HD74ALVC16834 18-bit Universal Bus Driver with 3-state Outputs and Inverted Latch Enable ADE-205-216D (Z) 5th. Edition December 1999 Description The HD74ALVC16834 is an 18-bit universal bus driver designed for 2.3 V to 3.6 V VCC operation. Data flow from A to Y is controlled by output enable (OE). The device operates in the transparent mode when the latch enable (LE) input is low. The A data is latched if the clock (CLK) input is held at a high or low logic level. If LE is high, the A data is stored in the latch/flip flop on the low to high transition of the CLK. When OE is high, the outputs are in the high impedance state. To ensure the high impedance state during power up or power down, OE should be tied to V CC through a pullup registor; the minimum value of the registor is determined by the current sinking capability of the driver. Features • Meets “PC SDRAM registered DIMM design support document, Rev. 1.2” • Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25°C) • Typical VOH undershoot > 2.0 V (@VCC = 3.3 V, Ta = 25°C) • High output current ±24 mA (@V CC = 3.0 V) HD74ALVC16834 Function Table Inputs OE LE CLK A Output Y H X X X Z L L X L L L L X H H L H ↑ L L L H ↑ H H L H H X Y0 *1 L H L X Y0 *2 H: L: X: Z: ↑: Notes: 2 High level Low level Immaterial High impedance Low to high transition 1. Output level before the indicated steady-state input conditions were established, provided that CLK was high before LE went low. 2. Output level before the indicated steady-state input conditions were established. HD74ALVC16834 Pin Arrangement NC 1 56 GND NC 2 55 NC Y1 3 54 A1 53 GND GND 4 Y2 5 52 A2 Y3 6 51 A3 50 VCC VCC 7 Y4 8 49 A4 Y5 9 48 A5 Y6 10 47 A6 46 GND GND 11 Y7 12 45 A7 Y8 13 44 A8 Y9 14 43 A9 Y10 15 42 A10 Y11 16 41 A11 Y12 17 40 A12 GND 18 39 GND Y13 19 38 A13 Y14 20 37 A14 Y15 21 36 A15 VCC 22 35 VCC Y16 23 34 A16 Y17 24 33 A17 GND 25 32 GND Y18 26 31 A18 OE 27 30 CLK LE 28 29 GND (Top view) 3 HD74ALVC16834 Absolute Maximum Ratings Item Symbol Ratings Unit VCC –0.5 to 4.6 V VI –0.5 to 4.6 V VO –0.5 to VCC+0.5 V Input clamp current I IK –50 mA VI < 0 Output clamp current I OK ±50 mA VO < 0 or VO > VCC Continuous output current IO ±50 mA VO = 0 to VCC VCC, GND current / pin I CC or IGND ±100 mA Maximum power dissipation at Ta = 55°C (in still air) *3 PT 1 W Storage temperature range Tstg –65 to 150 °C Supply voltage range Input voltage range *1 Output voltage range *1, 2 Conditions TSSOP Stresses beyond those listed under “absolute maximum ratings” 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 condition” is not implied. Exposure to absolutemaximum-rated conditions for extended periods may affect device reliability. Notes: 1. The input and output negative-voltage ratings may be exceeded if the input and output clamp current ratings are observed. 2. The input and output positive-voltage ratings may be exceeded up to 4.6 V if the input and output clamp-current ratings are observed. 