8-BIT SCANNABLE
REGISTER
SY10E241
SY100E241
FEATURES
s
1000ps max. CLK to output
s
Extended 100E V
EE
range of –4.2V to –5.5V
s
s
s
s
SHIFT overrides HOLD, /LOAD control
Asynchronous Master Reset
Pin-compatible with E141
Fully compatible with industry standard 10KH,
100K ECL levels
s
Internal 75K
Ω
input pulldown resistors
s
Fully compatible with Motorola MC10E/100E241
s
Available in 28-pin PLCC package
DESCRIPTION
The SY10/100E241 are 8-bit shiftable registers designed
for use in new, high-performance ECL systems. Unlike the
E141, the E241 features internal data feedback organized
such that the SHIFT control overrides the HOLD, /LOAD
control. Thus, the normal operations of HOLD and LOAD
can be toggled with a single control line without the need for
external gating. This configuration also enables switching
to scan mode with the single SHIFT control line.
The eight inputs D
0
–D
7
accept parallel input data, while
S-IN accepts serial input data when in shift mode. Data is
accepted a set-up time before the rising edge of CLK.
Shifting is also accomplished on the rising clock edge. A
HIGH on the Master Reset pin (MR) asychronously resets
all the registers to zero.
BLOCK DIAGRAM
S-IN
D
D
0
Q
R
Q
0
PIN CONFIGURATION
D
5
V
CCO
SEL
0
NC
D
7
D
6
Q
7
25 24 23 22 21 20 19
SEL
1
CLK
MR
V
EE
S-IN
D
0
D
1
26
27
28
1
2
3
4
5
6
7
8
9
10 11
18
17
Q
6
Q
5
V
CC
NC
V
CCO
Q
4
Q
3
D
D
1
– D
6
Q
R
Q
1
– Q
6
TOP VIEW
PLCC
J28-1
16
15
14
13
12
BITS 1-6
D
2
D
3
D
D
7
SEL
1
(HOLD/LOAD)
SEL
0
(SHIFT)
CLK
MR
Q
R
Q
7
PIN NAMES
Pin
D
0
–D
7
S-IN
SEL
0
SEL
1
CLK
MR
Q
0
–Q
7
V
CCO
Function
Parallel Data Inputs
Serial Data Input
SHIFT Control
HOLD, /LOAD Control
Clock
Master Reset
Data Outputs
V
CC
to Output
V
CCO
Q
0
Q
1
Q
2
Rev.: C
D
4
Amendment: /1
1
Issue Date: February, 1998
Micrel
SY10E241
SY100E241
TRUTH TABLE
SEL
0
L
L
H
SEL
1
L
H
X
Function
Load
Hold
Shift (D
n
to D
n+1
)
DC ELECTRICAL CHARACTERISTICS
V
EE
= V
EE
(Min.) to V
EE
(Max.); V
CC
= V
CCO
= GND
T
A
= 0
°
C
Symbol
I
IH
I
EE
Parameter
Input HIGH Current
Power Supply Current
10E
100E
—
—
125
125
150
150
—
—
125
125
150
150
—
—
125
144
150
173
—
—
150
T
A
= +25
°
C
—
—
150
T
A
= +85
°
C
Typ.
—
Max.
150
Unit
µA
mA
Condition
—
—
—
Min. Typ. Max. Min. Typ.
Max. Min.
AC ELECTRICAL CHARACTERISTICS
V
EE
= V
EE
(Min.) to V
EE
(Max.); V
CC
=
VCCO
= GND
T
A
= 0
°
C
Symbol
f
SHIFT
t
PLH
t
PHL
t
S
Parameter
Max. Shift Frequency
Propagation Delay to Output
CLK
MR
Set-up Time
D
SEL
0
(SHIFT)350
SEL
1
(HOLD/LOAD)
S-IN
Hold Time
D
SEL
0
(SHIFT)
SEL
1
(HOLD/LOAD)
S-IN
Reset Recovery Time
Minimum Pulse Width
CLK, MR
Within-Device Skew
Rise/Fall Time
20% to 80%
700
625
600
175
200
400
125
200
100
50
300
900
400
—
300
900
750
725
25
—
250
–100
–25
–200
–250
100
600
—
60
525
—
975
975
—
350
—
—
—
—
—
—
—
—
—
800
T
A
= +25
°
C
700
625
600
175
200
400
125
200
100
50
300
900
400
—
300
900
750
725
25
—
250
–100
–25
–200
–250
100
600
—
60
525
—
975
975
—
350
—
—
—
—
—
—
—
—
—
800
T
A
= +85
°
C
Max.
—
975
975
ps
175
200
400
125
200
100
50
300
900
400
—
300
25
—
250
–100
–25
–200
–250
100
600
—
60
525
—
—
—
ps
—
—
—
—
—
—
—
800
ps
ps
ps
ps
—
—
1
—
—
—
Unit
MHz
ps
625
600
750
725
Condition
—
—
700
900
Min. Typ. Max. Min. Typ.
Max. Min. Typ.
t
H
t
RR
t
PW
t
skew
t
r
t
f
NOTE:
1. Within-device skew is defined as identical transitions on similar paths
through a device.
PRODUCT ORDERING CODE
Ordering
Code
SY10E241JC
SY10E241JCTR
SY100E241JC
SY100E241JCTR
2
Package
Type
J28-1
J28-1
J28-1
J28-1
Operating
Range
Commercial
Commercial
Commercial
Commercial
Micrel
SY10E241
SY100E241
MICREL-SYNERGY
TEL
3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA
FAX
+ 1 (408) 980-9191
+ 1 (408) 914-7878
WEB
http://www.micrel.com
This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or
other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc.
© 2000 Micrel Incorporated
4
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