OCTA BUFFER/INE RIVER WIT 3-STATE S The SN54/S240, 241 and 244 are Octal Buffers and ine rivers designed to be employed as memory address drivers, clock drivers and bus-oriented transmitters/receivers which provide improved PC board density. ysteresis at Inputs to Improve Noise Margins 3-State Outputs rive Bus ines or Buffer Memory Address Registers Input Clamp iodes imit igh-speed Termination Effects SN54/S240 SN54/S241 SN54/S244 OCTA BUFFER/ INE RIVER WIT 3-STATE S OW POWER SCOTTKY OGIC AN CONNECTION IAGRAMS IP (TOP VIEW) SN54/ S240 1 J SUFFI CERAMIC CASE 732-03 1 N SUFFI PASTIC CASE 738-03 SN54/ S241 1 W SUFFI SOIC CASE 751-03 ORERING INFORMATION SN54SJ Ceramic SNSN Plastic SNSW SOIC SN54/ S244 FAST AN S TT ATA 5-387
SN54/S240 SN54/S241 SN54/S244 TRUT TABES SN54/ S240 1G, 2G SN54/ S244 1G, 2G 1G = IG Voltage evel = OW Voltage evel = Immaterial Z = IG Impedance SN54/ S241 2G GUARANTEE OPERATING RANGES Symbol Parameter Min Typ Max Unit VCC Supply Voltage 54 4.5 4.75 5.0 5.0 5.5 5.25 V TA Operating Ambient Temperature Range 54 55 0 25 25 5 70 C IO Output Current igh 54, 3.0 ma O 54 15 ma IO Output Current ow 54 24 ma FAST AN S TT ATA 5-388
SN54/S240 SN54/S241 SN54/S244 C CARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) imits Symbol Parameter Min Typ Max Unit Test Conditions VI Input IG Voltage 2.0 V VI Input OW Voltage 54 0.7 0.8 VT+ VT ysteresis 0.2 0.4 V VCC = MIN V Guaranteed Input IG Voltage for All Inputs Guaranteed Input OW Voltage for All Inputs VIK Input Clamp iode Voltage 0.65 1.5 V VCC = MIN, IIN = 18 ma VO VO Output IG Voltage Output OW Voltage 54, 2.4 3.4 V VCC = MIN, IO = 3.0 ma 54, 2.0 V VCC = MIN, IO = MA 54, 0.25 0.4 V IO = ma VCC = VCC MIN, VIN = VI or VI 0.35 0.5 V IO = 24 ma per Truth Table IOZ Output Off Current IG µa VCC = MA, VOUT = 2.7 V IOZ Output Off Current OW µa VCC = MA, VOUT = 0.4 V II Input IG Current µa VCC = MA, VIN = 2.7 V 0.1 ma VCC = MA, VIN = 7.0 V II Input OW Current 0.2 ma VCC = MA, VIN = 0.4 V IOS Output Short Circuit Current (Note 1) 40 225 ma VCC = MA Power Supply Current Total, Output IG 27 Total, Output OW S240 44 ICC S241/244 46 Total at IG Z S240 50 S241/244 54 Note 1: Not more than one output should be shorted at a time, nor for more than 1 second. ma VCC = MA AC CARACTERISTICS (TA = 25C, VCC = 5.0 V) imits Symbol Parameter Min Typ Max Unit Test Conditions tp tp Propagation elay, ata to Output S240 9.0 14 18 ns tp tp Propagation elay, ata to Output S241/ 244 tpz Output Enable Time to IG evel 15 23 ns tpz Output Enable Time to OW evel 30 ns 18 18 ns C = 45 pf, R = 667 Ω tpz Output isable Time from OW evel 15 25 ns C = 5.0 pf, tpz Output isable Time from IG evel 10 18 ns R = 667 Ω FAST AN S TT ATA 5-389
SN54/S240 SN54/S241 SN54/S244 AC WAVEFORMS Figure 1 Ω Figure 2 SWITC POSITIONS Figure 3 Figure 5 Figure 4 FAST AN S TT ATA 5-390
-A- 11 1 10 -B- P Case 751-03 W Suffix -Pin Plastic SO- (WIE) -T- G C K R 45 M F J Case 732-03 J Suffix -Pin Ceramic ual In-ine 11 1 10 A F G B C N K J M -A- 11 1 10 B C Case 738-03 N Suffix -Pin Plastic -T- G E F K N M J FAST AN S TT ATA 5-391
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