SM5839A
NIPPON PRECISION CIRCUITS INC.
High-Speed Variable-Length Shift Register
OVERVIEW
The SM5839A is an 8-bit variable-length shift
resister. The input pins can be configured to function
as a 2 to 128-step shift resister. The shift clock has a
maximum frequency of 54 MHz, making it ideal for
high-speed digital signal processing.
PACKAGE DIMENSIONS
Unit: mm
28-pin DIP (SM5839AP)
13.72
±
0.1
15.56
±
0.3
FEATURES
s
s
s
s
s
s
s
s
s
PINOUT
Top view
0.5755 TYP.
9.8
±
0.2
5.6
±
0.2
7.6
±
0.2
2 to 128-step selectable variable-length shift
resister
Static circuitry
8-bit (byte) word length
Selectable circulating/non-circulating storage
54 MHz maximum operating clock frequency
(standard-voltage specification)
Supply voltage
• 5.0
±
0.5 V (standard-voltage specification)
• 2.7 to 4.5 V (low-voltage specification)
TTL-compatible input/outputs
Molybdenum-gate CMOS
Package
• 28-pin DIP (SM5839AP)
• 28-pin VSOP (SM5839AV)
1.52
±
0.05
3.81
±
0.1
0.83
±
0.3
3.18
±
0.1
2.54
0.46
±
0.05
28-pin VSOP (SM5839AV)
4.64
±
0.3
0 10
+
0.1
0.15
−
0.05
0.10
±
0.05
1.15
±
0.1
+
0.1
0.22
−
0.05
0.5 0.2
0.65
DIN0
DIN1
DIN2
DIN3
DIN4
DIN5
DIN6
DIN7
S6
1
2
3
4
28
27
26
25
VDD
ENRC
OE
DOUT0
DOUT1
DOUT2
DOUT3
DOUT4
DOUT5
DOUT6
DOUT7
S0
S1
S2
ORDERING INFORMATION
Device
SM5839AP
SM5839AV
Package
28-pin DIP
28-pin VSOP
5
6
7
8
9
24
23
22
21
20
19
18
17
16
15
S5 10
S4 11
S3 12
CLK
13
VSS 14
NIPPON PRECISION CIRCUITS—1
0.25
±
0.05
36.83
±
0.1
16.38
±
0.6
SM5839A
NPC [ NIPPON PRECISION CIRCUITS INC ]
