74HC40105DB datasheet(9/25 Pages) PHILIPS

Part #	74HC40105DB

Description	4-bit x 16-word FIFO register

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Manufacturer	PHILIPS [NXP Semiconductors]

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1998 Jan 23

9

Philips Semiconductors

Product speciﬁcation

4-bit x 16-word FIFO register

74HC/HCT40105

DC CHARACTERISTICS FOR 74HCT

For the DC characteristics see

“74HC/HCT/HCU/HCMOS Logic Family Specifications”.

Output capability: standard

ICC category: MSI

Note to HCT types

The value of additional quiescent supply current (

∆I

CC) for a unit load of 1 is given in the family specifications.

To determine

∆ICC per input, multiply this value by the unit load coefficient shown in the table below.

AC CHARACTERISTICS FOR 74HCT

GND = 0 V; tf = tf = 6 ns; CL = 50 pF

INPUT

UNIT LOAD COEFFICIENT

OE

0.75

SI

0.40

Dn

0.30

MR

1.50

SO

0.40

SYMBOL PARAMETER

Tamb (°C)

UNIT

TEST CONDITIONS

74HCT

VCC

(V)

WAVEFORMS

+25

−40 to +85 −40 to +125

min. typ.

max.

min.

max.

min.

max.

tPHL/ tPLH propagation delay

MR to DIR, DOR

18

35

44

53

ns

4.5

Fig.8

tPHL

propagation delay

SI to DIR

21

42

53

63

ns

4.5

Fig.6

tPHL

propagation delay

SO to DOR

20

42

53

63

ns

4.5

Fig.9

tPHL/ tPLH propagation delay

SO to Qn

40

80

100

120

ns

4.5

Fig.14

tPLH

propagation delay/

ripple through delay

SI to DOR

188

400

500

600

ns

4.5

Fig.10

tPLH

propagation delay/

bubble-up delay

SO to DIR

244

500

625

750

ns

4.5

Fig.7

tPZH/ tPZL

3-state output enable time

OE to Qn

18

35

44

53

ns

4.5

Fig.16

tPHZ/ tPLZ

3-state output disable

time

OE to Qn

15

30

38

45

ns

4.5

Fig.16

tTHL/ tTLH

output transition time

7

15

19

22

ns

4.5

Fig.14

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