View 74LS165_78366.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

DM74LS165 8-Bit Parallel In/Serial Output Shift Registers
August 1986 Revised March 2000
DM74LS165 8-Bit Parallel In/Serial Output Shift Registers
General Description
This device is an 8-bit serial shift register which shifts data in the direction of QA toward QH when clocked. Parallel-in access is made available by eight individual direct data inputs, which are enabled by a low level at the shift/load input. These registers also feature gated clock inputs and complementary outputs from the eighth bit. Clocking is accomplished through a 2-input NOR gate, permitting one input to be used as a clock-inhibit function. Holding either of the clock inputs HIGH inhibits clocking, and holding either clock input LOW with the load input HIGH enables the other clock input. The clock-inhibit input should be changed to the high level only while the clock input is HIGH. Parallel loading is inhibited as long as the load input is HIGH. Data at the parallel inputs are loaded directly into the register on a HIGH-to-LOW transition of the shift/load input, regardless of the logic levels on the clock, clock inhibit, or serial inputs.
Features
s Complementary outputs s Direct overriding (data) inputs s Gated clock inputs s Parallel-to-serial data conversion s Typical frequency 35 MHz s Typical power dissipation 105 mW
Ordering Code:
Order Number DM74LS165M DM74LS165WM DM74LS165N Package Number M16A M16B N16E Package Description 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow 16-Lead Small Outline Intergrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 16-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
Function Table
Inputs Load Inhibit L H H H H X L L L H X L X X X H L X A...H a...h X X X X Internal QA a H L QB b QAn QAn QH h QH0 QGn QGn QH0 Shift/ Clock Clock Serial Parallel Outputs Output
QA0 QB0
QA0 QB0
H = HIGH Level (steady state) L = LOW Level (steady state) X = Don't Care (any input, including transitions) = Transition from LOW-to-HIGH level a...h = The level of steady-state input at inputs A through H, respectively. QA0, QB0, QH0 = The level of QA, QB, or QH, respectively, before the indicated steady-state input conditions were established. QAn, QGn = The level of QA or QG, respectively, before the most recent transition of the clock.
(c) 2000 Fairchild Semiconductor Corporation
DS006399
www.fairchildsemi.com
DM74LS165
Logic Diagram
Timing Diagram
Typical Shift, Load, and Inhibit Sequences
www.fairchildsemi.com
2
DM74LS165
Absolute Maximum Ratings(Note 1)
Supply Voltage Input Voltage Operating Free Air Temperature Range Storage Temperature Range 7V 7V 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 fCLK fCLK tW tSU Supply Voltage HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Current LOW Level Output Current Clock Frequency (Note 2) Clock Frequency (Note 3) Pulse Width (Note 3) Setup Time (Note 4) Clock Load Parallel Serial Enable Shift tH TA Hold Time (Note 4) Free Air Operating Temperature 0 0 25 15 10 20 30 45 0 0 70 ns C ns Parameter Min 4.75 2 0.8 -0.4 8 25 20 Nom 5 Max 5.25 Units V V V mA mA MHz MHz ns
Note 2: CL = 15 pF, RL = 2 k, TA = 25C and VCC = 5V Note 3: CL = 50 pF, RL = 2 k, TA = 25C and VCC = 5V Note 4: TA = 25C and VCC = 5V.
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted) Symbol VI VOH VOL Parameter Input Clamp Voltage HIGH Level Output Voltage LOW Level Output Voltage II IIH IIL IOS ICC Input Current @ Max Input Voltage HIGH Level Input Current LOW Level Input Current Short Circuit Output Current Supply Current VCC = Max VI = 2.7V VCC = Max VI = 0.4V VCC = Max (Note 6) VCC = Max (Note 7) Conditions VCC = Min, II = -18 mA VCC = Min, IOH = Max VIL = Max, VIH = Min VCC = Min, IOL = Max VIL = Max, VIH = Min IOL = 4 mA, VCC = Min VCC = Max, VI = 7V Shift/Load Others Shift/Load Others Shift/Load Others -20 21 0.35 0.25 2.7 3.4 0.4 0.5 0.4 0.3 0.1 60 20 -1.2 -0.4 -100 36 mA A mA mA mA V Min Typ (Note 5) Max -1.5 Units V V
Note 5: All typicals are at VCC = 5V, TA = 25 C. Note 6: Not more than one output should be shorted at a time, and the duration should not exceed one second. Note 7: With all outputs OPEN, clock inhibit and shift/load at 4.5V, and a clock pulse applied to the CLOCK input, ICC is measured first with the parallel inputs at 4.5V, then again grounded.
3
www.fairchildsemi.com
DM74LS165
Switching Characteristics
at VCC = 5V and TA = 25C Symbol fMAX tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL Parameter Maximum Clock Frequency 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 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 Load to Any Q Load to Any Q Clock to Any Q Clock to Any Q H to QH H to QH H to QH H to QH From (Input) To (Output) CL = 15 pF Min 25 35 35 40 40 25 30 Max RL = 2 k, CL = 50 pF Min 20 37 42 42 47 27 37 Max Units MHz ns ns ns ns ns ns
30
32
ns
25
32
ns
www.fairchildsemi.com
4
DM74LS165
Physical Dimensions inches (millimeters) unless otherwise noted
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow Package Number M16A
16-Lead Small Outline Intergrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide Package Number M16B
5
www.fairchildsemi.com
DM74LS165 8-Bit Parallel In/Serial Output Shift Registers
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Package Number N16E
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. www.fairchildsemi.com 6 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

▲Up To Search▲

Price & Availability of 74LS165

	To Download 74LS165 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .