74LCX162244 Low voltage CMOS 16-bit bus buffer (3-state) with 5V tolerant inputs and outputs Features ■ 5V tolerant inputs and outputs ■ High speed: – tPD = 4.4ns (Max) at VCC = 3V ■ Power down protection on inputs and outputs ■ Symmetrical output impedance: – |IOH| = IOL = 12mA (Min) at VCC = 3V ■ PCI bus levels guaranteed at 12mA ■ Balanced propagation delays: – tPLH ≅ tPHL ■ 26Ω serie resistor in outputs ■ Operating voltage range: – VCC (Opr) = 2.0V to 3.6V ■ Pin and function compatible with 74 series 162244 ■ Latch-up performance exceeds 500mA (JESD 17) ■ ESD performance: – HBM > 2000V (MIL STD 883 method 3015); MM > 200V TSSOP48 Description The 74LCX162244 is a low voltage CMOS 16 bit bus buffer (non-inverted) fabricated with submicron silicon gate and double-layer metal wiring C2MOS technology. It is ideal for low power and high speed 3.3V applications; it can be interfaced to 5V signal environment for both inputs and outputs. Any nG output control governs four bus buffers. Output Enable input (nG) tied together gives full 16-bit operation. When nG is LOW, the outputs are on. When nG is HIGH, the output are in high impedance state. This device is designed to be used with 3 state memory address drivers, etc. The device circuits is including 26Ω series resistance in the outputs. These resistors permit to reduce line noise in high speed applications. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage. Order codes Part number Package Packaging 74LCX162244TTR TSSOP48 Tape and reel February 2007 Rev 4 1/15 www.st.com 15 Contents 74LCX162244 Contents 1 Logic symbols and I/O equivalent circuit . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 2.1 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Logic states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.1 4 Truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4.1 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 6 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 7 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2/15 74LCX162244 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 3/15 Pin settings 74LCX162244 2 Pin settings 2.1 Pin connection Figure 3. 4/15 Pin connection (top through view) 74LCX162244 2.2 Logic states Pin description Table 1. Pin description Pin N° Symbol 1 1G 2, 3, 5, 6 1Y1 to 1Y4 Data outputs 8, 9, 11, 12 2Y1 to 2Y4 Data outputs 13, 14, 16, 17 3Y1 to 3Y4 Data outputs 19, 20, 22, 23 4Y1 to 4Y4 Data outputs 24 4G Output enable input 25 3G Output enable input 30, 29, 27, 26 4A1 to 4A4 Data outputs 36, 35, 33, 32 3A1 to 3A4 Data outputs 41, 40, 38, 37 2A1 to 2A4 Data outputs 47, 46, 44, 43 1A1 to 1A4 Data outputs 48 2G 4, 10, 15, 21, 28, 34, 39, 45 GND Ground (0V) 7, 18, 31, 42 VCC Positive supply voltage 3 Logic states 3.1 Truth table Name and function Output enable input Output enable input Table 2. Truth table Inputs Note: Output G An Yn L L L L H H H X Z X : Do not care Z : High impedance 5/15 Maximum rating 4 74LCX162244 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 (OFF state) -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 4.1 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 (OFF state) 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) ± 12 mA IOH, IOL High or low level output current (VCC = 2.7V) ±8 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 6/15 74LCX162244 5 Electrical characteristics Electrical characteristics Table 5. DC specification Test condition Symbol Parameter VIH High level input voltage VIL Low level input voltage Value -40 to 85 °C VCC (V) Min Unit Max 2.0 V 2.7 to 3.6 VOH High level output voltage 0.8 2.7 to 3.6 IO = -100 µA VCC-0.2 2.7 IO = -8 mA 2.0 IO = -6 mA 2.4 IO = -12 mA 2.0 3.0 VOL Low level output voltage V 2.7 to 3.6 IO = 100 µA 0.2 2.7 IO = 8 mA 0.6 IO = 6 mA 0.55 IO = 12 mA 0.8 VI = 0 to 5.5V ±5 µA 0 VI or VO = 5.5V 10 µA VI = VIH or VIL VO = 0 to VCC ±5 µA VI = VCC or GND 20 VI or VO= 3.6 to 5.5V ± 20 VIH = VCC - 0.6V 500 3.0 II V Input leakage current 2.7 to 3.6 Ioff Power OFF leakage current IOZ High impedance output leakage current 2.7 to 3.6 ICC Quiescent supply current 2.7 to 3.6 ∆ICC ICC incr. per Input 2.7 to 3.6 V 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. 7/15 Electrical characteristics 74LCX162244 Table 7. AC electrical characteristics Test Condition Symbol Parameter tPLH tPHL Propagation delay time tPZL tPZH Output enable time tPLZ tPHZ Output disable time tOSLH tOSHL Output to output skew time (1) (2) VCC (V) Value CL (pF) RL (Ω) ts = tr (ns) 50 500 2.5 2.7 3.0 to 3.6 2.7 50 500 2.7 500 50 500 Max 1.5 5.6 1.5 4.4 1.5 6.3 1.5 5.9 1.5 6.3 1.5 5.9 Unit ns ns 2.5 3.0 to 3.6 3.0 to 3.6 Min 2.5 3.0 to 3.6 50 -40 to 85 °C ns 2.5 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 CIN Parameter Value TA = 25 °C VCC (V) Min Typ Unit Max Input capacitance 4 pF COUT Output capacitance 10 pF CPD Power dissipation capacitance (1) 50 pF 3.3 fIN = 10MHz VIN = 0 or VCC 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/16 (per circuit) 8/15 74LCX162244 6 Test circuit Test circuit Figure 4. Test circuit Figure 5. Test circuit Test Switch tPLH, tPHL Open tPZL, tPLZ 6V tPZH, tPHZ GND CL = 50pF or equivalent (includes jig and probe capacitance) RL = R1 = 500Ω or equivalent RT = ZOUT of pulse generator (typically 50Ω) 9/15 Waveforms 7 10/15 74LCX162244 Waveforms Figure 6. Propagation delays (f = 1MHz; 50% duty cycle) Figure 7. Output enable and disable time (f = 1MHz; 50% duty cycle) 74LCX162244 8 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 11/15 Package mechanical data 74LCX162244 TSSOP48 MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. A MIN. TYP. 1.2 A1 0.05 0.047 0.15 A2 MAX. 0.002 0.006 0.9 0.035 b 0.17 0.27 0.0067 0.011 c 0.09 0.20 0.0035 0.0079 D 12.4 12.6 0.488 0.496 E 8.1 BSC E1 6.0 0.318 BSC 6.2 e 0.236 0.5 BSC 0.244 0.0197 BSC K 0° 8° 0° 8° L 0.45 0.75 0.018 0.030 A A2 A1 b K e L E c D E1 PIN 1 IDENTIFICATION 1 7065588D 12/15 74LCX162244 Package mechanical data Tape & Reel TSSOP48 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 30.4 0.519 1.197 Ao 8.7 8.9 0.343 0.350 Bo 13.1 13.3 0.516 0.524 Ko 1.5 1.7 0.059 0.067 Po 3.9 4.1 0.153 0.161 P 11.9 12.1 0.468 0.476 13/15 Revision history 9 74LCX162244 Revision history Table 9. Revision history 14/15 Date Revision Changes 15-Sep-2004 3 Ordering Codes Revision - pag. 1. 06-Feb-2007 4 Document reformatted, temperature ranges updated 74LCX162244 Please Read Carefully: Information in this document is provided solely in connection with ST products. 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