SN74FB1650

18BIT TTL/BTL UNIVERSAL STORAGE TRANSCEIVER

SCBS178O − AUGUST 1992 − REVISED MARCH 2004

4

POST OFFICE BOX 655303

recommended operating conditions (see Note 2)

MIN

NOM

MAX

UNIT

VCC,

BG VCC,

BIAS VCC

Supply voltage

4.5

5

5.5

V

VIH

High-level input voltage

B port

1.62

2.3

V

VIH

High-level input voltage

Except B port

2

V

VIL

Low-level input voltage

B port

0.75

1.47

V

VIL

Low-level input voltage

Except B port

0.8

V

IIK

Input clamp current

−18

mA

IOH

High-level output current

A port

−3

mA

IOL

Low-level output current

A port

24

mA

IOL

Low-level output current

B port

100

mA

TA

Operating free-air temperature

0

70

°C

NOTE 2: To ensure proper device operation, all unused inputs must be terminated as follows: A and control inputs to VCC(5 V) or GND, and

B inputs to GND only. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004.

electrical characteristics over recommended operating free-air temperature range

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VIK

B port

VCC = 4.5 V,

II = −18 mA

−1.2

V

VIK

Except B port

VCC = 4.5 V,

II = −40 mA

−0.5

V

VOH

AO port

VCC = 4.5 V,

IOH = −3 mA

2.5

3.3

V

AO port

VCC = 4.5 V,

IOL = 24 mA

0.35

0.5

VOL

B port

VCC = 4.5 V

IOL = 80 mA

0.75

1.1

V

VOL

B port

VCC = 4.5 V

IOL = 100 mA

1.15

V

II

Except B port

VCC = 5.5 V,

VI = 5.5 V

50

µA

IIH‡

Except B port

VCC = 5.5 V,

VI = 2.7 V

50

µA

IIL‡

Except B port

VCC = 5.5 V,

VI = 0.5 V

−50

A

IIL‡

B port

VCC = 5.5 V,

VI = 0.75 V

−100

µA

IOZH

AO port

VCC = 5.5 V,

VO = 2.7 V

50

µA

IOZL

AO port

VCC = 5.5 V,

VO = 0.5 V

−50

µA

IOZPU

AO port

VCC = 0 to 2.1 V,

VO = 0.5 V to 2.7 V

50

µA

IOZPD

AO port

VCC = 2.1 V to 0,

VO = 0.5 V to 2.7 V

−50

µA

IOH

B port

VCC = 0 to 5.5 V,

VO = 2.1 V

100

µA

IOS§

A port

VCC = 5.5 V,

VO = 0

−30

−150

mA

ICC

A port to B port

VCC = 5.5 V,

IO = 0

100

mA

ICC

B port to A port

VCC = 5.5 V,

IO = 0

120

mA

Ci

AI port

VI = VCC or GND

5.5

pF

Ci

Control inputs

VI = VCC or GND

5.5

pF

Co

AO ports

VO = VCC or GND

5.5

pF

Cio

B port per IEEE Std 1194.1-1991

VCC = 0 to 5.5 V

5.5

pF

† All typical values are at VCC = 5 V, TA = 25°C.

‡ For I/O ports, the parameters IIH and IIL include the off-state output current.

§ Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second.