0 µA V IOUT = 50 µA V IOL = 24 mA VIN = VIL or VIH IIN Maximum Input Leakage Current IOZ Maximum 3-STATE Leakage Current ICCT Maximum 5.5 VI = VCC, GND VI = VIL, VIH VO = VCC, GND VI = VCC − 2.1V 1.5 mA IOLD Dynamic Output Current 5.5 75 mA VOLD = 1.65V Max IOHD Minimum (Note 6) 5.5 −75 mA VOHD = 3.85V Min ICC Maximum Quiescent 40.0 µA ICC/Input Supply Current 0.6 IOL = 24 mA (Note 5) 5.5 4.0 VIN = VCC or GND Note 5: All outputs loaded; thresholds on input associated with output under test. Note 6: Maximum test duration 2.0 ms, one output loaded at a time. AC Electrical Characteristics for AC Symbol tPLH tPHL tPLH tPHL tPZH tPZL tPHZ tPLZ Parameter VCC TA = +25°C (V) CL = 50 pF CL = 50 pF (Note 7) Min Propagation Delay 3.3 1.5 5.0 8.5 1.0 9.0 In to Zn 5.0 1.5 4.0 6.0 1.0 7.0 Propagation Delay 3.3 1.5 6.0 8.5 1.0 9.0 In to Zn 5.0 1.5 4.5 6.0 1.0 7.0 Propagation Delay 3.3 1.5 7.0 10.5 1.5 11.5 S to Zn 5.0 1.5 5.0 7.5 1.0 8.5 Propagation Delay 3.3 1.5 7.5 10.5 1.5 11.5 S to Zn 5.0 1.5 5.5 7.5 1.0 8.5 Output Enable Time Output Enable Time Output Disable Time Output Disable Time Max Min 3.3 1.5 6.5 9.5 1.0 10.5 1.5 5.0 7.5 1.0 8.5 3.3 1.5 5.5 9.0 1.0 10.0 5.0 1.5 5.0 8.5 1.0 9.5 3.3 1.5 5.5 10.0 1.0 11.0 5.0 1.5 5.0 9.0 1.0 10.0 3.3 1.5 5.5 9.0 1.0 10.0 5.0 1.5 5.0 8.0 1.0 9.0 Voltage Range 5.0 is 5.0V ± 0.5V 4 Units Max 5.0 Note 7: Voltage Range 3.3 is 3.0V ± 0.3V www.fairchildsemi.com Typ TA = −40°C to +85°C ns ns ns ns ns ns ns ns Symbol tPLH Parameter Propagation Delay In to Zn tPHL Propagation Delay In to Zn tPLH Propagation Delay S to Zn tPHL Propagation Delay S to Zn VCC TA = +25°C (V) CL = 50 pF TA = −40°C to +85°C CL = 50 pF Units (Note 8) Min Typ Max Min Max 5.0 1.5 5.0 7.0 1.0 7.5 ns 5.0 2.0 6.0 7.5 1.5 8.5 ns 5.0 2.0 7.0 9.5 1.5 10.5 ns 5.0 2.5 7.0 10.5 2.0 11.5 ns ns tPZH Output Enable Time 5.0 2.0 6.0 8.0 1.5 9.0 tPZL Output Enable Time 5.0 2.0 6.0 8.0 1.5 9.0 ns tPHZ Output Disable Time 5.0 2.5 6.5 9.0 1.5 10.0 ns tPLZ Output Disable Time 5.0 2.0 6.0 7.5 1.5 8.5 ns Note 8: Voltage Range 5.0 is 5.0V ± 0.5V Capacitance Typ Units CIN Symbol Input Capacitance Parameter 4.5 pF VCC = OPEN CPD Power Dissipation Capacitance 50.0 pF VCC = 5.0V 5 Conditions www.fairchildsemi.com 74AC257 • 74ACT257 AC Electrical Characteristics for ACT 74AC257 • 74ACT257 Physical Dimensions inches (millimeters) unless otherwise noted 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body Package Number M16A www.fairchildsemi.com 6 74AC257 • 74ACT257 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M16D 7 www.fairchildsemi.com 74AC257 • 74ACT257 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Package Number MTC16 www.fairchildsemi.com 8 74AC257 • 74ACT257 Quad 2-Input Multiplexer with 3-STATE Outputs Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide Package Number N16E Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. www.fairchildsemi.com 9 www.fairchildsemi.com