Datasheet PI74LCX543H, PI74LCX543L, PI74LCX543Q, PI74LCX543S Datasheet (PERICOM)

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PS2102A 02/25/97

Product Description

Pericom Semiconductor’s PI74LCX series of logic circuits are pro­duced in the Company’s advanced 0.6 micron CMOS technology,
achieving industry leading speed grades.

The PI74LCX543 is an 8-bit wide non-inverting transceiver designed
with two sets of eight D-type latches with separate input and output
controls for each set. For data flow from A to B, for example, the
A-to-B Enable (CEAB) input must be LOW in order to enter data
from A0–A7 or to take data from B0–B7, as indicated in the Truth
Table. With CEAB LOW, a LOW signal makes the A-to-B latches
transparent; a subsequent LOW-to-HIGH transition of the LEAB
signal puts the A latches in the storage mode and their outputs no
longer change the A inputs. With CEAB and OEAB both LOW, the
3-state B output buffers are active and reflect the data present at the
output of the A latches. Control of data from B to A is similar, but
uses the CEAB, LEAB, and OEAB inputs.

The PI74LCX543 can be driven from either 3.3V or 5.0V devices
allowing this device to be used as a translator in a mixed

3.3/5.0V system.

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PI74LCX543

Fast CMOS 3.3V 8-Bit Latched Transceiver

Product Features

• Functionally compatible with FCT3, LVT, and 74
series 543 families of products

• Tri-State outputs

• 5V Tolerant inputs and outputs

• 2.0V-3.6V VCC supply operation

• Balanced sink and source output drives (24 mA)

• Low ground bounce outputs

• Supports live insertion

• ESD Protection exceeds 2000V, Human Body Model

200V, Machine Model

• Packages available:
– 24-pin 209-mil wide plastic SSOP (H)
– 24-pin 173-mil wide plastic TSSOP (L)
– 24-pin 150-mil wide plastic QSOP (Q)
– 24-pin 300-mil wide plastic SOIC (S)

Logic Block Diagram

B

0

A

0

DLEQ

D

LE

Q

OEAB

CEAB

LEAB

B

1

B

2

B

3

B

4

B

5

B

6

B

7

OEBA

CEBA

LEBA

A

1

A

2

A

3

A

4

A

5

A

6

A

7

DETAIL A x 7

PI74LCX543

3.3V 8-BIT LATCHED TRANSCEIVER

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PS2102A 02/25/97

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Product Pin Configuration

24-PIN

H24
L24
Q24

S24

LEBA

OEBA

A

0

A1
A2
A3
A4
A5
A6
A7

CEAB

GND

V

CC

CEBA
B

0

B1
B2
B3
B4
B5
B6
B7
LEAB
OEAB

Pin Name Description

OEAB A-to-B Output Enable Input (Active LOW)
OEBA B-to-A Output Enable Input (Active LOW)
CEAB A-to-B Enable Input (Active LOW)
CEBA B-to-A Enable Input (Active LOW)
LEAB A-to-B Latch Enable Input (Active LOW)
LEBA B-to-A Latch Enable Input (Active LOW)
A0-A7 A-to-B Data Inputs or B-to-A 3-State Outputs
B0-B7 B-to-A Data Inputs or A-to-B 3-State Outputs
GND Ground
VCC Power

Product Pin Description

Latch Output

Inputs Status Buffers

CEAB LEAB OEAB A-to-B B0–B7

H X X Storing High-Z
X H X Storing 
XXH  High Z
L L L Transparent Current A Inputs
L H L Storing Previous* A Inputs

Truth Table (Non-Inverting)

(1,2)

For A-to-B (Symmetric with B-to-A)

1. *Before LEAB LOW-to-HIGH Transition
H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care or Irrevelant

2. A-to-B data flow shown; B-to-A flow control is the same,
except using CEBA, LEBA, and OEBA.

1
2
3
4
5
6
7
8
9
10
11
12

24
23
22
21
20
19
18
17
16
15
14
13

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PI74LCX543

3.3V 8-BIT LATCHED TRANSCEIVER

Maximum Ratings

(Above which the useful life may be impaired. For user guidelines, not tested.)

