Philips Semiconductors 3-to-8 line decoder/demultiplexer; inverting Product specification 74LVC138A ene eee errr erence eee ee FEATURES Wide supply voltage range of 1.2 to 3.6 V in accordance with JEDEC standard no. 8-1A @ |nputs accept voltages up to 5.5 V @ CMOS lower power consumption Direct interface with TTL levels Demultiplexing capability Multiple input enable for easy expansion ideal for memory chip select decoding Active LOW mutually exclusive outputs Output drive capability 50 transmission lines at 85C DESCRIPTION The 74LVC138A is a low-voitage, low-power, high-performance Si-gate CMOS device, superior to most advanced CMOS compatible TTL famities. The 74LVC138A accepts three binary weighted address inputs (Ao, 41, Ag) and when enabled, provides 8 mutually exclusive active LOW outputs (Yo to ). The 74LVC138A features three enable inputs: two active LOW (E, and E) and one active HIGH (E3). Every output will be HIGH unless E, and E> are LOW and E, is HIGH. This multiple enable function allows easy parallel expansion of the 74LV 138A to a 1-0f-32 (5 lines to 32 lines) decoder with just four TAL 1384 ICs and one inverter. The 74LV138A can be used as an eight output demultiplexer by using one of the active LOW enable inputs as the data input and the remaining enable inputs as strobes. Unused enable inputs must be permanently tied to their apprapriate active HIGH or LOW state. QUICK REFERENCE DATA GND = 0 V; Tamp = 25C; ty = tp $ 2.5 ns SYMBOL PARAMETER CONDITIONS TYPICAL UNIT Propagation delay C,, = 50 pF; teuifeLy An to Yn, Veo =3.3V 3.5 ns 3 to Yn, En to Yn 3.5 Cc Input capacitance .0 pF Power dissipation capacitance per Veco =3.3V pp package Notes 1 and 2 44 pF NOTES: 1. Cpp is used to determine the dynamic power dissipation (Pp in pW) Pp = Cpp x Voc? xf +3 (Cy x Vec? x fo) where: f, = input frequency in MHz; C,, = output load capacity in pF: fo = output frequency in MHz; Vcc = supply voltage in V; (CL x Voc? x fy) = sum of the outputs. 2. The condition is Vj = GND to Vcc ORDERING INFORMATION PACKAGES TEMPERATURE RANGE | OUTSIDE NORTH AMERICA | NORTH AMERICA PKG. DWG. # 16-Pin Plastic SO -40C to +85C 74LVC138A D 74LVC138A D SOT109-1 16-Pin Plastic SSOP Type I! 40C to +85C 74LVC138A DB 74LVC 138A DB SOT338-1 16-Pin Plastic TSSOP Type | 40C ta +85C 7ALVC138A PW T4LVC138APW DH SOT403-1 PIN CONFIGURATION LOGIC DIAGRAM 1 oO A Yq (O- 15 2 AY , 14 3- Yo O- 13 Y3 P 12 Ys, O-- 4 O 5 O- 10 5 Ez 5 Ey Yg P 9 Y; P- 7 SV00853 Sv00554 1998 Apr 28 523 853-1943 19308Philips Semiconductors Product specification 3-to-8 line decoder/demultiplexer; inverting 74LVC138A PIN DESCRIPTION FUNCTIONAL DIAGRAM PIN NUMBER | SYMBOL NAME AND FUNCTION 1,2,3 Ag to Ap Address inputs |_| 4,5 Ey, Ep Enable inputs (active LOW) lat |__| 6 Es Enable inputs (active HIGH) ar |_| r110,8,7_ [Yete Yr | Outputs foe | octten ] BE 8 GND Ground (0 V) 16 Vec Positive supply voltage |_| LOGIC SYMBOL (IEEEAEC) i [~ E OK ag wo * Te! > | 1-0 ip ia tot +P 14 5 Esl ~~ rn svooss6 3-72 3m 12 374 a 4p am. 11 qh 11 at & | 5s 10 , nla] sR 10 3] 6 8 os ENS P- & ed | 7P 7 ge 7 7 ja) tor SV00555 FUNCTION TABLE INPUTS OUTPUTS E Ep E; Ao Ay Ap Yo ; 3 Ya Ys Ye > H x x xX x x H H H H H H H H x H x x x x H H H H H H H H X Xx L x xX x H H H H H H H H L L H L L L L H H H H H H H L L H H L L H L H H H H H H L L H Lb H L H H L H H H H H L L H H H L H H H L H H H H L L H L. L H H H H H L H H H L L H H L H H H H H H L H H C i H L H H H H H H H H L H L L H H H H H H H H H H H L NOTES: H = HIGH voltage Jevel L = LOW voltage level X = don't care 1998 Apr 28 $29Philips Semiconductors Product specification 3-to-8 line decoder/demultiplexer; inverting 