CD54HC40105_08 Datasheet, PDF (1/22 Pages) Texas Instruments – High-Speed CMOS Logic 4-Bit x 16-Word FIFO Register

Data sheet acquired from Harris Semiconductor
SCHS222C
February 1998 - Revised October 2003
CD54HC40105, CD74HC40105,
CD54HCT40105, CD74HCT40105
High-Speed CMOS Logic
4-Bit x 16-Word FIFO Register
[ /Title
(CD74
HC401
05,
CD74
HCT40
105)
/Sub-
ject
(High
Speed
CMOS
Features
Description
• Independent Asynchronous Inputs and Outputs
• Expandable in Either Direction
• Reset Capability
• Status Indicators on Inputs and Outputs
• Three-State Outputs
• Shift-Out Independent of Three-State Control
• Fanout (Over Temperature Range)
- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
• Wide Operating Temperature Range . . . -55^oC to 125^oC
• Balanced Propagation Delay and Transition Times
• Significant Power Reduction Compared to LSTTL
Logic ICs
• HC Types
- 2V to 6V Operation
- High Noise Immunity: N_IL = 30%, N_IH = 30% of V_CC
at V_CC = 5V
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
V_IL= 0.8V (Max), V_IH = 2V (Min)
- CMOS Input Compatibility, I_l ≤ 1µA at V_OL, V_OH
Applications
• Bit-Rate Smoothing
• CPU/Terminal Buffering
• Data Communications
• Peripheral Buffering
• Line Printer Input Buffers
• Auto-Dialers
• CRT Buffer Memories
• Radar Data Acquisition
The ’HC40105 and ’HCT40105 are high-speed silicon-gate
CMOS devices that are compatible, except for “shift-out”
circuitry, with the CD40105B. They are low-power first-in-out
(FIFO) “elastic” storage registers that can store 16 four-bit
words. The 40105 is capable of handling input and output
data at different shifting rates. This feature makes it
particularly useful as a buffer between asynchronous
systems.
Each work position in the register is clocked by a control flip-
flop, which stores a marker bit. A “1” signifies that the posi-
tion’s data is filled and a “0” denotes a vacancy in that posi-
tion. The control flip-flop detects the state of the preceding
flip-flop and communicates its own status to the succeeding
flip-flop. When a control flip-flop is in the “0” state and sees a
“1” in the preceeding flip-flop, it generates a clock pulse that
transfers data from the preceding four data latches into its
own four data latches and resets the preceding flip-flop to
“0”. The first and last control flip-flops have buffered outputs.
Since all empty locations “bubble” automatically to the input
end, and all valid data ripple through to the output end, the
status of the first control flip-flop (DATA-IN READY) indicates
if the FIFO is full, and the status of the last flip-flop (DATA-
OUT READY) indicates if the FIFO contains data. As the
earliest data are removed from the bottom of the data stack
(the output end), all data entered later will automatically
propagate (ripple) toward the output.
Ordering Information
PART NUMBER
CD54HC40105F3A
CD54HCT40105F3A
CD74HC40105E
CD74HC40105M
CD74HC40105MT
CD74HC40105M96
CD74HCT40105E
CD74HCT40105M
CD74HCT40105MT
TEMP. RANGE (^oC) PACKAGE
-55 to 125
16 Ld CERDIP
-55 to 125
16 Ld CERDIP
-55 to 125
16 Ld PDIP
-55 to 125
16 Ld SOIC
-55 to 125
16 Ld SOIC
-55 to 125
16 Ld SOIC
-55 to 125
16 Ld PDIP
-55 to 125
16 Ld SOIC
-55 to 125
16 Ld SOIC
CD74HCT40105M96
-55 to 125
16 Ld SOIC
NOTE: When ordering, use the entire part number. The suffix 96
denotes tape and reel. The suffix T denotes a small-quantity reel
of 250.
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright © 2003, Texas Instruments Incorporated
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