TEXAS INSTRUMENTS 54AC16822, 54ACT16822, 74AC16822, 74ACT16822 Technical data

54AC16822, 54ACT16822
74AC16822, 74ACT16822

20-BIT D-TYPE FLIP-FLOPS WITH 3-STATE OUTPUTS

SCAS402 – JUNE 1990

• Members of Texas Instruments Widebus

Family

• Packaged in Shrink Small-Outline 300-mil

Packages (SSOP) and 380-mil Fine-Pitch
Ceramic Flat Packages Using 25-mil
Center-to-Center Pin Spacings

• Inputs are TTL- or CMOS-Voltage

Compatible

• 3-State Outputs Drive Bus Lines Directly

• Flow-Through Architecture Optimizes PCB

Layout

• Distributed V

and GND Pin Configuration

CC

Minimizes High-Speed Switching Noise

• EPIC (Enhanced-Performance Implanted

CMOS) 1-µm Process

• 500-mA Typical Latch-Up Immunity at

125°C

description

The ’AC16822 and ’ACT16822 are inverting 20-bit
D-type flip-flops composed of two 10-bit sections
with separate control signals. For either 10-bit
flip-flop section, the inverse of the data present at
the corresponding D inputs is stored in the
flip-flops on the rising edge of the clock input
(1CLK or 2CLK) and appears on the appropriate
Q outputs if the output enable 1OE
If 1OE

(or 2OE) is high, the outputs are in the
high-impedance state. 1OE
affect the operation of the flip-flops. Previously
stored data can be retained or new data can be
entered while the outputs are in the
high-impedance state.

FUNCTION TABLE, EACH SECTION

INPUTS

CLK OE

↑ H Current D Data Z
L H Previous D Data Z
↑ L Current D Data Inverse of Current D Data
L L Previous D Data Inverse of Previous D Data

FLIP-FLOP DATA Q OUTPUTS

(or 2OE) is low.

(or 2OE) does not

6822, 74ACT16822 . . . DL PACKAGE
6822, 54ACT16822 . . . WD PACKAGE

(T0P VIEW)

1OE

1

56

1Q1

1Q2

GND

GND

1Q10

GND

GND

2Q10

1Q3
1Q4

V

CC

1Q5
1Q6
1Q7

1Q8
1Q9

2Q1
2Q2
2Q3

2Q4
2Q5
2Q6

V

CC

2Q7
2Q8

2Q9

2OE

2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28

55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29

1CLK
1D

1

1D

2
GND
1D

3
1D

4
V

CC

1D5
1D

6
1D

7
GND
1D

8
1D

9
1D

10
2D

1
2D2
2D

3
GND
2D

4
2D

5
2D

6
V

CC

2D7
2D

8
GND
2D

9
2D

10
2CLK

PRODUCT PREVIEW

EPIC and Widebus are trademarks of Texas Instruments

Incorporated.

PRODUCT PREVIEW information concerns products in
the formative or design phase of development.
Characteristic data and other specifications are design
goals. Texas Instruments reserves the right to change or
discontinue these products without notice.

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Copyright  1990, Texas Instruments Incorporated

1

54AC16822, 54ACT16822
74AC16822, 74ACT16822
20-BIT D-TYPE FLIP-FLOPS WITH 3-STATE OUTPUTS

The 74AC16822 and 74ACT16822 are packaged in TI’s shrink small-outline package (SSOP) with 25-mil
center-to-center pin spacings. This package provides twice the I/O pin count and functionality of a standard
small-outline package in the same printed-circuit-board area.

The ’AC16822 has CMOS-compatible input thresholds. The ’ACT16822 has TTL-compatible input thresholds.
The 54AC16822 and 54ACT16822 are characterized over the full military temperature range of –55°C to 125°C.

The 74AC16822 and 74ACT16822 are characterized for operation from –40°C to 85°C.

logic diagram (positive logic)

PRODUCT PREVIEW

2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265