首页资源分类IC设计及制造 > 8未双向芯片

8未双向芯片

已有 445117个资源

下载专区

文档信息举报收藏

标    签:双向发送芯片

分    享:

文档简介

绝对官方文档资料!绝对正品

文档预览

74LVT245 • 74LVTH245 Low Voltage Octal Bidirectional Transceiver with 3-STATE Inputs/Outputs November 1999 Revised March 2005 74LVT245 • 74LVTH245 Low Voltage Octal Bidirectional Transceiver with 3-STATE Inputs/Outputs General Description The LVT245 and LVTH245 contain eight non-inverting bidirectional buffers with 3-STATE outputs and are intended for bus-oriented applications. The Transmit/Receive (T/R) input determines the direction of data flow through the bidirectional transceiver. Transmit (active-HIGH) enables data from A ports to B ports; Receive (active-LOW) enables data from B ports to A ports. The Output Enable input, when HIGH, disables both A and B ports by placing them in a HIGH Z condition. The LVTH245 data inputs include bushold, eliminating the need for external pull-up resistors to hold unused inputs. These transceivers are designed for low-voltage (3.3V) VCC applications, but with the capability to provide a TTL interface to a 5V environment. The LVT245 and LVTH245 are fabricated with an advanced BiCMOS technology to achieve high speed operation similar to 5V ABT while maintaining a low power dissipation. Features s Input and output interface capability to systems at 5V VCC s Bushold data inputs eliminate the need for external pull-up resistors to hold unused inputs (74LVTH245), also available without bushold feature (74LVT245) s Live insertion/extraction permitted s Power Up/Down high impedance provides glitch-free bus loading s Outputs source/sink, 32 mA/64 mA s Latch-up performance exceeds 500 mA s ESD performance: Human-body model ! 2000V Machine model ! 200V Charged-device model ! 1000V Ordering Code: Order Number Package Number Package Description 74LVT245WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 74LVT245SJ M20D Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74LVT245MSA MSA20 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide 74LVT245MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 74LVT245MTCX_NL (Note 1) MTC20 Pb-Free 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 74LVTH245WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 74LVTH245SJ M20D Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74LVTH245MSA MSA20 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide 74LVTH245MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 74LVTH245MTCX_NL MTC20 Pb-Free 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm (Note 1) Wide Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code. Pb-Free package per JEDEC J-STD-020B. Note 1: “_NL” indicates Pb-Free package (per JEDEC J-STD-020B). Device available in Tape and Reel only. © 2005 Fairchild Semiconductor Corporation DS500203 www.fairchildsemi.com 74LVT245 • 74LVTH245 Logic Symbols IEEE/IEC Connection Diagram Pin Descriptions Pin Names Description OE T/R A0–A7 B0–B7 Output Enable Input Transmit/Receive Input Side A Inputs or 3-STATE Outputs Side B Inputs or 3-STATE Outputs Truth Table Inputs OE T/R L L L H H X H HIGH Voltage Level L LOW Voltage Level X Immaterial Outputs Bus B Data to Bus A Bus A Data to Bus B HIGH-Z State www.fairchildsemi.com 2 74LVT245 • 74LVTH245 Absolute Maximum Ratings(Note 2) Symbol VCC VI VO Parameter Supply Voltage DC Input Voltage Output Voltage IIK DC Input Diode Current IOK DC Output Diode Current IO DC Output Current ICC IGND TSTG DC Supply Current per Supply Pin DC Ground Current per Ground Pin Storage Temperature Value 0.5 to 4.6 0.5 to 7.0 0.5 to 7.0 0.5 to 7.0 50 50 64 128 r64 r128 65 to 150 Recommended Operating Conditions Conditions Output in 3-STATE Output in HIGH or LOW State (Note 3) VI  GND VO  GND VO ! VCC Output at HIGH State VO ! VCC Output at LOW State Units V V V V mA mA mA mA mA qC Symbol Parameter Min Max Units VCC Supply Voltage 2.7 3.6 V VI Input Voltage 0 5.5 V IOH High-Level Output Current 32 mA IOL Low-Level Output Current 64 mA TA Free Air Operating Temperature 40 85 qC 't/'V Input Edge Rate, VIN 0.8V–2.0V, VCC 3.0V 0 10 ns/V Note 2: Absolute Maximum continuous ratings are those values beyond which damage to the device may occur. Exposure to these conditions or