CD74FCT821A Datasheet, PDF (1/7 Pages) Texas Instruments – BiCMOS FCT Interface Logic, 10- Bit D-Type Flip-Flops, Three-State

Data sheet acquired from Harris Semiconductor
SCHS264
January 1997
Features
• Buffered Inputs
NOFO_U^T_sRRe ^E_CNCMEO^OW_S^MD_T^M_e^E_c^E_h^SN_n^I_o^GD_lo^NE_g^SD_y
•
Typical Propagation Delay:
T_A = 25^oC, C_L = 50pF
7.5ns
at
V_CC
=
5V,
• CD74FCT821A
- Noninverting
• CD74FCT822A
- Inverting
• SCR Latchup Resistant BiCMOS Process and
Circuit Design
• Speed of Bipolar FAST™/AS/S
• 48mA Output Sink Current
• Output Voltage Swing Limited to 3.7V at V_CC = 5V
• Controlled Output Edge Rates
• Input/Output Isolation to V_CC
• BiCMOS Technology with Low Quiescent Power
Pinouts
CD74FCT821A
(PDIP, SOIC)
TOP VIEW
OE 1
D0 2
D1 3
D2 4
D3 5
D4 6
D5 7
D6 8
D7 9
D8 10
D9 11
GND 12
24 V_CC
23 Q0
22 Q1
21 Q2
20 Q3
19 Q4
18 Q5
17 Q6
16 Q7
15 Q8
14 Q9
13 CP
CD74FCT821A,
CD74FCT822A
BiCMOS FCT Interface Logic,
10- Bit D-Type Flip-Flops, Three-State
Description
The CD74FCT821A and CD74FCT822A ten bit, D-Type,
three-state, positive edge triggered flip-flops use a small
geometry BiCMOS technology. The output stage is a combi-
nation of bipolar and CMOS transistors that limits the output
HIGH level to two diode drops below V_CC. This resultant
lowering of output swing (0V to 3.7V) reduces power bus
ringing (a source of EMI) and minimizes V_CC bounce and
ground bounce and their effects during simultaneous output
switching. The output configuration also enhances switching
speed and is capable of sinking 48 milliamperes.
The ten flip-flops enter data into their registers on the LOW
to HIGH transition of the clock(CP). The Output Enable (OE)
controls the three state outputs and is independent of the
register operation. When the Output Enable (OE) is HIGH,
the outputs are in the high impedance state. The
CD74FCT821A and CD74FCT822A share the same config-
urations, but the CD74FCT821A outputs are noninverted
while the CD74FCT822A devices have inverted outputs.
Ordering Information
TEMP.
PART NUMBER RANGE (^oC) PACKAGE
PKG.
NO.
CD74FCT821AEN 0 to 70 24 Ld PDIP E24.3
CD74FCT822AEN 0 to 70 24 Ld PDIP E24.3
CD74FCT821AM
0 to 70 24 Ld SOIC M24.3
NOTE: When ordering the suffix M packages, use the entire part
number. Add the suffix 96 to obtain the variant in the tape and reel.
CD74FCT822A
(PDIP, SOIC)
TOP VIEW
OE 1
D0 2
D1 3
D2 4
D3 5
D4 6
D5 7
D6 8
D7 9
D8 10
D9 11
GND 12
24 V_CC
23 Q0
22 Q1
21 Q2
20 Q3
19 Q4
18 Q5
17 Q6
16 Q7
15 Q8
14 Q9
13 CP
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
FAST™ is a trademark of Fairchild Semiconductor.
Copyright © Harris Corporation 1997
8-1
File Number 2390.2