16-BIT BUS TRANSCEIVERS

www.DataSheet4U.com 54AC16245, 74AC16245 16-BIT BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCAS235A – MARCH 1990 – REVISED APRIL 1996 D D D D D D D Members of the Texas Instruments Widebust Family 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers Flow-Through Architecture Optimizes PCB Layout Distributed VCC and GND Configuration Minimizes High-Speed Switching Noise EPIC t (Enhanced-Performance Implanted CMOS) 1-m m Process 500-mA Typical Latch-Up Immunity at 125°C Package Options Include Plastic Thin Shrink Small-Outline (DGG) Package, 300-mil Shrink Small-Outline (DL) Package Using 25-mil Center-to-Center Pin Spacings and 380-mil Fine-Pitch Ceramic Flat (WD) Package Using 25-mil Center-to-Center Pin Spacings 54AC16245 . . . WD PACKAGE 74AC16245 . . . DGG OR DL PACKAGE (TOP VIEW) description The ’AC16245 are 16-bit bus transceivers organized as dual-octal noninverting 3-state transceivers designed for asynchronous two-way communication between data buses. The control function implementation minimizes external timing requirements These devices allow data transmission from the A bus to the B bus or from the B bus to the A bus, depending upon the logic level at the direction control (DIR) input. The output-enable input (OE) can be used to disable the devices so that the buses are effectively isolated. 1DIR 1B1 1B2 GND 1B3 1B4 VCC 1B5 1B6 GND 1B7 1B8 2B1 2B2 GND 2B3 2B4 VCC 2B5 2B6 GND 2B7 2B8 2DIR 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 1OE 1A1 1A2 GND 1A3 1A4 VCC 1A5 1A6 GND 1A7 1A8 2A1 2A2 GND 2A3 2A4 VCC 2A5 2A6 GND 2A7 2A8 2OE The 74AC16245 is packaged in TI’s shrink small-outline package, which provides twice the I/O pin count and functionality of standard small-outline packages in the same printed-circuit-board area. The 54AC16245 is characterized for operation over the full military temperature range of –55°C to 125°C. The 74AC16245 is characterized for operation from –40°C to 85°C. FUNCTION TABLE CONTROL INPUTS OE L L H DIR L H X B data to A bus A data to bus Isolation OPERATION Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. EPIC and Widebus are trademarks of Texas Instruments Incorporated. UNLESS OTHERWISE NOTED this document contains PRODUCTION DATA information current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303 Copyright © 1996, Texas Instruments Incorporated • DALLAS, TEXAS 75265 1 54AC16245, 74AC16245 16-BIT BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCAS235A – MARCH 1990 – REVISED APRIL 1996 logic symbol† 1OE 1DIR 48 1 G3 3 EN1 [BA] 3 EN2 [AB] 25 2OE 2DIR 24 G6 6 EN4 [BA] 6 EN5 [AB] 1A1 47 1 1 1 2 3 5 6 8 9 11 12 4 1 1 2A2 2A3 2A4 2A5 2A6 2A7 2A8 35 33 32 30 29 27 26 5 13 1B2 1B3 1B4 1B5 1B6 1B7 1B8 2B1 2 1B1 1A2 1A3 1A4 1A5 1A6 1A7 1A8 2A1 46 44 43 41 40 38 37 36 14 16 17 19 20 22 23 2B2 2B3 2B4 2B5 2B6 2B7 2B8 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. logic diagram (positive logic) 1OE 48 2OE 25 1DIR 1 2DIR 24 1A1 47 2 1B1 2A1 36 13 2B1 To Seven Other Transceivers To Seven Other Transceivers 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 54AC16245, 74AC16245 16-BIT BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCAS235A – MARCH 1990 – REVISED APRIL 1996 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to VCC + 0.5 V Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to VCC + 0.5 V Input clamp current, IIK (VI < 0 or VI > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Output clamp current, IOK (VO < 0 or VO > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±400 mA Maximum power dissipation at TA = 55°C (in still air) (see Note 2): DGG package . . . . . . . . . . . . . . . . 0.85 W DL package . . . . . . . . . . . . . . . . . . . 