Fairchild Semiconductor 74VCX16601MTDX, 74VCX16601MTD Datasheet

March 1998
Revised April 1999

74VCX16601
Low Voltage 18-Bit Universal Bus Transceivers with 3.6V

Tolerant Inputs and Outputs

74VCX16601 Low Voltage 18-Bit Universal Bus Transceivers with 3.6V Tolerant Inputs and Outputs

General Description

The VCX16601 is an 18-bit universal bus transceiver which
combines D-type latches and D-type flip-flops to allow data
flow in transparent, latched, and clocked modes.

Data flow in each dir ection is controlled by o utput-enable

and OEBA), latch-enable (LEAB and LEBA), and

(OEAB
clock (CLKAB and CLKBA) inputs. The clock can be con­trolled by the clock-enable (CLKENAB
inputs. For A-to-B data flow, the device operates in the
transparent mode when LEAB is HIGH. When LEAB is
LOW, the A data is latched if CLKAB is held at a HIGH-to­LOW logic level. If LEAB is LOW, the A bus data is s tored
in the latch/flip-flop on the LOW-to-HIGH transition of
CLKAB. When OEAB

is HIGH, the outputs are in the high-impedance

OEAB
state.

Data flow for B to A is similar to tha t of A to B but uses

, LEBA, CLKBA and CLKENBA.

OEBA
The VCX16601 is de sign ed for low voltage (1 .65 V t o 3 .6V )

applications with I/O capability up to 3.6V.

V

CC

The VCX16601 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain­ing low CMOS power dissipation.

is LOW, the outputs are active. When

and CLKENBA)

Features

■ 1.65V–3.6V VCC supply operation

■ 3.6V tolerant inputs and outputs

(A to B, B to A)

■ t

PD

2.9 ns max for 3.0V to 3.6V V

3.5 ns max for 2.3V to 2.7V V

7.0 ns max for 1.65V 1.95V V

■ Power-down high impedance inputs and outputs

■ Supports live insertion/withdrawal (Note 1)

■ Static Drive (I

±24 mA @ 3.0V V
±18 mA @ 2.3V V
±6 mA @ 1.65V V

■ Uses patented noise/EMI reduction circuitry

■ Latchup performance exceeds 300 mA

■ ESD performance:

Human body model > 2000V
Machine model >200V

Note 1: To ensure the high-impedance state d uring power up or power

should be tied to VCC through a pull-up r esistor; the min imum

down, OE
value of the res istor is d eter mine d by the cu rre nt-sou rcin g ca pa bility of t he
driver.

OH/IOL

)

CC
CC

CC

CC
CC
CC

Ordering Code:

Order Number Package Number Package Description

74VCX16601MTD MTD56 56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide

Devices also availab le in Tape and Reel. Specify by appending the suffix letter “X” to the o rdering code.

Pin Descriptions

Pin Names Description

, OEBA Output Enable Inputs (Active LOW)

OEAB
LEAB, LEBA Latch Enable Inputs
CLKAB, CLKBA Clock Inputs
CLKENAB
A

B

© 1999 Fairchild Semiconductor Corporation DS500126.prf www.fairchildsemi.com

, CLKENBA Clock Enable Inputs

1–A18
1–B18

Side A Inputs or 3-STATE Outputs
Side B Inputs or 3-STATE Outputs

Connection Diagram Function Table (Note 2)

Inputs Outputs

OEAB LEAB CLKAB A

XHXXXZ
XLHXLL
XLHXHH
HLLXXB
HLLXXB
LLL↑ LL
LLL↑ HH
LLLLXB
LLLHXB

74VCX16601

CLKENAB

H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial (HIGH or LOW, inputs may not float)
Z = High Impedance

Note 2: A-to-B data flow is shown; B-to-A flow is si milar but uses OE BA
LEBA, CLKBA, and C LKENBA

Note 3: Output level before the indicated steady-state inp ut conditions
were established.

Note 4: Output level before the indicated steady-state inp ut conditions
were established, provided that CLKAB was HIGH before LEAB went LOW.

B

n

.

n

(Note 3)

0

(Note 3)

0

(Note 3)

0

(Note 4)

0

,

Logic Diagram

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Absolute Maximum Ratings(Note 5) Recommended Operating

Supply Voltage (VCC) −0.5V to +4.6V
DC Input Voltage (V
Output Voltage (V

) −0.5V to +4.6V

I

)

O

Outputs 3-Stated −0.5V to +4.6V

Outputs Active (Note 6) −0.5 to V
DC Input Diode Current (I
DC Output Diode Current (I

< 0V −50 mA

V

O

> V

V

O

CC

) VI < 0V −50 mA

IK

)

OK

+ 0.5V

CC

+50 mA

DC Output Source/Sink Current

) ±50 mA

(I

OH/IOL

or Ground Current per

DC V

CC

Supply Pin (I
Storage Temperature Range (T

or Ground) ±100 mA

CC

) −65°C to +150°C

STG

Conditions

Power Supply

Operating 1.65V to 3.6V

Data Retention Only 1.2V to 3.6V
Input Voltage −0.3V to 3.6V
Output Voltage (V

Output in Active States 0V to V

Output in 3-STATE 0.0V to 3.6V
Output Current in I

VCC = 3.0V to 3.6V ±24 mA

= 2.3V to 2.7V ±18 mA

V

CC

= 1.65V to 2.3V ±6 mA

V

CC

Free Air Operating Temperature (T
Minimum Input Edge Rate (∆t/∆V)

= 0.8V to 2.0V, VCC = 3.0V 10 ns/V

V

IN

Note 5: The “Absolute Maximum Ratings ” are those val ues beyond w hich
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the Absolute Maximum Rat­ings. The Recommended Operating C onditions tables will d ef ine the condi­tions for actual device operation.

Absolute Maximum Rating must be observed.

Note 6: I

O

Note 7: Floating or unused pin (inputs or I/O's) must be held HIGH or LOW.

(Note 7)

)

O

OH/IOL

) −40°C to +85°C

A

DC Electrical Characteristics (2.7V < VCC ≤ 3.6V)

V

Symbol Parameter Conditions

V

IH

V

IL

V

OH

V

OL

I

I

I

OZ

I

OFF

I

CC

∆I

Note 8: Outputs disab led or 3-STATE only.

HIGH Level Input Voltage 2.7 − 3.6 2.0 V
LOW Level Input Voltage 2.7 − 3.6 0.8 V
HIGH Level Output Voltage IOH = −100 µA2.7 − 3.6 VCC − 0.2

LOW Level Output Voltage IOL = 100 µA2.7 − 3.6 0.2

Input Leakage Current 0V ≤ VI ≤ 3.6V 2.7 − 3.6 ±5.0 µA
3-STATE Output Leakage 0V ≤ VO ≤ 3.6V 2.7 − 3.6 ±10

Power Off Leakage Current 0V ≤ (VI, VO) ≤ 3.6V 0 10 µA
Quiescent Supply Current VI = VCC or GND 2.7 − 3.6 20

Increase in ICC per Input VIH = VCC − 0.6V 2.7 − 3.6 750 µA

CC

IOH = −12 mA 2.7 2.2
IOH = −18 mA 3.0 2.4
IOH = −24 mA 3.0 2.2

IOL = 12 mA 2.7 0.4
IOL = 18 mA 3.0 0.4
IOL = 24 mA 3.0 0.55

VI = VIH or V

VCC ≤ (VI, VO) ≤ 3.6V (Note 8) 2.7 − 3.6 ±20

IL

(V)

CC

Min Max Units

74VCX16601

CC

V

V

µA

µA

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