74LCX139 Low voltage CMOS Dual 2 to 4 decoder / demultiplexer Features ■ 5V tolerant inputs ■ High speed: – tPD = 6.2ns (Max) at VCC = 3V ■ Power down protection on inputs and outputs ■ Symmetrical output impedance: – |IOH| = IOL = 24mA (Min) at VCC = 3V ■ PCI bus levels guaranteed at 24mA ■ Balanced propagation delays: – tPLH ≅ tPHL SO-16 TSSOP16 Description The 74LCX139 is a low voltage CMOS dual 2 to 4 line Decoder / Demultiplexer fabricated with submicron silicon gate and double-layer metal wiring C2MOS technology. ■ Operating voltage range: – VCC (Opr) = 2.0V to 3.6V ■ Pin and function compatible with 74 series 139 ■ Latch-up performance exceeds 500mA (JESD 17) ■ ESD performance: – HBM > 2000V (MIL STD 883 method 3015); MM > 200V It is ideal for low power and high speed 3.3V applications; it can be interfaced to 5V signal environment for inputs. The active low enable input can be used for gating or as a data input for demultiplexing applications. While the enable input is held high, all four outputs are high independently of the other inputs. It has same speed performance at 3.3V than 5V AC/ACT family, combined with a lower power consumption. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage. Order codes July 2006 Part number Package Packaging 74LCX139MTR SO-16 Tape and reel 74LCX139TTR TSSOP16 Tape and reel Rev 4 1/17 www.st.com 17 Contents 74LCX139 Contents 1 Logic symbols and I/O equivalent circuit . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 2.1 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.3 Truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.4 Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.1 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 6 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2/17 74LCX139 1 Logic symbols and I/O equivalent circuit Logic symbols and I/O equivalent circuit Figure 1. IEC logic symbols Figure 2. Input and output equivalent circuit 3/17 Pin settings 74LCX139 2 Pin settings 2.1 Pin connection Figure 3. 2.2 Pin connection (top through view) Pin description Table 1. Pin description 4/17 Pin N° Symbol Name and function 1, 15 1G, 2G Enable inputs 2, 3 1A, 1B Address inputs 4, 5, 6, 7 1Y0 to 1Y3 Outputs 12, 11, 10, 9 2Y0 to 2Y3 Outputs 14, 13 2A, 2B 8 GND Ground (0V) 16 VCC Positive supply voltage Address inputs 74LCX139 2.3 Pin settings Truth table Table 2. Truth table Inputs Outputs Enable Select G B A Y0 Y1 Y2 Y3 H X X H H H H L L L L H H H L L H H L H H L H L H H L H L H H H H H L Note: X : Do not care 2.4 Logic diagram Figure 4. Note: Logic diagram This logic diagram has not to be used to estimate propagation delays 5/17 Maximum rating 3 74LCX139 Maximum rating stressing the device above the rating listed in the “absolute maximum ratings” table may cause permanent damage to the device. these are stress ratings only and operation of the device at these or any other conditions above those indicated in the operating sections of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. refer also to the STMicroelectronics sure program and other relevant quality documents. Table 3. Absolute maximum ratings Symbol Value Unit Supply voltage -0.5 to +7.0 V VI DC input voltage -0.5 to +7.0 V VO DC output voltage (VCC = 0V) -0.5 to +7.0 V VO DC output voltage (high or low state) (1) -0.5 to VCC + 0.5 V IIK DC input diode current -50 mA IOK DC output diode current (2) -50 mA IO DC output current ± 50 mA ICC DC supply current per supply pin ± 100 mA IGND DC ground current per supply pin ± 100 mA Tstg Storage temperature -65 to +150 °C 300 °C Value Unit 2.0 to 3.6 V VCC TL Parameter Lead temperature (10 sec) 1. IO absolute maximum rating must be observed 2. VO < GND 3.1 Recommended operating conditions Table 4. Recommended operating conditions Symbol VCC Parameter Supply voltage (1) VI Input voltage 0 to 5.5 V VO Output voltage (VCC = 0V) 0 to 5.5 V VO Output voltage (high or low state) 0 to VCC V IOH, IOL High or low level output current (VCC = 3.0 to 3.6V) ± 24 mA IOH, IOL High or low level output current (VCC = 2.7V) ± 12 mA -40 to 85 °C 0 to 10 ns/V Top dt/dv Operating temperature Input rise and fall time (2) 1. Truth table guaranteed: 1.5V to 3.6V 2. VIN from 0.8V to 2V at VCC = 3.0V 6/17 74LCX139 4 Electrical characteristics Electrical characteristics Table 5. DC specifications