1.2 W Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C † 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 conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. The maximum package power dissipation is calculated using a junction temperature of 150_ C and a board trace length of 750 mils. recommended operating conditions (see Note 3) 54AC16245 MIN VCC VIH Supply voltage (see Note 4) High-level input voltage VCC = 3 V VCC = 4.5 V VCC = 5.5 V VCC = 3 V VIL VI VO IOH Low-level input voltage Input voltage Output voltage High-level output current VCC = 3 V VCC = 4.5 V VCC = 5.5 V VCC = 3 V IOL ∆t/∆v Low-level output current Input transition rise or fall rate VCC = 4.5 V VCC = 5.5 V 0 VCC = 4.5 V VCC = 5.5 V 0 0 3 2.1 3.15 3.85 0.9 1.35 1.65 VCC VCC –4 –24 –24 12 24 24 10 0 –40 0 0 NOM 5 MAX 5.5 74AC16245 MIN 3 2.1 3.15 3.85 0.9 1.35 1.65 VCC VCC –4 –24 –24 12 24 24 10 85 ns/V °C mA mA V V V V NOM 5 MAX 5.5 UNIT V TA Operating free-air temperature –55 125 NOTES: 3. All unused pins (input and I/O) must be held high or low to prevent them from floating. 4. All VCC and GND pins must be connected to the proper voltage power supply. PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 54AC16245, 74AC16245 16-BIT BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCAS235A – MARCH 1990 – REVISED APRIL 1996 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VCC 3V IOH = –50 µA VOH IOH = –4 mA IOH = –24 mA 24 IOH = –75 mA† IOL = 50 µA VOL IOL = 12 mA IOL = 24 mA IOL = 75 mA† II IOZ ICC Ci Co VI = VCC or GND VI = VCC or GND VI = VCC or GND, VI = VCC or GND IO = 0 4.5 V 5.5 V 3V 4.5 V 5.5 V 5.5 V 3V 4.5 V 5.5 V 3V 4.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5V 4.5 ±0.1 ±0.5 8 0.1 0.1 0.1 0.36 0.36 0.36 MIN 2.9 4.4 5.4 2.58 3.94 4.94 TA = 25°C TYP MAX 54AC16245 MIN 2.9 4.4 5.4 2.48 3.8 4.8 3.85 0.1 0.1 0.1 0.44 0.44 0.44 1.65 ±1 ±5 80 MAX 74AC16245 MIN 2.9 4.4 5.4 2.48 3.8 4.8 3.85 0.1 0.1 0.1 0.44 0.44 0.44 1.65 ±1 ±5 80 µA µA µA pF V V MAX UNIT VI = VCC or GND 5V 16 † Not more than one output should be tested at a time, and the duration of the test should not exceed 10 ms. ‡ For I/O ports, the parameter IOZ includes the input leakage current. switching characteristics over recommended operating free-air temperature range, VCC = 3.3 V ± 0.3 V (see Figure 1) PARAMETER tPLH tPHL tPZH tPZL tPHZ tPLZ FROM (INPUT) A or B TO (OUTPUT) B or A A or B A or B TA = 25°C MIN TYP MAX 2.5 3.1 2.8 3.9 5.3 4.4 7.6 9 8.6 12 8.4 7.7 10.4 12.3 11.8 16.2 10.4 9.7 54AC16245 MIN 2.5 3.1 2.8 3.9 5.3 4.4 MAX 11.9 13.5 13.2 18 11.2 10.3 74AC16245 MIN 2.5 3.1 2.8 3.9 5.3 4.4 MAX 11.9 13.5 13.2 18 11.2 10.3 UNIT ns ns ns OE OE switching characteristics over recommended operating free-air temperature range, VCC = 5 V ± 0.5 V (see Figure 1) PARAMETER tPLH tPHL tPZH tPZL tPHZ tPLZ FROM (INPUT) A or B TO (OUTPUT) B or A A or B A or B MIN 2 2.5 2.3 3 5 4.2 TA = 25°C TYP MAX 4.6 5.2 4.9 6.2 7.2 6.2 6.9 7.9 7.5 9.5 9.1 8.1 54AC16245 MIN 2 2.5 2.3 3 5 4.2 MAX 7.9 8.9 8.6 10.7 9.8 8.7 74AC16245 MIN 2 2.5 2.3 3 5 4.2 MAX 7.9 8.9 8.6 10.7 9.8 8.7 UNIT ns ns ns OE OE PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 54AC16245, 74AC16245 16-BIT BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCAS235A – MARCH 1990 – REVISED APRIL 1996 operating characteristics, VCC = 5 V, TA = 25°C PARAMETER Cpd d Power dissipation capacitance per latch Outputs enabled Outputs disabled TEST CONDITIONS CL = 50 pF pF, f = 1 MHz TYP 43 8 UNIT pF PARAMETER MEASUREMENT INFORMATION 2 × VCC From Output Under Test CL = 50 pF (see Note A) 500 Ω S1 Open GND 500 Ω TEST tPLH/tPHL tPLZ/tPZL tPHZ/tPZH S1 Open 2 × VCC GND LOAD CIRCUIT Output Control (low-level enabling) VCC Output Waveform 1 S1 at 2 × VCC (see Note B) Output Waveform 2 S1 at GND (see Note B) VCC 50% tPZL tPLZ 50% VCC tPHZ 80% VCC VOH 20% VCC 50% 0V Input tPLH 50% 50% 0V tPHL VOH 50% VCC 50% VCC VOL [ VCC VOL tPZ