Philips mb2841 DATASHEETS

Philips Semiconductors Advanced BiCMOS Products Product specification

MB2841Dual 10-bit bus interface latch (3-State)

1

August 24, 1993 853-1668 10619

FEATURES

•High speed parallel latches

•Live insertion/extraction permitted

•Extra data width for wide address/data

paths or buses carrying parity

•Power-up 3-State

•Power-up reset

•Ideal where high speed, light loading, or

increased fan-in are required with MOS
microprocessors

•Output capability: +64mA/–32mA

•Latch-up protection exceeds 500mA per

Jedec JC40.2 Std 17

•ESD protection exceeds 2000V per MIL

STD 883 Method 3015 and 200V per
Machine Model

DESCRIPTION

The MB2841 Bus interface register is
designed to provide extra data width for wider
data/address paths of buses carrying parity.

The MB2841 consists of two sets of ten
D-type latches with 3-State outputs. The
flip-flops appear transparent to the data when
Latch Enable (nLE) is High. This allows
asynchronous operation, as the output
transition follows the data in transition. On the
nLE High-to-Low transition, the data that
meets the setup and hold time is latched.

Data appears on the bus when the Output
Enable (nOE

) is Low. When nOE is High the

output is in the High-impedance state.

QUICK REFERENCE DATA

SYMBOL PARAMETER

CONDITIONS

T

amb

= 25°C; GND = 0V

TYPICAL UNIT

t

PLH

t

PHL

Propagation delay
nDx to nQx

CL = 50pF; VCC = 5V 3.5 ns

C

IN

Input capacitance VI = 0V or V

CC

4 pF

C

OUT

Output capacitance VO = 0V or VCC; 3-State 7 pF

I

CCZ

Total supply current Outputs disabled; VCC = 5.5V 120 µA

ORDERING INFORMATION

PACKAGES TEMPERATURE RANGE ORDER CODE DRAWING NUMBER

52-pin Plastic Quad Flat Pack (PQFP) -40°C to +85°C MB2841BB 1418B

PIN CONFIGURATION LOGIC SYMBOL

5

Vcc

1Q3

1Q2

1Q1

1Q0

1OE

1LE

1D0

1D1

GND

1D2

1D3

Vcc

Vcc

2Q6

2Q7

GND

2Q8

2Q9

2OE

2LE

2D9

2D8

2D7

2D6

Vcc

19 2220 231716 25 26241514 2118

1Q8

2Q1

1Q9

2Q2

GND

1Q6

2Q4
2Q5

2Q3

1Q5

2Q0

1Q7

1Q4

1
2
3
4

6
7
8

9
10
11
12

13

47 4446 434950 41 40425152 4548

1D9

2D2

2D0

GND

1D7

1D6

2D4
2D5

2D3

1D5

2D1

1D8

1D439
38
37
36

35
34
33
32
31
30
29
28

27

MB2841

52-pin PQFP

45 44 42 41 39 38 37 36

1D0 1D1 1D2 1D3 1D4 1D5 1D6 1D7

1Q0 1Q1 1Q2 1Q3 1Q4 1Q5 1Q6 1Q7

48 49 50 51 1 2 3 5

46
47

1LE
1OE

35 34

1D8 1D9

1Q8 1Q9

6 7

33 32 31 29 28 27 25 24

2D0 2D1 2D2 2D3 2D4 2D5 2D6 2D7

2Q0 2Q1 2Q2 2Q3 2Q4 2Q5 2Q6 2Q7

8 9 10 11 12 13 15 16

21
20

2LE
2OE

23 22

2D8 2D9

2Q8 2Q9

18 19

È

È

È

Philips Semiconductors Advanced BiCMOS Products Product specification

MB2841Dual 10-bit bus interface latch (3-State)

August 24, 1993

2

PIN DESCRIPTION

PIN NUMBER SYMBOL FUNCTION

45, 44, 42, 41, 39, 38, 37, 36, 35, 34,

33, 32, 31, 29, 28, 27, 25, 24, 23, 22

1D0 – 1D9
2D0 – 2D9

Data inputs

48, 49, 50, 51, 1, 2, 3, 5, 6, 7, 8, 9,

10, 11, 12, 13, 15, 16, 18, 19

1Q0 – 1Q9
2Q0 – 2Q9

Data outputs

47, 20 1OE, 2OE Output enable inputs (active-Low)
46, 21 1LE, 2LE Latch enable inputs (active rising edge)

4, 17, 30, 43 GND Ground (0V)

14, 26, 40, 52 V

CC

Positive supply voltage

LOGIC SYMBOL (IEEE/IEC)

C1

C1

45 48
44 49
42 50
41 51
39 1
38 2
37 3
36 5

1D

46

EN

47

35 6
34 7

33 8
32 9
31 10
29 11
28 12
27 13
25 15
24 16

1D

21

EN

20

23 18
22 19

FUNCTION TABLE

INPUTS OUTPUTS OPERATING MODE

nOE nLE nDx nQ0 – nQ9

L
L

H
H

L

H

L

H

Transparent

L
L

↓
↓

l

h

L

H

Latched

H X X Z High impedance

L L X NC Hold

H = High voltage level
h = High voltage level one set-up time prior to the High-to-Low LE transition
L = Low voltage level
l = Low voltage level one set-up time prior to the High-to-Low LE transition
↓ = High-to-Low LE transition
NC= No change
X = Don’t care
Z = High impedance “off” state

Philips Semiconductors Advanced BiCMOS Products Product specification

MB2841Dual 10-bit bus interface latch (3-State)

August 24, 1993

3

LOGIC DIAGRAM

L Q

D

nD0

nQ0

nLE

nOE

L Q

D

nD1

nQ1

L Q

D

nD2

nQ2

L Q

D

nD3

nQ3

L Q

D

nD4

nQ4

L Q

D

nD5

nQ5

L Q

D

nD6

nQ6

L Q

D

nD7

nQ7

L Q

D

nD8

nQ8

L Q

D

nD9

nQ9

ABSOLUTE MAXIMUM RATINGS

1, 2

SYMBOL

PARAMETER CONDITIONS RATING UNIT

V

CC

DC supply voltage –0.5 to +7.0 V

I

IK

DC input diode current VI < 0 –18 mA

V

I

DC input voltage

3

–1.2 to +7.0 V

I

OK

DC output diode current VO < 0 –50 mA

V

OUT

DC output voltage

3

output in Off or High state –0.5 to +5.5 V

I

OUT

DC output current output in Low state 128 mA

T

stg

Storage temperature range –65 to 150 °C

NOTES:

1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the
device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability.

2. The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction
temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150°C.

3. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.

RECOMMENDED OPERATING CONDITIONS

SYMBOL PARAMETER LIMITS UNIT

Min Max

V

CC

DC supply voltage 4.5 5.5 V

V

I

Input voltage 0 V

CC

V

V

IH

High-level input voltage 2.0 V

V

IL

Low-level Input voltage 0.8 V

I

OH

High-level output current –32 mA

I

OL

Low-level output current 64 mA

∆t/∆v Input transition rise or fall rate 0 5 ns/V

T

amb

Operating free-air temperature range –40 +85 °C