3. The maximum power dissipation is calculated using a junction temperature of 150°C and board trace length of 750 mils. Recommended Operating Conditions Item Symbol Min Max Unit Supply voltage VCC 2.3 3.6 V Input voltage VI 0 VCC V Output voltage VO 0 VCC V High-level output current I OH — –12 mA — –12 VCC = 2.7 V — –24 VCC = 3.0 V — 12 — 12 VCC = 2.7 V — 24 VCC = 3.0 V Low-level output current I OL mA Input transition rise or fall rate ∆t/∆v 0 10 ns/V Operating free-air temperature Ta –40 85 °C Note: Unused or floating control pins must be held high or low. 4 Conditions VCC = 2.3 V VCC = 2.3 V HD74ALVC16834 Logic Diagram OE CLK LE A1 27 30 28 54 1D C1 CLK 3 Y1 To seventeen other channels 5 HD74ALVC16834 Electrical Characteristics Ta = –40 to 85°C Item Symbol VCC (V) Min Max Unit Test Conditions Input voltage VIH 2.3 to 2.7 1.7 — V 2.7 to 3.6 2.0 — 2.3 to 2.7 — 0.7 2.7 to 3.6 — 0.8 2.3 to 3.6 VCC–0.2 — 2.3 2.0 — I OH = –6 mA, VIH = 1.7 V 2.3 1.7 — I OH = –12 mA, VIH = 1.7 V 2.7 2.2 — I OH = –12 mA, VIH = 2.0 V 3.0 2.4 — I OH = –12 mA, VIH = 2.0 V 3.0 2.0 — I OH = –24 mA, VIH = 2.0 V 2.3 to 3.6 — 0.2 2.3 — 0.4 I OL = 6 mA, VIL = 0.7 V 2.3 — 0.7 I OL = 12 mA, VIL = 0.7 V 2.7 — 0.4 I OL = 12 mA, VIL = 0.8 V 3.0 — 0.55 I OL = 24 mA, VIL = 0.8 V VIL Output voltage VOH VOL V V V I OH = –100 µA I OL = 100 µA Input current I IN 3.6 — ±5.0 µA VIN = VCC or GND Off state output current I OZ 3.6 — ±10 µA VOUT = VCC or GND Quiescent supply current I CC 3.6 — 40 µA VIN = VCC or GND 3.0 to 3.6 — 750 µA One input at (V CC–0.6)V, other inputs at V CC or GND ∆I CC 6 HD74ALVC16834 Switching Characteristics (Ta = –40 to 85°C) Item Symbol VCC (V) Min Typ Max Unit Maximum clock f max 2.5±0.2 150 — — MHz 2.7 150 — — 3.3±0.3 150 — — t PLH 2.5±0.2 1.0 — 4.2 t PHL 2.7 — — 4.2 3.3±0.3 1.0 — 3.6 2.5±0.2 1.4 — 5.8 2.7 — — 5.5 3.3±0.3 1.5 — 4.7 2.5±0.2 1.4 — 5.5 2.7 — — 5.2 3.3±0.3 1.5 — 4.5 t ZH 2.5±0.2 1.4 — 5.5 t ZL 2.7 — — 5.6 3.3±0.3 1.5 — 4.6 t HZ 2.5±0.2 1.0 — 4.0 t LZ 2.7 — — 4.3 3.3±0.3 1.8 — 3.9 3.3 3.0 4.5 7.0 3.3 3.0 6.0 9.0 3.3 3.0 7.0 9.0 frequency Propagation delay time Output enable time Output disable time Input capacitance Output capacitance CIN CO ns From (Input) To (Output) A Y LE Y CLK Y ns OE Y ns OE Y pF Control inputs Data inputs pF Y ports 7 HD74ALVC16834 Switching Characteristics (Ta = –40 to 85°C) (cont) Item Symbol VCC (V) Setup time t su Hold time th Pulse width tw Min Typ Max Unit From (Input) 2.5±0.2 2.1 — — ns Data before CLK↑ 2.7 2.1 — — 3.3±0.3 1.7 — — 2.5±0.2 1.2 — — Data before LE↑ 2.7 1.6 — — CLK “H” 3.3±0.3 1.3 — — 2.5±0.2 1.4 — — Data before LE↑ 2.7 1.5 — — CLK “L” 3.3±0.3 1.2 — — 2.5±0.2 0.6 — — 2.7 0.6 — — 3.3±0.3 0.7 — — 2.5±0.2 0.8 — — Data after LE↑ 2.7 0.8 — — CLK “H” or “L” 3.3±0.3 0.9 — — 2.5±0.2 3.3 — — 2.7 3.3 — — 3.3±0.3 3.3 — — 2.5±0.2 3.3 — — 2.7 3.3 — — 3.3±0.3 3.3 — — ns Data after CLK↑ LE “L” ns CLK “H” or “L” Switching Characteristics (Ta = 0 to 85°C) Item Symbol VCC (V) *1 Propagation CL=0pF delay time CL=50pF CL=0pF Typ Max Unit FROM (Input) TO (Output) t PLH , t PHL 3.3±0.165 0.9 — 2.0 ns A Y 3.3±0.165 1.0 — 4.5 3.3±0.165 1.5 — 3.0 CLK Y 3.3±0.165 1.7 — 4.5 3.3±0.165 1.7 — 4.8 CLK, A Y 3.3±0.165 1.0 — 2.5 *1 CL=50pF Output rise / fall time *1, 2 CL=50pF t SSO CL=50pF t TLH, tTHL Min *1 Notes: 1. This parameter is characterized but not tested. 2. t SSO : Simultaneous switching output time. 8 volts/ ns Y HD74ALVC16834 Operating Characteristics (Ta = 25°C) Item Symbol VCC = 2.5±0.2 V VCC = 3.3±0.3 V Typ Typ Power dissipation Outputs enable Cpd 22.0 24.5 capacitance 5.0 6.0 Outputs disable Unit Test Conditions pF CL = 0, f = 10 MHz Test Circuit See under table 500 Ω S1 OPEN GND *1 CL 500 Ω Load Circuit for Outputs Symbol t PLH / t PHL t su / t h / t w t ZH/ t HZ t ZL / t LZ CL Note: 1. Vcc=2.5±0.2V Vcc=2.7V, 3.3±0.3V OPEN OPEN GND GND 2 × VCC 30 pF 6.0 V 50 pF CL includes probe and jig capacitance. 