Philips Semiconductors Advanced BiCMOS Products
Product specification
Dual 10-bit bus interface latch (3-State)
MB2841
The MB2841 consists of two sets of ten
FEATURES
• High speed parallel latches
• Live insertion/extraction permitted
• Output capability: +64mA/–32mA
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.
• 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
• 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
DESCRIPTION
Data appears on the bus when the Output
Enable (nOE) is Low. When nOE is High the
output is in the High-impedance state.
The MB2841 Bus interface register is
designed to provide extra data width for wider
data/address paths of buses carrying parity.
QUICK REFERENCE DATA
CONDITIONS
= 25°C; GND = 0V
SYMBOL
PARAMETER
TYPICAL UNIT
T
amb
t
t
Propagation delay
nDx to nQx
PLH
PHL
C = 50pF; V = 5V
3.5
ns
L
CC
C
Input capacitance
Output capacitance
Total supply current
V = 0V or V
CC
4
7
pF
pF
µA
IN
I
C
V
= 0V or V ; 3-State
O CC
OUT
CCZ
I
Outputs disabled; V = 5.5V
120
CC
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
45
44
42
41
39
38 37
36 35
34
52 51 50 49 48 47 46 45 44 43 42 41 40
1
1D0 1D1 1D2 1D3 1D4 1D5 1D6 1D7 1D8 1D9
1LE
1Q4
1Q5
1Q6
GND
39 1D4
38 1D5
37 1D6
36 1D7
2
3
4
46
47
1OE
1Q0 1Q1 1Q2 1Q3 1Q4 1Q5 1Q6 1Q7 1Q8 1Q9
1Q7
1Q8
1Q9
2Q0
5
6
7
8
35 1D8
34 1D9
33 2D0
32 2D1
MB2841
52-pin PQFP
48
33
49
32
50
31
51
29
1
2
3
5
6
7
28
27
25
24
23
22
2Q1
9
31 2D2
30 GND
29 2D3
28 2D4
2D0 2D1 2D2 2D3 2D4 2D5 2D6 2D7 2D8 2D9
2LE
2Q2 10
2Q3 11
2Q4 12
21
20
2OE
2Q0 2Q1 2Q2 2Q3 2Q4 2Q5 2Q6 2Q7 2Q8 2Q9
2Q5 13
27 2D5
14 15 16 17 18 19 20 21 22 23 24 25 26
8
9
10
11
12
13
15
16
18
19
1
August 24, 1993
853-1668 10619