SEMICONDUCTOR TECHNICAL DATA
2–121
REV 5
Motorola, Inc. 1996
3/93
The MC10H/100H660 is a 4–bit ECL input, translating DRAM address
driver, ideally suited for driving TTL compatible DRAM inputs from an ECL
system. It is designed for use in high capacity, highly interleaved DRAM
memory boards, that directly interface to a high speed, pipelined ECL bus
interface, where new operations may be initiated to the board at up to a 50
MHz rate.
The latch provides the capability for the memory controller to propagate
new addresses to different banks without having to wait for the address timing
constraints to be satisfied from a previous memory operation. The dual output
fanout reduces input loading from the controller by a factor of two, thus
significantly improving board etch propagation delays from the controller,
without the need for additional ECL buffering.
The H660 features special TTL outputs which do not have an IOS limiting
resistor, therefore allowing rapid charging of the load capacitance. Output
voltage levels are designed specifically for driving DRAM inputs. The output
stages feature separate power and ground pins to isolate output switching
noise from internal circuitry, and also to improve simultaneous switching
performance.
The 10H version is compatible with MECL 10H ECL logic levels. The
100H version is compatible with 100K levels.
• High Capacitive Drive Outputs to Drive DRAM Address Inputs
• Extra TTL and ECL Power/Ground Pins to Minimize Switching Noise
• Dual Supply
• 10.7 ns Max. D to Q into 300 pF
PIN NAMES
PIN FUNCTION
OGND[0:3] Output Ground (0V)
OVT01, OVT23 Output VCCT (+5.0 V)
IGND01, IGND23 Internal TTL Ground (OV)
IVT01, IVT23 Internal TTL VCCT (+5.0 V)
VEE ECL Neg. Supply (–5.2/ –4.5 V)
VCCE ECL Ground (0V)
D[0:3] Data Inputs (ECL)
Q[0:3]A, Q[0:3]B Data Outputs (TTL levels)
LEN Latch Enable (ECL)
R Reset (ECL)
Q2A
OGND2
Q2B
OVT23
Q3A
OGND3
Q3B
IVT01
IGND01
VEE
VEE
D0
LEN
D1
1
567891011
25 24 23 22 21 20 19
Pinout: 28–Lead PLCC
(Top View)
26
27
28
2
3
412
13
14
15
16
17
18Q1B
OGND1
Q1A
OVT01
Q0B
OGND0
Q0A
IVT23
IGND23
VCCE
VCCE
D3
D2
R
FN SUFFIX
PLASTIC PACKAGE
CASE 776–02
EN
LOGIC SYMBOL
D
EN
R
Q
Q0A
OGND0
Q0B
D
Q1A
OGND1
Q1B
R
Q
D
EN
R
Q
Q2A
OGND2
Q2B
D
EN
R
Q
Q3A
OGND3
Q3B
IGND01
IVT01
IVT23
IGND23
OVT01
ECL Inputs
DRAM Driver
Outputs
VEE
VCCE
D0
D1
D2
D3
LEN
R
OVT23
D
L
H
X
X
LEN
H
H
L
X
R
L
L
L
H
Q
L
H
Q
0
L
TRUTH TABLE