Document
TC74VHCT374AF/AFT/AFK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74VHCT374AF, TC74VHCT374AFT, TC74VHCT374AFK
Octal D-Type Flip Flop with 3-State Output
The TC74VHCT374A is an advanced high speed CMOS OCTAL FLIP-FLOP with 3-STATE OUTPUT fabricated with silicon gate C2MOS technology.
It achieves the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation.
This 8-bit D-type flip-flop is controlled by a clock input (CK) and an output enable input ( OE ).
When the OE input is high, the eight outputs are in a high impedance state.
The input voltage are compatible with TTL output voltage. This device may be used as a level converter for interfacing 3.3 V to 5 V system. Input protection and output circuit ensure that 0 to 5.5 V can be applied to the input and output (Note) pins without regard to the supply voltage. These structure prevents device destruction due to mismatched supply and input/output voltages such as battery back up, hot board insertion, etc.
Note: Output in off-state
Features
• High speed: fmax = 140 MHz (typ.) at VCC = 5 V • Low power dissipation: ICC = 4 μA (max) at Ta = 25°C • Compatible with TTL inputs: VIL = 0.8 V (max)
VIH = 2.0 V (min) • Power down protection is provided on all inputs and outputs. • Balanced propagation delays: tpLH ≈ tpHL • Low noise: VOLP = 1.5 V (max) • Pin and function compatible with the 74 series
(74AC/HC/F/ALS/LS etc.) 374 type.
TC74VHCT374AF TC74VHCT374AFT TC74VHCT374AFK
Weight SOP20-P-300-1.27A: TSSOP20-P-0044-0.65A: VSSOP20-P-0030-0.50:
0.22 g (typ.) 0.08 g (typ.) 0.03 g (typ.)
Start of commercial production
1995-12
1
2014-03-01
Pin Assignment
TC74VHCT374AF/AFT/AFK
IEC Logic Symbol
OE 1 Q0 2 D0 3 D1 4 Q1 5 Q2 6 D2 7 D3 8 Q3 9 GND 10
(top view)
20 VCC 19 Q7 18 D7 17 D6 16 Q6 15 Q5 14 D5 13 D4 12 Q4 11 CK
Truth Table
Inputs
OE CK D
H
X
X
L
X
L
L
L
H
X: Don’t care Z: High impedance Qn: No change
Output
Z Qn L H
System Diagram
OE (1) CK (11)
EN C1
D0 (3) 1D D1 (4) D2 (7) D3 (8) D4 (13) D5 (14) D6 (17) D7 (18)
(2) Q0 (5) Q1 (6) Q2 (9) Q3 (12) Q4 (15) Q5 (16) Q6 (19) Q7
D0 3
D
D1 4
D
D2 7
D
D3 8
D4 13
D5 14
D6 17
D7 18
D
D
D
D
D
11 CK
CK Q CK Q CK Q CK Q CK Q CK Q CK Q CK Q
1 OE
2
5
6
9
12
15
16
19
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
2
2014-03-01
TC74VHCT374AF/AFT/AFK
Absolute Maximum Ratings (Note 1)
Characteristics
Symbol
Rating
Unit
Supply voltage range DC input voltage
DC output voltage
Input diode current Output diode current DC output current DC VCC/ground current Power dissipation Storage temperature
VCC VIN
VOUT
IIK IOK IOUT ICC PD Tstg
−0.5 to 7.0
V
−0.5 to 7.0
V
−0.5 to 7.0
(Note 2)
V
−0.5 to VCC + 0.5 (Note 3)
−20
mA
±20
(Note 4) mA
±25
mA
±75
mA
180
mW
−65 to 150
°C
Note 1:
Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or even destruction. Using continuously under heavy loads (e.g. the app.