Test condition Symbol Parameter VIH High level input voltage VIL Low level input voltage VOH -40 to 85°C VCC (V) Min Unit Max 2.0 V 2.7 to 3.6 0.8 2.7 to 3.6 IO=-100 µA VCC-0.2 2.7 IO=-12 mA 2.2 IO=-18 mA 2.4 IO=-24 mA 2.2 High level output voltage 3.0 VOL Value V 2.7 to 3.6 IO=100 µA 0.2 2.7 IO=12 mA 0.4 IO=16 mA 0.4 IO=24 mA 0.55 Low level output voltage 3.0 V V II Input leakage current 2.7 to 3.6 VI = 0 to 5.5V ±5 µA Ioff Power OFF leakage current 0 VI or VO = 5.5V 10 µA Quiescent supply current VI = VCC or GND 10 ICC VI or VO= 3.6 to 5.5V ± 10 VIH = VCC - 0.6V 500 ∆ICC I incr. per Input 2.7 to 3.6 2.7 to 3.6 µA µA Table 6. Dynamic switching characteristics Test condition Symbol VOLP VOLV Parameter Dynamic low level quiet output (1) TA = 25 °C VCC (V) 3.3 Value Min CL = 50pF VIL = 0V, VIH = 3.3V Typ Unit Max 0.8 V -0.8 1. Number of outputs defined as "n". Measured with "n-1" outputs switching from HIGH to LOW or LOW to HIGH. The remaining output is measured in the LOW state. 7/17 Electrical characteristics 74LCX139 Table 7. AC electrical characteristics Test condition Symbol Parameter tPLH tPHL Propagation Delay Time A, B to Y tPLH tPHL Propagation Delay Time G to Y tOSLH tOSHL Output To Output Skew Time (1) (2) Value VCC (V) CL (pF) RL (Ω) ts = tr (ns) 2.7 50 500 2.5 -40 to 85 °C Min 1.0 2.7 50 500 2.5 1.0 50 500 2.5 ns 6.2 5.8 3.0 to 3.6 3.0 to 3.6 Max 7.3 3.0 to 3.6 Unit ns 5.3 1.0 ns 1. Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switching in the same direction, either HIGH or LOW (tOSLH = | tPLHm - tPLHn|, tOSHL = | tPHLm - tPHLn|) 2. Parameter guaranteed by design Table 8. Capacitive characteristics Test condition Symbol Parameter Value TA = 25 °C VCC (V) Min Typ Unit Max CIN Input capacitance 3.3 VIN = 0 to VCC 6 pF CPD Power dissipation capacitance (1) 3.3 fIN = 10MHz VIN = 0 or VCC 26 pF 1. CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC 8/17 74LCX139 5 Test circuit Test circuit Figure 5. Test circuit CL = 50pF or equivalent (includes jig and probe capacitance) RL = 500Ω or equivalent RT = ZOUT of pulse generator (typically 50Ω) 9/17 Waveforms 6 10/17 74LCX139 Waveforms Figure 6. Propagation delay for inverting outputs (f = 1MHz; 50% duty cycle) Figure 7. Propagation delay for non-inverting outputs (f = 1MHz; 50% duty cycle) 74LCX139 7 Package mechanical data Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a Lead-free second level interconnect . The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com 11/17 Package mechanical data 74LCX139 SO-16 MECHANICAL DATA DIM. mm. MIN. TYP A a1 inch MAX. MIN. TYP. 1.75 0.1 0.068 0.25 a2 0.004 0.010 0.46 0.013 0.018 0.25 0.007 1.64 b 0.35 b1 0.19 C MAX. 0.063 0.5 0.010 0.019 c1 45° (typ.) D 9.8 10 0.385 0.393 E 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 8.89 0.350 F 3.8 4.0 0.149 0.157 G 4.6 5.3 0.181 0.208 L 0.5 1.27 0.019 0.050 M S 0.62 0.024 8° (max.) 0016020D 12/17 74LCX139 Package mechanical data TSSOP16 MECHANICAL DATA mm. inch DIM. MIN. TYP A MAX. MIN. TYP. MAX. 1.2 A1 0.05 A2 0.8 b 0.047 0.15 0.002 0.004 0.006 1.05 0.031 0.039 0.041 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.0079 D 4.9 5 5.1 0.193 0.197 0.201 E 6.2 6.4 6.6 0.244 0.252 0.260 E1 4.3 4.4 4.48 0.169 0.173 0.176 1 e 0.65 BSC K 0˚ L 0.45 A 0.60 0.0256 BSC 8˚ 0˚ 0.75 0.018 8˚ 0.024 0.030 A2 A1 b e K c L E D E1 PIN 1 IDENTIFICATION 1 0080338D 13/17 Package mechanical data 74LCX139 Tape & Reel SO-16 MECHANICAL DATA mm. inch DIM. MIN. A MAX. MIN. 330 13.2 TYP. MAX. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 14/17 TYP 0.504 22.4 0.519 0.882 Ao 6.45 6.65 0.254 0.262 Bo 10.3 10.5 0.406 0.414 Ko 2.1 2.3 0.082 0.090 Po 3.9 4.1 0.153 0.161 P 7.9 8.1 0.311 0.319 74LCX139 Package mechanical data Tape & Reel TSSOP16 MECHANICAL DATA mm. inch DIM. MIN. A TYP MAX. MIN. 330 MAX. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 TYP. 0.504 22.4 0.519 0.882 Ao 6.7 6.9 0.264 0.272 Bo 5.3 5.5 0.209 0.217 Ko 1.6 1.8 0.063 0.071 Po 3.9 4.1 0.153 0.161 P 7.9 8.1 0.311 0.319 15/17 Revision history 8 74LCX139 Revision history Table 9. Revision history 16/17 Date Revision Changes 15-Sep-2004 3 Ordering Codes Revision - pag. 1. 27-Jul-2006 4 New template, temperature ranges updated 74LCX139 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. 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