74LVC138A RECOMMENDED OPERATING CONDITIONS LIMITS SYMBOL PARAMETER CONDITIONS UNIT MIN MAX Voc DC supply voltage (for max. speed performance) 2.7 3.6 V DC supply voltage (for low-voltage applications) 12 3.6 Vi DC input voltage range 6 55 Vv vo oc output voltage range; output HIGH or LOW state 0 Voc Vv DC input voltage range; output 3-State 0 5 Tame Operating free-air temperature range ~40 +85 ao) te ty Input rise and fall times vee : 2S e Foy 3 0 ns/V ABSOLUTE MAXIMUM RATINGS! In accordance with the Absolute Maximum Rating System (IEC 134). Voltages are referenced to GND (ground = OV). SYMBOL PARAMETER CONDITIONS RATING UNIT Voc DC supply voltage 0.5 to +6.5 Vv lik DC input diode current Vi< 0 ~50 mA vi DC input voltage Note 2 ~0.5 to +6.5 Vv lox DC output diode current Vo >Vec or Vg < 0 +50 mA DC output voltage; output HIGH or LOW Note 2 0.5 to Voc +0.5 Wvo DC input voltage; output 3-State Note 2 0.5 to 6.5 v lo DC output source or sink current Vo =0 to Voc +50 mA jenp: leg =| DC Voc or GND current + 100 mA Tstg Storage temperature range 65 to +150 6 Power dissipation per package Prot ~ plastic mini-pack (SO} above +70C derate linearly with 8 mW/K 500 mw ~ plastic shrink mini-pack (SSOP and TSSOP) above +60C derate linearly with 5.5 mW/K 500 NOTES: 1. Stresses beyond those listed 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 retiability. 2. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 1998 Apr 28 530Philips Semiconductors Product specification 3-to-8 line decoder/demultiplexer; inverting 74LVC138A DC ELECTRICAL CHARACTERISTICS Over recommended operating conditions. Voltages are referenced to GND (ground = OV). LIMITS SYMBOL PARAMETER TEST CONDITIONS Temp = -40C to +85C || UNIT MIN TYP? | MAX Voc = 1.2V Veco Vin HIGH tevel input voltage - Vv Vcc = 2.7 to 3.6V 2.0 Voc = 1.2V GND Vib LOW level input voltage Vv Voc = 2.7 to 3.6V 0.8 Voc = 2.7V; Vr = Vin or Viti lo = -12mA Voc ~0.5 Voc = 3.0V; V) = Viy or Viti lo = -100HA Voc -0.2 | Veco Vou HIGH level output voltage v Voc = 3.0V; Vy = Vix or Vit. Io = -12MA Voc ~ 0.6 Voc = 3.0V; V; = Vin or Vit; lo = ~24mA Veo-- 1.0 Voc = 2.7V; V, = Vin oF Vics lg = 12mA 0.40 Vot LOW level output voltage Voc = 3.0V; Vi = Vin or Viti fo = 100HA GND 0.20 Vv Voc = 3.0V; Vi = Vin oF Vit; lo = 24mA 0.55 I Input leakage current Voc = 3.6V; V, = 5.5V or GND +.0.4 +5 BA loc Quiescent supply current Voc = 3.6V; Vi = Voc or GND; Ig = 0 0.1 10 pA Alec rout phe quiescent supply current per | y_. - 2.7V to 3.6V: Vi = Veo ~0.6V: Ig = 0 5 | 500 | A NOTE: 1, All typical values are at Vcc = 3.3V and Tampy = 25C. AC CHARACTERISTICS GND = OV; 1, = tf < 2.5 ns; C_ = 50 pF; Ry = 5002; Tamp = -40C to +85C LIMITS SYMBOL PARAMETER WAVEFORM Veo = 3.3V +0.3V Voc = 2.7V UNIT MIN TYP! MAX MIN MAX touptpyy | Propagation delay Figure 1,3 15 35 5.8 15 68 ns A, to , P tion del: tpHu fen EytoY, fon delay Figure 1,3 15 3.6 5.8 15 68 ns tprutery |p opagation delay Figure 2, 3 15 3.5 5.8 15 68 ns nto Ya NOTE: 1. These typical values are at Veco = 3.3V and Tamb = 25C. 1998 Apr 28 531Philips Semiconductors Product specification 3-to-8 line decoder/demultiplexer; inverting 7ALVC138A AC WAVEFORMS TEST CIRCUIT Vu = 1.5 VatVoeco 2 2.7V Vu =0.5* Voc at Veg < 2.7 V Vor and Vox are the typical output voltage drop that occur with the output load. Voc vi PULSE INPUT GND Vou ~ * ,, ourpur SWITCH POSITION Test sy Veco vi You teLHteHL Open <27V Veo sv00s57 Figure 1. input (nA) to output (nY} propagation delays. 27-36V | BN S00903 Veco Figure 3. Load circuitry for switching times. Ey. 9 INPUT svo0558 Figure 2. 3-State enable and disable times. 1998 Apr 28 532