Note:

Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the de­vice. This is a stress rating only and functional opera­tion of the device at these or any other conditions
above those indicated in the operational
sections of this specification is not implied. Exposure
to absolute maximum rating conditions for extended
periods may affect reliability.

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∆/t∆

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etaRegdEtupnIV,V0.2-V8.0=V

CC

V0.3=001V/sn

Recommended Operating Conditions

Storage Temperature............................................................–65°C to +150°C

Ambient Temperature with Power Applied...........................–40°C to +85°C

Supply Voltage to Ground Potential (Inputs & Vcc Only).... –0.5V to +7.0V

Supply Voltage to Ground Potential (Outputs & D/O Only) –0.5V to +7.0V

DC Input Voltage .................................................................. –0.5V to +7.0V

DC Output Current ............................................................................ 120 mA

Power Dissipation...................................................................................1.0W

PI74LCX543

3.3V 8-BIT LATCHED TRANSCEIVER

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Notes:

1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.

2. Typical values are at VCC = 3.3V, +25°C ambient.

3. Per TTL driven input; all other inputs at VCC or GND.

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CC

2.0-——

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CC

7.2=I

OH

Am21–=2.2——

V

CC

0.3=I

OH

Am81–=4.2——

I

OH

Am42–=2.2——

V

OL

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CC

6.3-7.2=I

OL

Am1.0=——2.0

V

CC

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OL

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V

CC

0.3=I

OL

Am61=——4.0

I

OL

Am42=——55.0

V

IK

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I

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V

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V

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CC

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CC

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IN

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8

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Capacitance

DC Electrical Characteristics (Over the Operating Range, TA = −40°C to +85°C, VCC = 2.7V to 3.6V)

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PS2102A 02/25/97

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PI74LCX543

3.3V 8-BIT LATCHED TRANSCEIVER

Switching Characteristics over Operating Range

Note:

1. Skew between any two outputs, of the same package, switching in the same direction.

Dynamic Switching Characteristics (TA = +25°C)

Note:

1. Measured with n–1 outputs switching from High-to-Low or Low-to-High. The remaining output is
measured in the LOW state.

Pericom Semiconductor Corporation

2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax [phone] • http://www.pericom.com

VCC = 3.3V ± 0.3V VCC = 2.7V

Parameters Description Conditions Min. Max. Min. Max. Units

tPLH Propagation Delay Transparent CL = 50 pF 1.5 7.0 1.5 8.0
tPHL Mode AN to BN or BN to AN RL = 500Ω

tPLH Propagation Delay 1.5 8.5 1.5 9.5
tPHL LEBA to AN, LEAB to BN

tPZH Output Enable Time 1.5 9.0 1.5 10.0
tPZL OEBA or OEAB to AN or BN

CEBA or CEAB to AN or BN

tPZH Output Disable Time

(3)

1.5 7.0 1.5 7.5 ns

tPZL OEBA or OEAB to AN or BN

CEBA or CEAB to AN or BN

tSU Setup Time, HIGH or LOW 2.5 — 2.5 —

AN or BN to LEBA or LEAB

tH Hold Time, HIGH or LOW 1.5 — 1.5 —

AN or BN to LEBA or LEAB

tW LEBA or LEAB Pulse Width LOW

(3)

3.3 — 3.3 —

tsk(o) Output Skew

(1)

— 1.0 — —

Parameters Description Test Conditions

(1)

Typ. Units

VOLP Dynamic LOW Peak Voltage VCC = 3.3V, CL = 50pF 0.8 V

VIH = 3.3V, VIL = 0V

VOLV Dynamic LOW Valley Voltage VCC = 3.3V, CL = 50pF 0.8 V

VIH = 3.3V, VIL = 0V