HD74AC138/HD74ACT138 1-of-8 Decoder/Demultiplexer REJ03D0248-0200Z (Previous ADE-205-368 (Z)) Rev.2.00 Jul.16.2004 Description The HD74AC138/HD74ACT138 is a high-speed 1-of-8 decoder/demultiplexer. This device is ideally suited for highspeed bipolar memory chip select address decoding. The multiple input enables allow parallel expansion to a 1-of-24 decoder using just three HD74AC138/HD74ACT138 devices or a 1-of-32 decoder using four HD74AC138/HD74ACT138 devices and one inverter. Features * Demultiplexing Capability * Multiple Input Enable for Easy Expansion * Active LOW Mutually Exclusive Outputs * Outputs Source/Sink 24 mA * HD74ACT138 has TTL-Compatible Inputs * Ordering Information: Ex. HD74AC138 Part Name HD74AC138AP Package Type Package Code Package Abbreviation Taping Abbreviation (Quantity) DIP-16 pin DP-16E, -16FV HD74AC138AFPEL SOP-16 pin (JEITA) P -- FP-16DAV FP EL (2,000 pcs/reel) HD74AC138ARPEL SOP-16 pin (JEDEC) FP-16DNV RP EL (2,500 pcs/reel) HD74AC138TELL T ELL(2,000 pcs/reel) TSSOP-16 pin TTP-16DAV Notes: 1. Please consult the sales office for the above package availability. 2. The packages with lead-free pins are distinguished from the conventional products by adding V at the end of the package code. Pin Arrangement A0 1 16 VCC A1 2 15 O0 A2 3 14 O1 E1 4 13 O2 E2 5 12 O3 E3 6 11 O4 O7 7 10 O5 GND 8 9 O6 (Top view) Rev.2.00, Jul.16.2004, page 1 of 9 HD74AC138/HD74ACT138 Logic Symbol A0 A1 A2 E1 E2 E3 O0 O1 O2 O3 O4 O5 O6 O7 Pin Names A0 to A2 E1 to E 2 E3 O0 to O 7 Address Inputs Enable Inputs Enable Input Outputs Functional Description The HD74AC138/HD74ACT138 high-speed 1-of-8 decoder/demultiplexer accepts three binary weighted inputs (A0, A1, A2) and, when enabled, provides eight mutually exclusive active-LOW outputs (O0 to O7). The HD74AC138/HD74ACT138 features three Enable inputs, two active-Low (E1, E2) and one active-High (E3). All outputs will be High unless E1 and E2 are Low and E3 is High. This multiple enabled function allows easy parallel expansion of the device to a 1-of-32 (5 lines to 32 lines) decoder with just four HD74AC138/HD74ACT138 devices and one inverter (See Figure a). The HD74AC138/HD74ACT138 can be used as an 8-output demultiplexer by using one of the active Low Enable inputs as the data input and the other Enable inputs as strobes. The Enables inputs which are not used must be permanently tied to their appropriate active-High or active-Low state. Truth Table Inputs E1 H X X X X X H H H H H H H H X X H X X L X X X X X X H H H H H H H H H H H H H H H H L L L L H H L H L L L L L H H L H H H H H H H H H H H H L L L L H H L H H H L L H H H H L H H L H H H H H H H H L L L L H H L H L L H H H H H H H H H H L H H L H H H H L L L L H H L H H H H H H H H H H H H H H H H H L H H L H : L : X : E2 Outputs E3 A0 A1 High Voltage Level Low Voltage Level Immaterial Rev.2.00, Jul.16.2004, page 2 of 9 O0 A2 O1 O2 O3 O4 O5 O6 O7 HD74AC138/HD74ACT138 Logic Diagram A2 A1 O7 A0 O6 E1 E2 E3 O5 O4 O3 O2 O1 O0 Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. Figure a: Expansion of 1-of-32 Decoding A0 A1 A2 O04 A3 A4 H 123 A0 A1 A2 E O0 O1 O2 O3 O4 O5 O6 O7 123 123 A0 A1 A2 A0 A1 A2 E O0 O1 O2 