9 HD74ALVC16834 Waveforms – 1 tr tf 90 % Input VIH 90 % Vref Vref 10 % 10 % GND t PHL t PLH VOH Output Vref Vref VOL Waveforms – 2 tr VIH 90 % Vref Timing Input 10 % tsu GND th VIH Data Input Vref Vref GND tw VIH Input Vref Vref GND 10 HD74ALVC16834 Waveforms – 3 tf tr Output Control VIH 90 % 90 % Vref Vref 10 % t ZL 10 % GND t LZ ≈VOH1 Vref Waveform - A t ZH Waveform - B Vref1 VOL t HZ VOH Vref2 Vref ≈VOL1 TEST VIH Vref Vref1 Vref2 VOH1 VOL1 Notes: 1. 2. 3. 4. Vcc=2.5±0.2V Vcc=2.7V, 3.3±0.3V VCC 2.7 V 1/2 VCC 1.5 V VOL +0.15 V VOL +0.3 V VOH–0.15 V VOH–0.3 V VCC 3.0 V GND GND All input pulses are supplied by generators having the following characteristics : PRR ≤ 10 MHz, Zo = 50 Ω, t r ≤ 2.0 ns, tf ≤ 2.0 ns. (VCC = 2.5±0.2 V) PRR ≤ 10 MHz, Zo = 50 Ω, t r ≤ 2.5 ns, tf ≤ 2.5 ns. (VCC = 2.7 V, 3.3±0.3 V) Waveform–A is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform–B is for an output with internal conditions such that the output is high except when disabled by the output control. The outputs are measured one at a time with one transition per measurement. 11 HD74ALVC16834 IV Characteristics for Register Output (Measured value) Weak condition HIGH Vcc = 3.15 V, Ta = 85°C VOH (V) 0.0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 2.5 3.0 3.5 I OH (mA) -20 -40 -60 -80 -100 Strong condition HIGH Vcc = 3.45 V, Ta = 0°C VOH (V) 0.0 0 I OH (mA) -30 -60 -90 -120 -150 12 0.5 1.0 1.5 2.0 HD74ALVC16834 Weak condition LOW Vcc = 3.15 V, Ta = 85°C 120 100 I OL (mA) 80 60 40 20 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 2.5 3.0 3.5 VOL (V) Strong condition LOW Vcc = 3.45 V, Ta = 0°C 200 I OL (mA) 150 100 50 0 0.0 0.5 1.0 1.5 2.0 VOL (V) 13 HD74ALVC16834 Package Dimensions Unit : mm +0.3 14.00 –0.1 29 6.10 +0.3 –0.1 56 0.20 +0.1 –0.05 0.50 28 0.08 M 0.15 ± 0.05 1 1.20 max 0.10 0.05 Min 0.40 Max 8.10 ± 0.3 10° Max 0.50 ± 0.1 Hitachi code EIAJ code JEDEC code 14 TTP-56D — — HD74ALVC16834 Cautions 1. Hitachi neither warrants nor grants licenses of any rights of Hitachi’s or any third party’s patent, copyright, trademark, or other intellectual property rights for information contained in this document. Hitachi bears no responsibility for problems that may arise with third party’s rights, including intellectual property rights, in connection with use of the information contained in this document. 2. Products and product specifications may be subject to change without notice. Confirm that you have received the latest product standards or specifications before final design, purchase or use. 3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. 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Even within the guaranteed ranges, consider normally foreseeable failure rates or failure modes in semiconductor devices and employ systemic measures such as failsafes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other consequential damage due to operation of the Hitachi product. 5. This product is not designed to be radiation resistant. 6. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without written approval from Hitachi. 7. Contact Hitachi’s sales office for any questions regarding this document or Hitachi semiconductor products. Hitachi, Ltd. Semiconductor & Integrated Circuits. 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