conditions beyond those indicated may adversely affect device reliability. Functional operation under absolute maximum rated conditions is not implied. Note 3: IO Absolute Maximum Rating must be observed. DC Electrical Characteristics Symbol Parameter VIK Input Clamp Diode Voltage VIH Input HIGH Voltage VIL Input LOW Voltage VOH Output HIGH Voltage VOL Output LOW Voltage II(HOLD) (Note 4) II(OD) (Note 4) II Bushold Input Minimum Drive Bushold Input Over-Drive Current to Change State Input Current Control Pins Data Pins IOFF IPU/PD Power Off Leakage Current Power Up/Down 3-STATE Current IOZL 3-STATE Output Leakage Current IOZL (Note 4) 3-STATE Output Leakage Current IOZH 3-STATE Output Leakage Current VCC (V) 2.7 2.7–3.6 2.7–3.6 2.7–3.6 2.7 3.0 2.7 2.7 3.0 3.0 3.0 3.0 3.0 3.6 3.6 3.6 0 0–1.5V 3.6 3.6 3.6 TA 40qC to 85qC Min Max 1.2 2.0 0.8 VCC - 0.2 2.4 2.0 0.2 0.5 0.4 0.5 0.55 75 75 500 500 10 r1 5 1 r100 r100 5 5 5 Units V V V V V V V V V V PA PA PA PA PA PA PA PA PA PA PA PA PA Conditions II 18 mA VO d 0.1V or VO t VCC  0.1V IOH 100 PA IOH  8 mA IOH 32 mA IOL 100 PA IOL 24 mA IOL 16 mA IOL 32 mA IOL 64 mA VI 0.8V VI 2.0V (Note 5) (Note 6) VI 5.5V VI 0V or VCC VI 0V VI VCC 0V d VI or VO d 5.5V VO 0.5V to VCC VI GND to VCC VO 0.5V VO 0.0V VO 3.0V 3 www.fairchildsemi.com 74LVT245 • 74LVTH245 DC Electrical Characteristics (Continued) Symbol Parameter VCC TA 40qC to 85qC Units (V) Min Max Conditions IOZH (Note 4) 3-STATE Output Leakage Current 3.6 IOZH 3-STATE Output Leakage Current 3.6 5 PA VO 3.6V 10 PA VCC  VO d 5.5V ICCH Power Supply Current 3.6 0.19 mA Outputs HIGH ICCL ICCZ ICCZ Power Supply Current Power Supply Current Power Supply Current 3.6 5 mA Outputs LOW 3.6 0.19 mA Outputs Disabled 3.6 0.19 mA VCC d VO d 5.5V, Outputs Disabled 'ICC Increase in Power Supply Current 3.6 (Note 7) 0.2 mA One Input at VCC  0.6V Other Inputs at VCC or GND Note 4: Applies to Bushold versions only (LVTH245). Note 5: An external driver must source at least the specified current to switch from LOW-to-HIGH. Note 6: An external driver must sink at least the specified current to switch from HIGH-to-LOW. Note 7: This is the increase in supply current for each input that is at the specified voltage level rather than VCC or GND. Dynamic Switching Characteristics (Note 8) Symbol Parameter VCC TA 25qC (V) Min Typ Max VOLP Quiet Output Maximum Dynamic VOL 3.3 0.8 VOLV Quiet Output Minimum Dynamic VOL 3.3 0.8 Note 8: Characterized in SOIC package. Guaranteed parameter, but not tested. Note 9: Max number of outputs defined as (n). n1 data inputs are driven 0V to 3V. Output under test held LOW. Units V V Conditions CL 50 pF, RL 500: (Note 9) (Note 9) AC Electrical Characteristics TA 40qC to 85qC Symbol Parameter CL 50 pF, RL 500: VCC 3.3V r 0.3V VCC 2.7V Units Min Max Min Max tPLH Propagation Delay tPHL 1.2 3.6 1.2 4.0 ns 1.2 3.5 1.2 4.0 tPZH tPZL Output Enable Time 1.3 5.5 1.3 7.1 ns 1.7 5.7 1.7 6.7 tPHZ tPLZ Output Disable 2.0 5.9 2.0 6.5 ns 2.0 5.0 2.0 5.1 tOSHL tOSLH Output to Output Skew (Note 10) 1.0 1.0 ns Note 10: Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. The specification applies to any outputs switching in the same direction, either HIGH-to-LOW (tOSHL) or LOW-to-HIGH (tOSLH). Capacitance (Note 11) Symbol Parameter Conditions CIN Input Capacitance CI/O Input/Output Capacitance Note 11: Capacitance is measured at frequency f VCC 0V, VI 0V or VCC VCC 3.0V, VO 0V or VCC 1 MHz, per MIL-STD-883, Method 3012. Typical 4 8 Units pF pF www.fairchildsemi.com 4 74LVT245 • 74LVTH245 Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide Package Number M20B 5 www.fairchildsemi.com 74LVT245 • 74LVTH245 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M20D www.fairchildsemi.com 6 74LVT245 • 74LVTH245 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide Package Number MSA20 7 www.fairchildsemi.com 74LVT245 • 74LVTH245 Low Voltage Octal Bidirectional Transceiver with 3-STATE Inputs/Outputs Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Package Number MTC20 Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com www.fairchildsemi.com 8

Top_arrow
回到顶部
EEWORLD下载中心所有资源均来自网友分享,如有侵权,请发送举报邮件到客服邮箱bbs_service@eeworld.com.cn 或通过站内短信息或QQ:273568022联系管理员 高进,我们会尽快处理。