Document
TC74VHC373F/FK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74VHC373F, TC74VHC373FK
Octal D-Type Latch with 3-State Output
The TC74VHC373 is an advanced high speed CMOS OCTAL LATCH 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 latch is controlled by a latch enable input (LE) and an output enable input ( OE ).
When the OE input is high, the eight outputs are in a high impedance state.
An input protection circuit ensures that 0 to 5.5 V can be applied to the input pins without regard to the supply voltage. This device can be used to interface 5 V to 3 V systems and two supply systems such as battery back up. This circuit prevents device destruction due to mismatched supply and input voltages.
TC74VHC373F TC74VHC373FK
Features
High speed: tpd = 5.0 ns (typ.) at VCC = 5 V Low power dissipation: ICC = 4 μA (max) at Ta = 25°C High noise immunity: VNIH = VNIL = 28% VCC (min) Power down protection is provided on all inputs. Balanced propagation delays: tpLH ∼− tpHL Wide operating voltage range: VCC (opr) = 2 to 5.5 V Low noise: VOLP = 0.8 V (max) Pin and function compatible with 74ALS373
Weight SOP20-P-300-1.27A VSSOP20-P-0030-0.50
: 0.22 g (typ.) : 0.03 g (typ.)
© 2019
1
Toshiba Electronic Devices & Storage Corporation
Start of commercial production
1991-05
2019-01-31
Pin Assignment
IEC Logic Symbol
TC74VHC373F/FK
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 LE
(1) EN LE (11) 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
Truth Table
Inputs
OE LE
D
H
X
X
L
L
X
L
H
L
L
H
H
Output
Z Qn L H
X: Don’t care Z: High impedance Qn: Q outputs are latched at the time when the LE input is taken to a low logic level.
System Diagram
D0 3
D
D1 4
D
D2 7
D
D3 8
D
D4 13
D
D5 14
D
D6 17
D
D7 18
D
11 LE
L
L
L
L
L
L
L
L
1
2
5
6
9
12
15
16
19
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
© 2019
2
Toshiba Electronic Devices & Storage Corporation
2019-01-31
Absolute Maximum Ratings (Note)
TC74VHC373F/FK
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 VCC + 0.5
V
−20
mA
±20
mA
±25
mA
±75
mA
180
mW
−65 to 150
°C
Note:
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 application of high temperature/current/voltage and the significant change in temperature, etc.) may cause this product to decrease in the re.