SN54LS168J ,BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERSSN54/74LS168SN54/74LS169BCD DECADE/MODULO16 BINARY SYNCHRONOUSBI-DIRECTIONAL COUNTERSBCD DECADE/MOD ..
SN54LS169J ,BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERSLOGIC DIAGRAMS (continued)SN54/74LS169P P P P0 1 2 3PECEPCETU/D TCCPCP DQ Q Q Q0 1 2 3GUARANTEED OP ..
SN54LS170J ,4 x 4 REGISTER FILE OPEN-COLLECTORSN54/74LS1704 x 4 REGISTER FILEOPEN-COLLECTORThe TTL /MSI SN54 /74LS170 is a high-speed, low-power ..
SN54LS170J ,4 x 4 REGISTER FILE OPEN-COLLECTORfeatures3-state outputs.• Simultaneous Read/Write Operation• Expandable to 512 Words of n-BitsJ SUF ..
SN54LS170J ,4 x 4 REGISTER FILE OPEN-COLLECTOR
SN54LS173AJ ,4-bit D-type register with 3-state outputsmaximum ratings over operating free-air temperature range (unless otherwise noted)Supply voltage, V ..
SN74HC00DBR ,Quad 2-Input Positive-NAND Gates 14-SSOP -40 to 85Logic Diagram (Positive Logic)• Power: Telecom or Server AC/DC SupplyA(Single Controller: Analog an ..
SN74HC00DG4 ,Quad 2-Input Positive-NAND Gates 14-SOIC -40 to 85Electrical Characteristics....... 512.3 Receiving Notification of Documentation Updates 116.6 Switc ..
SN74HC00DR ,Quad 2-Input Positive-NAND GatesMaximum Ratings(1)over operating free-air temperature range (unless otherwise noted)MIN MAX UNITSup ..
SN74HC00DRG4 ,Quad 2-Input Positive-NAND Gates 14-SOIC -40 to 85Maximum Ratings.. 411.2 Layout Example ...... 106.2 ESD Ratings........ 412 Device and Documentatio ..
SN74HC00N ,Quad 2-Input Positive-NAND GatesLogic Diagram (Positive Logic)• Power: Telecom or Server AC/DC SupplyA(Single Controller: Analog an ..
SN74HC00NSLE ,Quad 2-Input Positive-NAND GatesFeatures list 1• Removed Ordering Information table; see POA at the end of data sheet...... 1• Chan ..
SN54LS168J-SN54LS169J-SN74LS169N
BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERS
BCD DECADE/MODULO
16 BINARY SYNCHRONOUS
BI-DIRECTIONAL COUNTERSThe SN54/74LS168 and SN54/74LS169 are fully synchronous 4-stage
up/down counters featuring a preset capability for programmable operation,
carry lookahead for easy cascading and a U/D input to control the direction
of counting. The SN54/74LS168 counts in a BCD decade (8, 4, 2, 1)
sequence, while the SN54/74LS169 operates in a Modulo 16 binary
sequence. All state changes, whether in counting or parallel loading, are
initiated by the LOW-to-HIGH transition of the clock. Low Power Dissipation 100 mW Typical High-Speed Count Frequency 30 MHz Typical Fully Synchronous Operation Full Carry Lookahead for Easy Cascading Single Up/Down Control Input Positive Edge-Trigger Operation Input Clamp Diodes Limit High-Speed Termination Effects
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
VCC
U/D Q0 Q1 Q2 CETQ3 PE P0 P1 P2 P3 CEP GND
CONNECTION DIAGRAM DIP (TOP VIEW)
PIN NAMES LOADING (Note a)CEP
CET
U/D
P0–P3
Count Enable Parallel (Active LOW) Input
Count Enable Trickle (Active LOW) Input
Clock Pulse (Active positive going edge) Input
Parallel Enable (Active LOW) Input
Up-Down Count Control Input
Parallel Data Inputs
Flip-Flop Outputs
Terminal Count (Active LOW) Output
NOTES:
a. 1 TTL Unit Load (U.L.) = 40 μA HIGH/1.6 mA LOW.
b. The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial (74)
b. Temperature Ranges.
