SN74LS670N ,4 x 4 REGISTER FILE WITH 3-STATE OUTPUTSSN54/74LS6704 x 4 REGISTER FILEWITH 3-STATE OUTPUTSThe TTL /MSI SN54 /74LS670 is a high-speed, low- ..
SN74LS670N3 ,4-by-4 register files with 3-state outputs
SN74LS670NSR ,4-by-4 register files with 3-state outputs
SN74LS673N , 16-BIT SHIFT REGISTERS
SN74LS673N , 16-BIT SHIFT REGISTERS
SN74LS681N ,4-Bit Parallel Binary Accumulator 20-PDIP 0 to 70
SP232ACT-L , Enhanced RS-232 Line Drivers/Receivers
SP232AEN-L , Enhanced RS-232 Line Drivers/Receivers
SP232AEP , Enhanced RS-232 Line Drivers/Receivers
SP232AEP , Enhanced RS-232 Line Drivers/Receivers
SP232AEP-L , Enhanced RS-232 Line Drivers/Receivers
SP232ECN-L , High Performance RS-232 Line Drivers/Receivers
SN54LS670J-SN74LS670N
3-STATE 4-by-4 Register File
4 x 4 REGISTER FILE
WITH 3-ST ATE OUTPUTSThe TTL/MSI SN54 /74LS670 is a high-speed, low-power 4 x 4 Register
File organized as four words by four bits. Separate read and write inputs, both
address and enable, allow simultaneous read and write operation.
The 3-state outputs make it possible to connect up to 128 outputs to in-
crease the word capacity up to 512 words. Any number of these devices can
be operated in parallel to generate an n-bit length.
The SN54/74LS170 provides a similar function to this device but it features
open-collector outputs. Simultaneous Read/Write Operation Expandable to 512 Words by n-Bits Typical Access Time to 20 ns 3-State Outputs for Expansion Typical Power Dissipation of 125 mW
CONNECTION DIAGRAM DIP (TOP VIEW)NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.--- -- -- -- ---- --- -- -- -- -- ---
PIN NAMES LOADING (Note a)D1 – D4 Data Inputs
WA, WB Write Address Inputs Write Enable (Active LOW) Input
RA, RB Read Address Inputs Read Enable (Active LOW) Input
Q1 – Q4 Outputs (Note b)
NOTES:
a) 1 TTL Unit Load (U.L.) = 40 μA HIGH/1.6 mA LOW.
b) The Output LOW drive factor is 7.5 U.L. for Military (54) and 15 U.L. for Commercial
(74) Temperature Ranges. The Output HIGH drive factor is 25 U.L. for Military and
65 U.L. for Commercial Temperature Ranges.