O3 O4 O5 O6 O7 123 E A0 A1 A2 O0 O1 O2 O3 O4 O5 O6 O7 E O0 O1 O2 O3 O4 O5 O6 O7 O31 O0 Absolute Maximum Ratings Item Symbol Ratings Unit Condition Supply voltage DC input diode current VCC IIK -0.5 to 7 -20 V mA VI 20 -0.5 to Vcc+0.5 mA V VI = Vcc+0.5V DC input voltage DC output diode current IOK -50 50 mA mA VO = -0.5V VO = Vcc+0.5V DC output voltage DC output source or sink current VO IO -0.5 to Vcc+0.5 50 V mA DC VCC or ground current per output pin Storage temperature ICC, IGND Tstg 50 -65 to +150 mA C Rev.2.00, Jul.16.2004, page 3 of 9 VI = -0.5V HD74AC138/HD74ACT138 Recommended Operating Conditions: HD74AC138 Item Symbol Ratings Unit Supply voltage Input and output voltage VCC VI, VO 2 to 6 0 to VCC V V Operating temperature Input rise and fall time (except Schmitt inputs) VIN 30% to 70% VCC Ta tr, tf -40 to +85 8 C ns/V Condition VCC = 3.0V VCC = 4.5 V VCC = 5.5 V DC Characteristics: HD74AC138 Item Input Voltage Symbol VIH VIL Output voltage VOH VOL Ta = 25C Vcc (V) 3.0 min. 2.1 typ. 1.5 max. -- Ta = -40 to +85C min. max. 2.1 -- 4.5 5.5 3.15 3.85 2.25 2.75 -- -- 3.15 3.85 -- -- 3.0 4.5 -- -- 1.50 2.25 0.9 1.35 -- -- 0.9 1.35 5.5 3.0 -- 2.9 2.75 2.99 1.65 -- -- 2.9 1.65 -- 4.5 5.5 4.4 5.4 4.49 5.49 -- -- 4.4 5.4 -- -- 3.0 4.5 2.58 3.94 -- -- -- -- 2.48 3.80 -- -- 5.5 3.0 4.94 -- -- 0.002 -- 0.1 4.80 -- -- 0.1 4.5 5.5 -- -- 0.001 0.001 0.1 0.1 -- -- 0.1 0.1 3.0 4.5 -- -- -- -- 0.32 0.32 -- -- 0.37 0.37 Unit V Condition VOUT = 0.1 V or VCC -0.1 V VOUT = 0.1 V or VCC -0.1 V V VIN = VIL or VIH IOUT = -50 A VIN = VIL or VIH IOH = -12 mA IOH = -24 mA IOH = -24 mA VIN = VIL or VIH IOUT = 50 A VIN = VIL or VIH IOL = 12 mA IOL = 24 mA Input leakage current IIN 5.5 5.5 -- -- -- -- 0.32 0.1 -- -- 0.37 1.0 A VIN = VCC or GND IOL = 24 mA Dynamic output current* IOLD IOHD 5.5 5.5 -- -- -- -- -- -- 86 -75 -- -- mA mA VOLD = 1.1 V VOHD = 3.85 V Quiescent supply current ICC 5.5 -- -- 8.0 -- 80 A VIN = VCC or ground *Maximum test duration 2.0 ms, one output loaded at a time. Recommended Operating Conditions: HD74ACT138 Supply voltage Item Symbol VCC 2 to 6 V Input and output voltage Operating temperature VI, VO Ta 0 to VCC -40 to +85 V C Input rise and fall time (except Schmitt inputs) VIN 0.8 to 2.0 V tr, tf 8 ns/V Rev.2.00, Jul.16.2004, page 4 of 9 Ratings Unit Condition VCC = 4.5V VCC = 5.5V HD74AC138/HD74ACT138 DC Characteristics: HD74ACT138 Item Input voltage Output voltage Symbol Ta = 25C VIH 4.5 min. 2.0 typ. 1.5 max. -- Ta = -40 to +85C min. max. 2.0 -- VIL 5.5 4.5 2.0 -- 1.5 1.5 -- 0.8 2.0 -- -- 0.8 VOH 5.5 4.5 -- 4.4 1.5 4.49 0.8 -- -- 4.4 0.8 -- 5.5 4.5 5.4 3.94 5.49 -- -- -- 5.4 3.80 -- -- 5.5 4.5 4.94 -- -- 0.001 -- 0.1 4.80 -- -- 0.1 5.5 4.5 -- -- 0.001 -- 0.1 0.32 -- -- 0.1 0.37 -- -- -- -- 0.32 0.1 -- -- 0.37 1.0 VOL VCC (V) Unit V Condition VOUT = 0.1 V or Vcc-0.1 V VOUT = 0.1 V or Vcc-0.1 V V VIN = VIL or VIH IOUT = -50 A VIN = VIL IOH = -24 mA IOH = -24 mA VIN = VIL or VIH IOUT = 50 A VIN = VIL IOL = 24 mA Input current IIN 5.5 5.5 A VIN = VCC or GND ICC/input current Dynamic output current* ICCT IOLD 5.5 5.5 -- -- 0.6 -- -- -- -- 86 1.5 -- mA mA VIN = VCC-2.1 V VOLD = 1.1 V IOHD ICC 5.5 5.5 -- -- -- -- -- 8.0 -75 -- -- 80 mA A VOHD = 3.85 V VIN = VCC or ground Quiescent supply current IOL = 24 mA *Maximum test duration 2.0 ms, one output loaded at a time. AC Characteristics: HD74AC138 Ta = +25C CL = 50 pF Ta = -40C to +85C CL = 50 pF tPLH VCC (V)*1 Min 3.3 1.0 1.0 Max 15.0 An to On Propagation delay tPHL 5.0 3.3 1.0 1.0 6.5 8.0 9.5 12.5 1.0 1.0 10.5 14.0 ns An to On Propagation delay tPLH 5.0 3.3 1.0 1.0 6.0 11.0 9.0 15.0 1.0 1.0 10.5 16.0 ns E1 or E 2 to On Propagation delay tPHL 5.0 3.3 1.0 1.0 8.0 9.5 11.0 13.5 1.0 1.0 12.0 15.0 ns tPLH 5.0 3.3 1.0 1.0 7.0 11.0 9.5 15.5 1.0 1.0 10.5 16.5 ns tPHL 5.0 3.3 1.0 1.0 8.0 8.5 11.0 13.0 1.0 1.0 12.5 14.0 ns 5.0 1.0 6.0 8.0 1.0 9.5 Item Propagation delay E1 or E 2 to On Propagation delay E3 to On Propagation delay Symbol E3 to On Note: 1. Voltage Range 3.3 is 3.3 V 0.3 V Voltage Range 5.0 is 5.0 V 0.5 V Rev.2.00, Jul.16.2004, page 5 of 9 Typ 8.5 Max 13.0 Min Unit ns HD74AC138/HD74ACT138 AC Characteristics: HD74ACT138 Ta = +25C CL = 50 pF Ta = -40C to +85C CL = 50 pF tPLH VCC (V)*1 Min 5.0 1.0 Typ 7.0 Max 10.5 1.0 Max 11.5 ns Propagation delay An to On Propagation delay E1 or E 2 to On tPHL 5.0 1.0 6.5 10.5 1.0 11.5 ns tPLH 5.0 1.0 8.0 11.5 1.0 12.5 ns Propagation delay E1 or E 2 to On Propagation delay E3 to On tPHL 5.0 1.0 7.5 11.5 1.0 12.5 ns tPLH 5.0 1.0 8.0 12.0 1.0 13.0 ns Propagation delay E3 to On tPHL 5.0 1.0 6.5 10.5 1.0 11.5 ns Item Propagation delay An to On Note: Symbol Min Unit 1. Voltage Range 5.0 is 5.0 V 0.5 V Capacitance Item Input capacitance Symbol CIN 4.5 pF VCC = 5.5 V Power dissipation capacitance CPD 60.0 pF VCC = 5.0 V Rev.2.00, Jul.16.2004, page 6 of 9 Typ Unit Condition HD74AC138/HD74ACT138 Package Dimensions As of January, 2003 Unit: mm 19.2 20.32 Max 9 6.3 7.4 Max 16 1 8 0.48 0.1 2.54 0.25 2.54 Min 5.06 Max 0.51 Min 1.3 0.89 7.62 + 0.1 0.25 - 0.05 0 - 15 Package Code JEDEC JEITA Mass (reference value) DP-16E Conforms Conforms 1.05 g Unit: mm 19.2 20.32 Max 9 6.3 7.4 Max 16 1 8 *0.48 0.08 2.54 Min 5.06 Max 2.54 0.25 1.3 0.51 Min 0.89 7.62 *0.25 0.06 0 - 15 *NI/Pd/AU Plating Rev.2.00, Jul.16.2004, page 7 of 9 Package Code JEDEC JEITA Mass (reference value) DP-16FV Conforms Conforms 1.05 g HD74AC138/HD74ACT138 As of January, 2003 Unit: mm 10.06 10.5 Max 9 1 8 1.27 *0.40 0.06 0.20 7.80 +- 0.30 1.15 0 - 8 0.10 0.10 0.80 Max *0.20 0.05 2.20 Max 5.5 16 0.70 0.20 0.15 0.12 M Package Code JEDEC JEITA Mass (reference value) *Ni/Pd/Au plating FP-16DAV -- Conforms 0.24 g As of January, 2003 Unit: mm 9.9 10.3 Max 9 1 8 0.635 Max *0.40 0.06 0.15 *0.20 0.05 1.27 0.11 0.14 +- 0.04 1.75 Max 3.95 16 0.10 6.10 +- 0.30 1.08 0 - 8 + 0.67 0.60 - 0.20 0.25 M *Ni/Pd/Au plating Rev.2.00, Jul.16.2004, page 8 of 9 Package Code JEDEC JEITA Mass (reference value) FP-16DNV Conforms Conforms 0.15 g HD74AC138/HD74ACT138 As of January, 2003 Unit: mm 4.40 5.00 5.30 Max 16 9 1 8 0.65 *0.20 0.05 1.0 0.13 M Rev.2.00, Jul.16.2004, page 9 of 9 *0.15 0.05 1.10 Max *Ni/Pd/Au plating 0.10 0.07 +0.03 -0.04 6.40 0.20 0.65 Max 0 - 8 0.50 0.10 Package Code JEDEC JEITA Mass (reference value) TTP-16DAV -- -- 0.05 g Sales Strategic Planning Div. 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