CD74HC194 Datasheet, PDF (1/8 Pages) Texas Instruments – High-Speed CMOS Logic 4-Bit Bidirectional Universal Shift Register

Data sheet acquired from Harris Semiconductor
SCHS164
September 1997
CD74HC194,
CD74HCT194
High-Speed CMOS Logic
4-Bit Bidirectional Universal Shift Register
[ /Title
(CD74
HC194,
CD74H
CT194)
/Sub-
ject
(High-
Speed
CMOS
Logic
4-Bit
Features
Description
• Four Operating Modes
- Shift Right, Shift Left, Hold and Reset
• Synchronous Parallel or Serial Operation
• _TTAyp=ic2a5l_ofC_MAX = 60MHz at V_CC = 5V, C_L = 15pF,
• Asynchronous Master Reset
• 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
The Harris CD74HC194 and CD74HCT194 are 4-bit shift
registers with Asynchronous Master Reset (MR). In the par-
allel mode (S0 and S1 are high), data is loaded into the
associated flip-flop and appears at the output after the posi-
tive transition of the clock input (CP). During parallel loading
serial data flow is inhibited. Shift left and shift right are
accomplished synchronously on the positive clock edge with
serial data entered at the shift left (DSL) serial input for the
shift right mode, and at the shift right (DSR) serial input for
the shift left mode. Clearing the register is accomplished by
a Low applied to the Master Reset (MR) pin.
Ordering Information
PART NUMBER TEMP. RANGE (^oC) PACKAGE
PKG.
NO.
CD74HC194E
-55 to 125
16 Ld PDIP E16.3
CD74HCT194E
-55 to 125
16 Ld PDIP E16.3
CD74HC194M
-55 to 125
16 Ld SOIC M16.15
NOTES:
1. When ordering, use the entire part number. Add the suffix 96 to
obtain the variant in the tape and reel.
2. Die for this part number is available which meets all electrical
specifications. Please contact your local sales office or Harris
customer service for ordering information.
Pinout
CD74HC194, CD74HCT194
(PDIP, SOIC)
TOP VIEW
MR 1
DSR 2
D₀ 3
D₁ 4
D₂ 5
D₃ 6
DSL 7
GND 8
16 V_CC
15 Q₀
14 Q₁
13 Q₂
12 Q₃
11 CP
10 S1
9 S0
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright © Harris Corporation 1997
1
File Number 1668.1