 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| DM74ALS373 Octal D-Type 3-STATE Transparent Latch April 1984 Revised February 2000 DM74ALS373 Octal D-Type 3-STATE Transparent Latch General Description These 8-bit registers feature totem-pole 3-STATE outputs designed specifically for driving highly-capacitive or relatively low-impedance loads. The high-impedance state and increased high-logic-level drive provide these registers with the capability of being connected directly to and driving the bus lines in a bus-organized system without need for interface or pull-up components. They are particularly attractive for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. The eight latches of the DM74ALS373 are transparent Dtype latches. While the enable (G) is HIGH the Q outputs will follow the data (D) inputs. When the enable is taken LOW the output will be latched at the level of the data that was set up. A buffered output control input can be used to place the eight outputs in either a normal logic state (HIGH or LOW logic levels) or a high-impedance state. In the high-impedance state the outputs neither load nor drive the bus lines significantly. The output control does not affect the internal operation of the latches. That is, the old data can be retained or new data can be entered even while the outputs are OFF. Features s Switching specifications at 50 pF s Switching specifications guaranteed over full temperature and VCC range s Advanced oxide-isolated, ion-implanted Schottky TTL process s Functionally and pin for pin compatible with LS TTL counterpart s Improved AC performance over DM74LS373 at approximately half the power s 3-STATE buffer-type outputs drive bus lines directly Ordering Code: Order Number DM74ALS373WM DM74ALS373SJ DM74ALS373N Package Number M20B M20D N20A Package Description 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering code. Connection Diagram (c) 2000 Fairchild Semiconductor Corporation DS006220 www.fairchildsemi.com DM74ALS373 Function Table Output Control L L L H L = LOW State H = HIGH State X = Don't Care Z = High Impedance State Q0 = Previous Condition of Q Logic Diagram D H L X X Output Q H L Q0 Z Enable G H H L X www.fairchildsemi.com 2 DM74ALS373 Absolute Maximum Ratings(Note 1) Supply Voltage Input Voltage Voltage Applied to Disabled Output Operating Free Air Temperature Range Storage Temperature Range Typical JA N Package M Package 57.0C/W 76.0C/W 7V 7V 5.5V 0C to +70C -65C to +150C Note 1: The "Absolute Maximum Ratings" are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The "Recommended Operating Conditions" table will define the conditions for actual device operation. Recommended Operating Conditions Symbol VCC VIH VIL IOH IOL tW tSU tH TA Supply Voltage HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Current LOW Level Output Current Width of Enable Pulse, HIGH or LOW Data Setup Time (Note 2) Data Hold Time (Note 2) Free Air Operating Temperature 10 10 7 0 70 Parameter Min 4.5 2 0.8 -2.6 24 Nom 5 Max 5.5 Units V V V mA mA ns ns ns C Note 2: The () arrow indicates the negative edge of the enable is used for reference. Electrical Characteristics over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25C. Symbol VIK VOH Parameter Input Clamp Voltage HIGH Level Output Voltage VOL II IIH IIL IO IOZH IOZL ICC LOW Level Output Voltage Input Current at Maximum Input Voltage HIGH Level Input Current LOW Level Input Current Output Drive Current OFF-State Output Current HIGH Level Voltage Applied OFF-State Output Current LOW Level Voltage Applied Supply Current VCC = 4.5V VCC = 4.5V to 5.5V IOH = -400 A VCC = 4.5V VCC = 5.5V VIH = 7V VCC = 5.5V, VIH = 2.7V VCC = 5.5V, VIL = 0.4V VCC = 5.5V VCC = 5.5V VO = 2.7V VCC = 5.5V VO = 0.4V VCC = 5.5V Outputs OPEN Outputs HIGH Outputs LOW Outputs Disabled 9 16 17 VO = 2.25V -30 IOL = 24 mA Conditions VCC = 4.5V, II = -18 mA IOH = -2.6 mA 2.4 VCC - 2 0.35 0.5 0.1 20 -0.1 -112 20 -20 16 25 27 3.3 Min Typ Max -1.5 Units V V V V mA A mA mA A A mA mA mA 3 www.fairchildsemi.com DM74ALS373 Switching Characteristics over recommended operating free air temperature range Symbol tPLH tPHL tPLH tPHL tPZH tPZL tPHZ tPLZ Parameter Propagation Delay Time LOW-to-HIGH Level Output Propagation Delay Time HIGH-to-LOW Level Output Propagation Delay Time LOW-to-HIGH Level Output Propagation Delay Time HIGH-to-LOW Level Output Output Enable Time to HIGH Level Output Output Enable Time to LOW Level Output Output Disable Time from HIGH Level Output Output Disable Time from LOW Level Output Conditions VCC = 4.5V to 5.5V RL = 500 CL = 50 pF From Data Data Enable Enable Output Control Output Control Output Control Output Control To Any Q Any Q Any Q Any Q Any Q Any Q Any Q Any Q Min 2 4 6 7 6 5 2 2 Max 12 16 22 23 18 20 10 12 Units ns ns ns ns ns ns ns ns www.fairchildsemi.com 4 DM74ALS373 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 DM74ALS373 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M20D www.fairchildsemi.com 6 DM74ALS373 Octal D-Type 3-STATE Transparent Latch Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Package Number N20A 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. 7 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 |
Price & Availability of DM74ALS373
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |