|Category||Logic => Registers|
|Description||Parallel-load 8-bit Registers|
|Company||Texas Instruments, Inc.|
|Datasheet||Download SN54ALS165FK datasheet
Complementary Outputs Direct Overriding Load (Data) Inputs Gated Clock Inputs Parallel-to-Serial Data Conversion Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPsdescription
The ALS165 are parallel-load 8-bit serial shift registers that, when clocked, shift the data toward serial (QH and QH) outputs. Parallel-in access to each stage is provided by eight individual direct data (A H) inputs that are enabled by a low level at the shift/load (SH/LD) input. The ALS165 have a clock-inhibit function and complemented serial outputs. Clocking is accomplished by a low-to-high transition of the clock (CLK) input while SH/LD is held high and the clock inhibit (CLK INH) input is held low. The functions of CLK and CLK INH are interchangeable. Since a low CLK and a low-to-high transition of CLK INH also accomplishes clocking, CLK INH should be changed to the high level only while CLK is high. Parallel loading is inhibited when SH/LD is held high. The parallel inputs to the register are enabled while SH/LD is low independently of the levels of the CLK, CLK INH, or serial (SER) inputs. No internal connection CLK INH X H FUNCTION Parallel load No change No change Shift
The SN54ALS165 is characterized for operation over the full military temperature range to 125°C. The SN74ALS165 is characterized for operation from to 70°C.
L Shift = content of each internal register shifts toward serial outputs. Data at SER is shifted into first register.
PRODUCTION DATA information is 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.
1 SH/LD CLK INH CLK SER 9 7 This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the D, J, and N packages. SRG8 C1 [LOAD] 1 C2/absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC. 7 V Input voltage, VI. 7 V Operating free-air temperature range, TA: to 70°C Storage temperature range. 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.
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